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+---
+stage: Growth
+group: Product Intelligence
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
+---
+
+# Implement Snowplow tracking
+
+This guide describes how to implement and test Snowplow tracking using JavaScript and Ruby trackers.
+
+## Snowplow JavaScript frontend tracking
+
+GitLab provides a `Tracking` interface that wraps the [Snowplow JavaScript tracker](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/javascript-trackers/) to track custom events. For the recommended implementation type, see [Usage recommendations](#usage-recommendations).
+
+Tracking implementations must have an `action` and a `category`. You can provide additional [structured event taxonomy](index.md#structured-event-taxonomy) categories with an `extra` object that accepts key-value pairs.
+
+| Field      | Type   | Default value              | Description                                                                                                                                                                                                    |
+|:-----------|:-------|:---------------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `category` | string | `document.body.dataset.page` | Page or subsection of a page in which events are captured.                                                                                                                                            |
+| `action`   | string | generic                  | Action the user is taking. Clicks must be `click` and activations must be `activate`. For example, focusing a form field is `activate_form_input`, and clicking a button is `click_button`. |
+| `data`     | object | `{}`                         | Additional data such as `label`, `property`, `value`, `context` as described in [Structured event taxonomy](index.md#structured-event-taxonomy), and `extra` (key-value pairs object). |
+
+### Usage recommendations
+
+- Use [data attributes](#implement-data-attribute-tracking) on HTML elements that emit `click`, `show.bs.dropdown`, or `hide.bs.dropdown` events.
+- Use the [Vue mixin](#implement-vue-component-tracking) for tracking custom events, or if the supported events for data attributes are not propagating. 
+- Use the [tracking class](#implement-raw-javascript-tracking) when tracking raw JavaScript files.
+
+### Implement data attribute tracking
+
+To implement tracking for HAML or Vue templates, add a [`data-track` attribute](#data-track-attributes) to the element.
+
+The following example shows `data-track-*` attributes assigned to a button:
+
+```haml
+%button.btn{ data: { track: { action: "click_button", label: "template_preview", property: "my-template" } } }
+```
+
+```html
+<button class="btn"
+  data-track-action="click_button"
+  data-track-label="template_preview"
+  data-track-property="my-template"
+  data-track-extra='{ "template_variant": "primary" }'
+/>
+```
+
+#### `data-track` attributes
+
+| Attribute             | Required | Description |
+|:----------------------|:---------|:------------|
+| `data-track-action`    | true     | Action the user is taking. Clicks must be prepended with `click` and activations must be prepended with `activate`. For example, focusing a form field is `activate_form_input` and clicking a button is `click_button`. Replaces `data-track-event`, which was [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/290962) in GitLab 13.11. |
+| `data-track-label`    | false    | The `label` as described in [structured event taxonomy](index.md#structured-event-taxonomy). |
+| `data-track-property` | false    | The `property` as described in [structured event taxonomy](index.md#structured-event-taxonomy). |
+| `data-track-value`    | false    | The `value` as described in [structured event taxonomy](index.md#structured-event-taxonomy). If omitted, this is the element's `value` property or `undefined`. For checkboxes, the default value is the element's checked attribute or `0` when unchecked. |
+| `data-track-extra` | false    | A key-value pairs object passed as a valid JSON string. This is added to the `extra` property in our [`gitlab_standard`](schemas.md#gitlab_standard) schema. |
+| `data-track-context`  | false    | The `context` as described in our [Structured event taxonomy](index.md#structured-event-taxonomy). |
+
+#### Event listeners
+
+Event listeners are bound at the document level to handle click events in elements with data attributes. This allows them to be handled on re-rendering and changes to the DOM. Because of the way these events are bound, click events should not stop from propagating up the DOM tree. If click events are stopped from propagating, you must implement listeners and follow the instructions in [Implement Vue component tracking](#implement-vue-component-tracking) or [Implement raw JavaScript tracking](#implement-raw-javascript-tracking).
+
+#### Available helpers
+
+```ruby
+tracking_attrs(label, action, property) # { data: { track_label... } }
+
+%button{ **tracking_attrs('main_navigation', 'click_button', 'navigation') }
+```
+
+#### Caveats
+
+When using the GitLab helper method [`nav_link`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/helpers/tab_helper.rb#L76) be sure to wrap `html_options` under the `html_options` keyword argument.
+Be careful, as this behavior can be confused with the `ActionView` helper method [`link_to`](https://api.rubyonrails.org/v5.2.3/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to) that does not require additional wrapping of `html_options`
+
+```ruby
+# Bad
+= nav_link(controller: ['dashboard/groups', 'explore/groups'], data: { track_label: "explore_groups", track_action: "click_button" })
+
+# Good
+= nav_link(controller: ['dashboard/groups', 'explore/groups'], html_options: { data: { track_label: "explore_groups", track_action: "click_button" } })
+
+# Good (other helpers)
+= link_to explore_groups_path, title: _("Explore"), data: { track_label: "explore_groups", track_action: "click_button" }
+```
+
+### Implement Vue component tracking
+
+For custom event tracking, use a Vue `mixin` in components. Vue `mixin` exposes the `Tracking.event` static method and the `track` method called from components or templates. You can specify tracking options in `data` or `computed`. These options override any defaults and allow the values to be dynamic from props or based on state. 
+
+Default options are passed when an event is tracked from the component. If you don't specify an option, the default `document.body.dataset.page` is used. The default options are: 
+
+- `category`
+- `label`
+- `property` 
+- `value`
+
+To implement Vue component tracking:
+
+1. Import the `Tracking` library and request a `mixin`:
+
+    ```javascript
+    import Tracking from '~/tracking';
+    const trackingMixin = Tracking.mixin;
+    ```
+
+1. Provide categories to track the event from the component. For example, to track all events in a component with a label, use the `label` category:
+
+    ```javascript
+    import Tracking from '~/tracking';
+    const trackingMixin = Tracking.mixin({ label: 'right_sidebar' });
+    ```
+
+1. In the component, declare the Vue `mixin`.
+
+    ```javascript
+    export default {
+      mixins: [trackingMixin],
+      // ...[component implementation]...
+      data() {
+        return {
+          expanded: false,
+          tracking: {
+            label: 'left_sidebar',
+          },
+        };
+      },
+    };
+    ```
+
+1. To receive event data as a tracking object or computed property: 
+   - Declare it in the `data` function. Use a `tracking` object when default event properties are dynamic or provided at runtime:
+
+      ```javascript
+      export default {
+        name: 'RightSidebar',
+        mixins: [Tracking.mixin()],
+        data() {
+          return {
+            tracking: {
+              label: 'right_sidebar',
+              // category: '',
+              // property: '',
+              // value: '',
+              // experiment: '',
+              // extra: {},
+            },
+          };
+        },
+      };
+      ```
+
+   - Declare it in the event data in the `track` function. This object merges with any previously provided options:
+
+      ```javascript
+      this.track('click_button', {
+        label: 'right_sidebar',
+      });
+      ```
+
+1. Optional. Use the `track` method in a template:
+
+    ```html
+    <template>
+      <div>
+        <button data-testid="toggle" @click="toggle">Toggle</button>
+
+        <div v-if="expanded">
+          <p>Hello world!</p>
+          <button @click="track('click_action')">Track another event</button>
+        </div>
+      </div>
+    </template>
+    ```
+
+#### Implementation example
+
+```javascript
+export default {
+  name: 'RightSidebar',
+  mixins: [Tracking.mixin({ label: 'right_sidebar' })],
+  data() {
+    return {
+      expanded: false,
+    };
+  },
+  methods: {
+    toggle() {
+      this.expanded = !this.expanded;
+      // Additional data will be merged, like `value` below
+      this.track('click_toggle', { value: Number(this.expanded) });
+    }
+  }
+};
+```
+
+#### Testing example
+
+```javascript
+import { mockTracking } from 'helpers/tracking_helper';
+// mockTracking(category, documentOverride, spyMethod)
+
+describe('RightSidebar.vue', () => {
+  let trackingSpy;
+  let wrapper;
+
+  beforeEach(() => {
+    trackingSpy = mockTracking(undefined, wrapper.element, jest.spyOn);
+  });
+
+  const findToggle = () => wrapper.find('[data-testid="toggle"]');
+
+  it('tracks turning off toggle', () => {
+    findToggle().trigger('click');
+
+    expect(trackingSpy).toHaveBeenCalledWith(undefined, 'click_toggle', {
+      label: 'right_sidebar',
+      value: 0,
+    });
+  });
+});
+```
+
+### Implement raw JavaScript tracking
+
+To call custom event tracking and instrumentation directly from the JavaScript file, call the `Tracking.event` static function. 
+
+The following example demonstrates tracking a click on a button by manually calling `Tracking.event`.
+
+```javascript
+import Tracking from '~/tracking';
+
+const button = document.getElementById('create_from_template_button');
+
+button.addEventListener('click', () => {
+  Tracking.event('dashboard:projects:index', 'click_button', {
+    label: 'create_from_template',
+    property: 'template_preview',
+    extra: {
+      templateVariant: 'primary',
+      valid: 1,
+    },
+  });
+});
+```
+
+#### Testing example
+
+```javascript
+import Tracking from '~/tracking';
+
+describe('MyTracking', () => {
+  let wrapper;
+
+  beforeEach(() => {
+    jest.spyOn(Tracking, 'event');
+  });
+
+  const findButton = () => wrapper.find('[data-testid="create_from_template"]');
+
+  it('tracks event', () => {
+    findButton().trigger('click');
+
+    expect(Tracking.event).toHaveBeenCalledWith(undefined, 'click_button', {
+      label: 'create_from_template',
+      property: 'template_preview',
+      extra: {
+        templateVariant: 'primary',
+        valid: true,
+      },
+    });
+  });
+});
+```
+
+### Form tracking
+
+Enable Snowplow automatic [form tracking](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/javascript-trackers/javascript-tracker/javascript-tracker-v2/tracking-specific-events/#form-tracking) by calling `Tracking.enableFormTracking` (after the DOM is ready) and providing a `config` object that includes at least one of the following elements:
+
+- `forms`: determines which forms are tracked, and are identified by the CSS class name.
+- `fields`: determines which fields inside the tracked forms are tracked, and are identified by the field `name`.
+
+An optional list of contexts can be provided as the second argument.
+Note that our [`gitlab_standard`](schemas.md#gitlab_standard) schema is excluded from these events.
+
+```javascript
+Tracking.enableFormTracking({
+  forms: { allow: ['sign-in-form', 'password-recovery-form'] },
+  fields: { allow: ['terms_and_conditions', 'newsletter_agreement'] },
+});
+```
+
+#### Testing example
+
+```javascript
+import Tracking from '~/tracking';
+
+describe('MyFormTracking', () => {
+  let formTrackingSpy;
+
+  beforeEach(() => {
+    formTrackingSpy = jest
+      .spyOn(Tracking, 'enableFormTracking')
+      .mockImplementation(() => null);
+  });
+
+  it('initialized with the correct configuration', () => {
+    expect(formTrackingSpy).toHaveBeenCalledWith({
+      forms: { allow: ['sign-in-form', 'password-recovery-form'] },
+      fields: { allow: ['terms_and_conditions', 'newsletter_agreement'] },
+    });
+  });
+});
+```
+
+## Implement Snowplow Ruby (Backend) tracking
+
+GitLab provides `Gitlab::Tracking`, an interface that wraps the [Snowplow Ruby Tracker](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/ruby-tracker/) for tracking custom events.
+
+Custom event tracking and instrumentation can be added by directly calling the `GitLab::Tracking.event` class method, which accepts the following arguments:
+
+| argument   | type                      | default value | description                                                                                                                       |
+|------------|---------------------------|---------------|-----------------------------------------------------------------------------------------------------------------------------------|
+| `category` | String                    |               | Area or aspect of the application. This could be `HealthCheckController` or `Lfs::FileTransformer` for instance.                  |
+| `action`   | String                    |               | The action being taken, which can be anything from a controller action like `create` to something like an Active Record callback. |
+| `label`    | String                    | nil           | As described in [Structured event taxonomy](index.md#structured-event-taxonomy).                                                          |
+| `property` | String                    | nil           | As described in [Structured event taxonomy](index.md#structured-event-taxonomy).                                                          |
+| `value`    | Numeric                   | nil           | As described in [Structured event taxonomy](index.md#structured-event-taxonomy).                                                          |
+| `context`  | Array\[SelfDescribingJSON\] | nil           | An array of custom contexts to send with this event. Most events should not have any custom contexts.                             |
+| `project`  | Project                   | nil           | The project associated with the event. |
+| `user`     | User                      | nil           | The user associated with the event. |
+| `namespace` | Namespace                | nil           | The namespace associated with the event. |
+| `extra`   | Hash                | `{}`         | Additional keyword arguments are collected into a hash and sent with the event. |
+
+Tracking can be viewed as either tracking user behavior, or can be used for instrumentation to monitor and visualize performance over time in an area or aspect of code.
+
+For example:
+
+```ruby
+class Projects::CreateService < BaseService
+  def execute
+    project = Project.create(params)
+
+    Gitlab::Tracking.event('Projects::CreateService', 'create_project', label: project.errors.full_messages.to_sentence,
+                           property: project.valid?.to_s, project: project, user: current_user, namespace: namespace)
+  end
+end
+```
+
+### Unit testing
+
+Use the `expect_snowplow_event` helper when testing backend Snowplow events. See [testing best practices](
+https://docs.gitlab.com/ee/development/testing_guide/best_practices.html#test-snowplow-events) for details.
+
+### Performance
+
+We use the [AsyncEmitter](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/ruby-tracker/emitters/#the-asyncemitter-class) when tracking events, which allows for instrumentation calls to be run in a background thread. This is still an active area of development.
+
+## Develop and test Snowplow
+
+There are several tools for developing and testing a Snowplow event.
+
+| Testing Tool                                 | Frontend Tracking  | Backend Tracking    | Local Development Environment | Production Environment | Production Environment |
+|----------------------------------------------|--------------------|---------------------|-------------------------------|------------------------|------------------------|
+| Snowplow Analytics Debugger Chrome Extension | **{check-circle}** | **{dotted-circle}** | **{check-circle}**            | **{check-circle}**     | **{check-circle}**     |
+| Snowplow Inspector Chrome Extension          | **{check-circle}** | **{dotted-circle}** | **{check-circle}**            | **{check-circle}**     | **{check-circle}**     |
+| Snowplow Micro                               | **{check-circle}** | **{check-circle}**  | **{check-circle}**            | **{dotted-circle}**    | **{dotted-circle}**    |
+| Snowplow Mini                                | **{check-circle}** | **{check-circle}**  | **{dotted-circle}**           | **{status_preparing}** | **{status_preparing}** |
+
+**Legend**
+
+**{check-circle}** Available, **{status_preparing}** In progress, **{dotted-circle}** Not Planned
+
+### Test frontend events
+
+To test frontend events in development:
+
+- [Enable Snowplow tracking in the Admin Area](index.md#enable-snowplow-tracking).
+- Turn off any ad blockers that would prevent Snowplow JS from loading in your environment.
+- Turn off "Do Not Track" (DNT) in your browser.
+
+#### Snowplow Analytics Debugger Chrome Extension
+
+Snowplow Analytics Debugger is a browser extension for testing frontend events. This works on production, staging, and local development environments.
+
+1. Install the [Snowplow Analytics Debugger](https://chrome.google.com/webstore/detail/snowplow-analytics-debugg/jbnlcgeengmijcghameodeaenefieedm) Chrome browser extension.
+1. Open Chrome DevTools to the Snowplow Analytics Debugger tab.
+1. Learn more at [Igloo Analytics](https://www.iglooanalytics.com/blog/snowplow-analytics-debugger-chrome-extension.html).
+
+#### Snowplow Inspector Chrome Extension
+
+Snowplow Inspector Chrome Extension is a browser extension for testing frontend events. This works on production, staging and local development environments.
+
+1. Install [Snowplow Inspector](https://chrome.google.com/webstore/detail/snowplow-inspector/maplkdomeamdlngconidoefjpogkmljm?hl=en).
+1. Open the Chrome extension by pressing the Snowplow Inspector icon beside the address bar.
+1. Click around on a webpage with Snowplow and you should see JavaScript events firing in the inspector window.
+
+### Snowplow Micro
+
+Snowplow Micro is a very small version of a full Snowplow data collection pipeline: small enough that it can be launched by a test suite. Events can be recorded into Snowplow Micro just as they can a full Snowplow pipeline. Micro then exposes an API that can be queried.
+
+Snowplow Micro is a Docker-based solution for testing frontend and backend events in a local development environment. You must modify GDK using the instructions below to set this up.
+
+- Read [Introducing Snowplow Micro](https://snowplowanalytics.com/blog/2019/07/17/introducing-snowplow-micro/)
+- Look at the [Snowplow Micro repository](https://github.com/snowplow-incubator/snowplow-micro)
+- Watch our <i class="fa fa-youtube-play youtube" aria-hidden="true"></i> [installation guide recording](https://www.youtube.com/watch?v=OX46fo_A0Ag)
+
+1. Ensure Docker is installed and running.
+
+1. Install [Snowplow Micro](https://github.com/snowplow-incubator/snowplow-micro) by cloning the settings in [this project](https://gitlab.com/gitlab-org/snowplow-micro-configuration):
+1. Navigate to the directory with the cloned project, and start the appropriate Docker
+   container with the following script:
+
+   ```shell
+   ./snowplow-micro.sh
+   ```
+
+1. Use GDK to start the PostgreSQL terminal and connect to the `gitlabhq_development` database:
+
+   ```shell
+   gdk psql -d gitlabhq_development
+   ```
+
+1. Update your instance's settings to enable Snowplow events and point to the Snowplow Micro collector:
+
+   ```shell
+   update application_settings set snowplow_collector_hostname='localhost:9090', snowplow_enabled=true, snowplow_cookie_domain='.gitlab.com';
+   ```
+
+1. Update `DEFAULT_SNOWPLOW_OPTIONS` in `app/assets/javascripts/tracking/constants.js` to remove `forceSecureTracker: true`:
+
+   ```diff
+   diff --git a/app/assets/javascripts/tracking/constants.js b/app/assets/javascripts/tracking/constants.js
+   index 598111e4086..eff38074d4c 100644
+   --- a/app/assets/javascripts/tracking/constants.js
+   +++ b/app/assets/javascripts/tracking/constants.js
+   @@ -7,7 +7,6 @@ export const DEFAULT_SNOWPLOW_OPTIONS = {
+      appId: '',
+      userFingerprint: false,
+      respectDoNotTrack: true,
+   -  forceSecureTracker: true,
+      eventMethod: 'post',
+      contexts: { webPage: true, performanceTiming: true },
+      formTracking: false,
+   ```
+
+1. Update `options` in `lib/gitlab/tracking.rb` to add `protocol` and `port`:
+
+   ```diff
+   diff --git a/lib/gitlab/tracking.rb b/lib/gitlab/tracking.rb
+   index 618e359211b..e9084623c43 100644
+   --- a/lib/gitlab/tracking.rb
+   +++ b/lib/gitlab/tracking.rb
+   @@ -41,7 +41,9 @@ def options(group)
+              cookie_domain: Gitlab::CurrentSettings.snowplow_cookie_domain,
+              app_id: Gitlab::CurrentSettings.snowplow_app_id,
+              form_tracking: additional_features,
+   -          link_click_tracking: additional_features
+   +          link_click_tracking: additional_features,
+   +          protocol: 'http',
+   +          port: 9090
+            }.transform_keys! { |key| key.to_s.camelize(:lower).to_sym }
+          end
+   ```
+
+1. Update `emitter` in `lib/gitlab/tracking/destinations/snowplow.rb` to change `protocol`:
+
+   ```diff
+   diff --git a/lib/gitlab/tracking/destinations/snowplow.rb b/lib/gitlab/tracking/destinations/snowplow.rb
+   index 4fa844de325..5dd9d0eacfb 100644
+   --- a/lib/gitlab/tracking/destinations/snowplow.rb
+   +++ b/lib/gitlab/tracking/destinations/snowplow.rb
+   @@ -40,7 +40,7 @@ def tracker
+            def emitter
+              SnowplowTracker::AsyncEmitter.new(
+                Gitlab::CurrentSettings.snowplow_collector_hostname,
+   -            protocol: 'https'
+   +            protocol: 'http'
+              )
+            end
+          end
+
+   ```
+
+1. Restart GDK:
+
+   ```shell
+   gdk restart
+   ```
+
+1. Send a test Snowplow event from the Rails console:
+
+   ```ruby
+   Gitlab::Tracking.event('category', 'action')
+   ```
+
+1. Navigate to `localhost:9090/micro/good` to see the event.
+
+### Snowplow Mini
+
+[Snowplow Mini](https://github.com/snowplow/snowplow-mini) is an easily-deployable, single-instance version of Snowplow.
+
+Snowplow Mini can be used for testing frontend and backend events on a production, staging and local development environment.
+
+For GitLab.com, we're setting up a [QA and Testing environment](https://gitlab.com/gitlab-org/telemetry/-/issues/266) using Snowplow Mini.
+
+### Troubleshooting
+
+To control content security policy warnings when using an external host, you can allow or disallow them by modifying `config/gitlab.yml`. To allow them, add the relevant host for `connect_src`. For example, for `https://snowplow.trx.gitlab.net`:
+
+```yaml
+development:
+  <<: *base
+  gitlab:
+    content_security_policy:
+      enabled: true
+      directives:
+        connect_src: "'self' http://localhost:* http://127.0.0.1:* ws://localhost:* wss://localhost:* ws://127.0.0.1:* https://snowplow.trx.gitlab.net/"
+```
diff --git a/doc/development/snowplow/index.md b/doc/development/snowplow/index.md
index a5c4938afb1..313a62ec6c8 100644
--- a/doc/development/snowplow/index.md
+++ b/doc/development/snowplow/index.md
@@ -6,7 +6,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 # Snowplow Guide
 
-This guide provides an overview of how Snowplow works, and implementation details.
+This guide provides an overview of how Snowplow works.
 
 For more information about Product Intelligence, see:
 
@@ -157,666 +157,10 @@ LIMIT 20
 
 Snowplow JS adds [web-specific parameters](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/snowplow-tracker-protocol/#Web-specific_parameters) to all web events by default.
 
-## Snowplow JavaScript frontend tracking
+## Implement Snowplow tracking
 
-GitLab provides a `Tracking` interface that wraps the [Snowplow JavaScript tracker](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/javascript-trackers/) to track custom events. For the recommended implementation type, see [Usage recommendations](#usage-recommendations).
+See the [Implementation](implementation.md) guide.
 
-Tracking implementations must have an `action` and a `category`. You can provide additional [structured event taxonomy](#structured-event-taxonomy) categories with an `extra` object that accepts key-value pairs.
+## Snowplow schemas
 
-| Field      | Type   | Default value              | Description                                                                                                                                                                                                    |
-|:-----------|:-------|:---------------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| `category` | string | `document.body.dataset.page` | Page or subsection of a page in which events are captured.                                                                                                                                            |
-| `action`   | string | generic                  | Action the user is taking. Clicks must be `click` and activations must be `activate`. For example, focusing a form field is `activate_form_input`, and clicking a button is `click_button`. |
-| `data`     | object | `{}`                         | Additional data such as `label`, `property`, `value`, `context` as described in [Structured event taxonomy](#structured-event-taxonomy), and `extra` (key-value pairs object). |
-
-### Usage recommendations
-
-- Use [data attributes](#implement-data-attribute-tracking) on HTML elements that emit `click`, `show.bs.dropdown`, or `hide.bs.dropdown` events.
-- Use the [Vue mixin](#implement-vue-component-tracking) for tracking custom events, or if the supported events for data attributes are not propagating. 
-- Use the [tracking class](#implement-raw-javascript-tracking) when tracking raw JavaScript files.
-
-### Implement data attribute tracking
-
-To implement tracking for HAML or Vue templates, add a [`data-track` attribute](#data-track-attributes) to the element.
-
-The following example shows `data-track-*` attributes assigned to a button:
-
-```haml
-%button.btn{ data: { track: { action: "click_button", label: "template_preview", property: "my-template" } } }
-```
-
-```html
-<button class="btn"
-  data-track-action="click_button"
-  data-track-label="template_preview"
-  data-track-property="my-template"
-  data-track-extra='{ "template_variant": "primary" }'
-/>
-```
-
-#### `data-track` attributes
-
-| Attribute             | Required | Description |
-|:----------------------|:---------|:------------|
-| `data-track-action`    | true     | Action the user is taking. Clicks must be prepended with `click` and activations must be prepended with `activate`. For example, focusing a form field is `activate_form_input` and clicking a button is `click_button`. Replaces `data-track-event`, which was [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/290962) in GitLab 13.11. |
-| `data-track-label`    | false    | The `label` as described in [structured event taxonomy](#structured-event-taxonomy). |
-| `data-track-property` | false    | The `property` as described in [structured event taxonomy](#structured-event-taxonomy). |
-| `data-track-value`    | false    | The `value` as described in [structured event taxonomy](#structured-event-taxonomy). If omitted, this is the element's `value` property or `undefined`. For checkboxes, the default value is the element's checked attribute or `0` when unchecked. |
-| `data-track-extra` | false    | A key-value pairs object passed as a valid JSON string. This is added to the `extra` property in our [`gitlab_standard`](#gitlab_standard) schema. |
-| `data-track-context`  | false    | The `context` as described in our [Structured event taxonomy](#structured-event-taxonomy). |
-
-#### Event listeners
-
-Event listeners are bound at the document level to handle click events in elements with data attributes. This allows them to be handled on re-rendering and changes to the DOM. Because of the way these events are bound, click events should not stop from propagating up the DOM tree. If click events are stopped from propagating, you must implement listeners and follow the instructions in [Implement Vue component tracking](#implement-vue-component-tracking) or [Implement raw JavaScript tracking](#implement-raw-javascript-tracking).
-
-#### Available helpers
-
-```ruby
-tracking_attrs(label, action, property) # { data: { track_label... } }
-
-%button{ **tracking_attrs('main_navigation', 'click_button', 'navigation') }
-```
-
-#### Caveats
-
-When using the GitLab helper method [`nav_link`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/helpers/tab_helper.rb#L76) be sure to wrap `html_options` under the `html_options` keyword argument.
-Be careful, as this behavior can be confused with the `ActionView` helper method [`link_to`](https://api.rubyonrails.org/v5.2.3/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to) that does not require additional wrapping of `html_options`
-
-```ruby
-# Bad
-= nav_link(controller: ['dashboard/groups', 'explore/groups'], data: { track_label: "explore_groups", track_action: "click_button" })
-
-# Good
-= nav_link(controller: ['dashboard/groups', 'explore/groups'], html_options: { data: { track_label: "explore_groups", track_action: "click_button" } })
-
-# Good (other helpers)
-= link_to explore_groups_path, title: _("Explore"), data: { track_label: "explore_groups", track_action: "click_button" }
-```
-
-### Implement Vue component tracking
-
-For custom event tracking, use a Vue `mixin` in components. Vue `mixin` exposes the `Tracking.event` static method and the `track` method called from components or templates. You can specify tracking options in `data` or `computed`. These options override any defaults and allow the values to be dynamic from props or based on state. 
-
-Default options are passed when an event is tracked from the component. If you don't specify an option, the default `document.body.dataset.page` is used. The default options are: 
-
-- `category`
-- `label`
-- `property` 
-- `value`
-
-To implement Vue component tracking:
-
-1. Import the `Tracking` library and request a `mixin`:
-
-    ```javascript
-    import Tracking from '~/tracking';
-    const trackingMixin = Tracking.mixin;
-    ```
-
-1. Provide categories to track the event from the component. For example, to track all events in a component with a label, use the `label` category:
-
-    ```javascript
-    import Tracking from '~/tracking';
-    const trackingMixin = Tracking.mixin({ label: 'right_sidebar' });
-    ```
-
-1. In the component, declare the Vue `mixin`.
-
-    ```javascript
-    export default {
-      mixins: [trackingMixin],
-      // ...[component implementation]...
-      data() {
-        return {
-          expanded: false,
-          tracking: {
-            label: 'left_sidebar',
-          },
-        };
-      },
-    };
-    ```
-
-1. To receive event data as a tracking object or computed property: 
-   - Declare it in the `data` function. Use a `tracking` object when default event properties are dynamic or provided at runtime:
-
-      ```javascript
-      export default {
-        name: 'RightSidebar',
-        mixins: [Tracking.mixin()],
-        data() {
-          return {
-            tracking: {
-              label: 'right_sidebar',
-              // category: '',
-              // property: '',
-              // value: '',
-              // experiment: '',
-              // extra: {},
-            },
-          };
-        },
-      };
-      ```
-
-   - Declare it in the event data in the `track` function. This object merges with any previously provided options:
-
-      ```javascript
-      this.track('click_button', {
-        label: 'right_sidebar',
-      });
-      ```
-
-1. Optional. Use the `track` method in a template:
-
-    ```html
-    <template>
-      <div>
-        <button data-testid="toggle" @click="toggle">Toggle</button>
-
-        <div v-if="expanded">
-          <p>Hello world!</p>
-          <button @click="track('click_action')">Track another event</button>
-        </div>
-      </div>
-    </template>
-    ```
-
-#### Implementation example
-
-```javascript
-export default {
-  name: 'RightSidebar',
-  mixins: [Tracking.mixin({ label: 'right_sidebar' })],
-  data() {
-    return {
-      expanded: false,
-    };
-  },
-  methods: {
-    toggle() {
-      this.expanded = !this.expanded;
-      // Additional data will be merged, like `value` below
-      this.track('click_toggle', { value: Number(this.expanded) });
-    }
-  }
-};
-```
-
-#### Testing example
-
-```javascript
-import { mockTracking } from 'helpers/tracking_helper';
-// mockTracking(category, documentOverride, spyMethod)
-
-describe('RightSidebar.vue', () => {
-  let trackingSpy;
-  let wrapper;
-
-  beforeEach(() => {
-    trackingSpy = mockTracking(undefined, wrapper.element, jest.spyOn);
-  });
-
-  const findToggle = () => wrapper.find('[data-testid="toggle"]');
-
-  it('tracks turning off toggle', () => {
-    findToggle().trigger('click');
-
-    expect(trackingSpy).toHaveBeenCalledWith(undefined, 'click_toggle', {
-      label: 'right_sidebar',
-      value: 0,
-    });
-  });
-});
-```
-
-### Implement raw JavaScript tracking
-
-To call custom event tracking and instrumentation directly from the JavaScript file, call the `Tracking.event` static function. 
-
-The following example demonstrates tracking a click on a button by manually calling `Tracking.event`.
-
-```javascript
-import Tracking from '~/tracking';
-
-const button = document.getElementById('create_from_template_button');
-
-button.addEventListener('click', () => {
-  Tracking.event('dashboard:projects:index', 'click_button', {
-    label: 'create_from_template',
-    property: 'template_preview',
-    extra: {
-      templateVariant: 'primary',
-      valid: 1,
-    },
-  });
-});
-```
-
-#### Testing example
-
-```javascript
-import Tracking from '~/tracking';
-
-describe('MyTracking', () => {
-  let wrapper;
-
-  beforeEach(() => {
-    jest.spyOn(Tracking, 'event');
-  });
-
-  const findButton = () => wrapper.find('[data-testid="create_from_template"]');
-
-  it('tracks event', () => {
-    findButton().trigger('click');
-
-    expect(Tracking.event).toHaveBeenCalledWith(undefined, 'click_button', {
-      label: 'create_from_template',
-      property: 'template_preview',
-      extra: {
-        templateVariant: 'primary',
-        valid: true,
-      },
-    });
-  });
-});
-```
-
-### Form tracking
-
-Enable Snowplow automatic [form tracking](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/javascript-trackers/javascript-tracker/javascript-tracker-v2/tracking-specific-events/#form-tracking) by calling `Tracking.enableFormTracking` (after the DOM is ready) and providing a `config` object that includes at least one of the following elements:
-
-- `forms`: determines which forms are tracked, and are identified by the CSS class name.
-- `fields`: determines which fields inside the tracked forms are tracked, and are identified by the field `name`.
-
-An optional list of contexts can be provided as the second argument.
-Note that our [`gitlab_standard`](#gitlab_standard) schema is excluded from these events.
-
-```javascript
-Tracking.enableFormTracking({
-  forms: { allow: ['sign-in-form', 'password-recovery-form'] },
-  fields: { allow: ['terms_and_conditions', 'newsletter_agreement'] },
-});
-```
-
-#### Testing example
-
-```javascript
-import Tracking from '~/tracking';
-
-describe('MyFormTracking', () => {
-  let formTrackingSpy;
-
-  beforeEach(() => {
-    formTrackingSpy = jest
-      .spyOn(Tracking, 'enableFormTracking')
-      .mockImplementation(() => null);
-  });
-
-  it('initialized with the correct configuration', () => {
-    expect(formTrackingSpy).toHaveBeenCalledWith({
-      forms: { allow: ['sign-in-form', 'password-recovery-form'] },
-      fields: { allow: ['terms_and_conditions', 'newsletter_agreement'] },
-    });
-  });
-});
-```
-
-## Implement Snowplow Ruby (Backend) tracking
-
-GitLab provides `Gitlab::Tracking`, an interface that wraps the [Snowplow Ruby Tracker](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/ruby-tracker/) for tracking custom events.
-
-Custom event tracking and instrumentation can be added by directly calling the `GitLab::Tracking.event` class method, which accepts the following arguments:
-
-| argument   | type                      | default value | description                                                                                                                       |
-|------------|---------------------------|---------------|-----------------------------------------------------------------------------------------------------------------------------------|
-| `category` | String                    |               | Area or aspect of the application. This could be `HealthCheckController` or `Lfs::FileTransformer` for instance.                  |
-| `action`   | String                    |               | The action being taken, which can be anything from a controller action like `create` to something like an Active Record callback. |
-| `label`    | String                    | nil           | As described in [Structured event taxonomy](#structured-event-taxonomy).                                                          |
-| `property` | String                    | nil           | As described in [Structured event taxonomy](#structured-event-taxonomy).                                                          |
-| `value`    | Numeric                   | nil           | As described in [Structured event taxonomy](#structured-event-taxonomy).                                                          |
-| `context`  | Array\[SelfDescribingJSON\] | nil           | An array of custom contexts to send with this event. Most events should not have any custom contexts.                             |
-| `project`  | Project                   | nil           | The project associated with the event. |
-| `user`     | User                      | nil           | The user associated with the event. |
-| `namespace` | Namespace                | nil           | The namespace associated with the event. |
-| `extra`   | Hash                | `{}`         | Additional keyword arguments are collected into a hash and sent with the event. |
-
-Tracking can be viewed as either tracking user behavior, or can be used for instrumentation to monitor and visualize performance over time in an area or aspect of code.
-
-For example:
-
-```ruby
-class Projects::CreateService < BaseService
-  def execute
-    project = Project.create(params)
-
-    Gitlab::Tracking.event('Projects::CreateService', 'create_project', label: project.errors.full_messages.to_sentence,
-                           property: project.valid?.to_s, project: project, user: current_user, namespace: namespace)
-  end
-end
-```
-
-### Unit testing
-
-Use the `expect_snowplow_event` helper when testing backend Snowplow events. See [testing best practices](
-https://docs.gitlab.com/ee/development/testing_guide/best_practices.html#test-snowplow-events) for details.
-
-### Performance
-
-We use the [AsyncEmitter](https://docs.snowplowanalytics.com/docs/collecting-data/collecting-from-own-applications/ruby-tracker/emitters/#the-asyncemitter-class) when tracking events, which allows for instrumentation calls to be run in a background thread. This is still an active area of development.
-
-## Develop and test Snowplow
-
-There are several tools for developing and testing a Snowplow event.
-
-| Testing Tool                                 | Frontend Tracking  | Backend Tracking    | Local Development Environment | Production Environment | Production Environment |
-|----------------------------------------------|--------------------|---------------------|-------------------------------|------------------------|------------------------|
-| Snowplow Analytics Debugger Chrome Extension | **{check-circle}** | **{dotted-circle}** | **{check-circle}**            | **{check-circle}**     | **{check-circle}**     |
-| Snowplow Inspector Chrome Extension          | **{check-circle}** | **{dotted-circle}** | **{check-circle}**            | **{check-circle}**     | **{check-circle}**     |
-| Snowplow Micro                               | **{check-circle}** | **{check-circle}**  | **{check-circle}**            | **{dotted-circle}**    | **{dotted-circle}**    |
-| Snowplow Mini                                | **{check-circle}** | **{check-circle}**  | **{dotted-circle}**           | **{status_preparing}** | **{status_preparing}** |
-
-**Legend**
-
-**{check-circle}** Available, **{status_preparing}** In progress, **{dotted-circle}** Not Planned
-
-### Test frontend events
-
-To test frontend events in development:
-
-- [Enable Snowplow tracking in the Admin Area](#enable-snowplow-tracking).
-- Turn off any ad blockers that would prevent Snowplow JS from loading in your environment.
-- Turn off "Do Not Track" (DNT) in your browser.
-
-#### Snowplow Analytics Debugger Chrome Extension
-
-Snowplow Analytics Debugger is a browser extension for testing frontend events. This works on production, staging, and local development environments.
-
-1. Install the [Snowplow Analytics Debugger](https://chrome.google.com/webstore/detail/snowplow-analytics-debugg/jbnlcgeengmijcghameodeaenefieedm) Chrome browser extension.
-1. Open Chrome DevTools to the Snowplow Analytics Debugger tab.
-1. Learn more at [Igloo Analytics](https://www.iglooanalytics.com/blog/snowplow-analytics-debugger-chrome-extension.html).
-
-#### Snowplow Inspector Chrome Extension
-
-Snowplow Inspector Chrome Extension is a browser extension for testing frontend events. This works on production, staging and local development environments.
-
-1. Install [Snowplow Inspector](https://chrome.google.com/webstore/detail/snowplow-inspector/maplkdomeamdlngconidoefjpogkmljm?hl=en).
-1. Open the Chrome extension by pressing the Snowplow Inspector icon beside the address bar.
-1. Click around on a webpage with Snowplow and you should see JavaScript events firing in the inspector window.
-
-### Snowplow Micro
-
-Snowplow Micro is a very small version of a full Snowplow data collection pipeline: small enough that it can be launched by a test suite. Events can be recorded into Snowplow Micro just as they can a full Snowplow pipeline. Micro then exposes an API that can be queried.
-
-Snowplow Micro is a Docker-based solution for testing frontend and backend events in a local development environment. You must modify GDK using the instructions below to set this up.
-
-- Read [Introducing Snowplow Micro](https://snowplowanalytics.com/blog/2019/07/17/introducing-snowplow-micro/)
-- Look at the [Snowplow Micro repository](https://github.com/snowplow-incubator/snowplow-micro)
-- Watch our <i class="fa fa-youtube-play youtube" aria-hidden="true"></i> [installation guide recording](https://www.youtube.com/watch?v=OX46fo_A0Ag)
-
-1. Ensure Docker is installed and running.
-
-1. Install [Snowplow Micro](https://github.com/snowplow-incubator/snowplow-micro) by cloning the settings in [this project](https://gitlab.com/gitlab-org/snowplow-micro-configuration):
-1. Navigate to the directory with the cloned project, and start the appropriate Docker
-   container with the following script:
-
-   ```shell
-   ./snowplow-micro.sh
-   ```
-
-1. Use GDK to start the PostgreSQL terminal and connect to the `gitlabhq_development` database:
-
-   ```shell
-   gdk psql -d gitlabhq_development
-   ```
-
-1. Update your instance's settings to enable Snowplow events and point to the Snowplow Micro collector:
-
-   ```shell
-   update application_settings set snowplow_collector_hostname='localhost:9090', snowplow_enabled=true, snowplow_cookie_domain='.gitlab.com';
-   ```
-
-1. Update `DEFAULT_SNOWPLOW_OPTIONS` in `app/assets/javascripts/tracking/constants.js` to remove `forceSecureTracker: true`:
-
-   ```diff
-   diff --git a/app/assets/javascripts/tracking/constants.js b/app/assets/javascripts/tracking/constants.js
-   index 598111e4086..eff38074d4c 100644
-   --- a/app/assets/javascripts/tracking/constants.js
-   +++ b/app/assets/javascripts/tracking/constants.js
-   @@ -7,7 +7,6 @@ export const DEFAULT_SNOWPLOW_OPTIONS = {
-      appId: '',
-      userFingerprint: false,
-      respectDoNotTrack: true,
-   -  forceSecureTracker: true,
-      eventMethod: 'post',
-      contexts: { webPage: true, performanceTiming: true },
-      formTracking: false,
-   ```
-
-1. Update `options` in `lib/gitlab/tracking.rb` to add `protocol` and `port`:
-
-   ```diff
-   diff --git a/lib/gitlab/tracking.rb b/lib/gitlab/tracking.rb
-   index 618e359211b..e9084623c43 100644
-   --- a/lib/gitlab/tracking.rb
-   +++ b/lib/gitlab/tracking.rb
-   @@ -41,7 +41,9 @@ def options(group)
-              cookie_domain: Gitlab::CurrentSettings.snowplow_cookie_domain,
-              app_id: Gitlab::CurrentSettings.snowplow_app_id,
-              form_tracking: additional_features,
-   -          link_click_tracking: additional_features
-   +          link_click_tracking: additional_features,
-   +          protocol: 'http',
-   +          port: 9090
-            }.transform_keys! { |key| key.to_s.camelize(:lower).to_sym }
-          end
-   ```
-
-1. Update `emitter` in `lib/gitlab/tracking/destinations/snowplow.rb` to change `protocol`:
-
-   ```diff
-   diff --git a/lib/gitlab/tracking/destinations/snowplow.rb b/lib/gitlab/tracking/destinations/snowplow.rb
-   index 4fa844de325..5dd9d0eacfb 100644
-   --- a/lib/gitlab/tracking/destinations/snowplow.rb
-   +++ b/lib/gitlab/tracking/destinations/snowplow.rb
-   @@ -40,7 +40,7 @@ def tracker
-            def emitter
-              SnowplowTracker::AsyncEmitter.new(
-                Gitlab::CurrentSettings.snowplow_collector_hostname,
-   -            protocol: 'https'
-   +            protocol: 'http'
-              )
-            end
-          end
-
-   ```
-
-1. Restart GDK:
-
-   ```shell
-   gdk restart
-   ```
-
-1. Send a test Snowplow event from the Rails console:
-
-   ```ruby
-   Gitlab::Tracking.event('category', 'action')
-   ```
-
-1. Navigate to `localhost:9090/micro/good` to see the event.
-
-### Snowplow Mini
-
-[Snowplow Mini](https://github.com/snowplow/snowplow-mini) is an easily-deployable, single-instance version of Snowplow.
-
-Snowplow Mini can be used for testing frontend and backend events on a production, staging and local development environment.
-
-For GitLab.com, we're setting up a [QA and Testing environment](https://gitlab.com/gitlab-org/telemetry/-/issues/266) using Snowplow Mini.
-
-### Troubleshooting
-
-To control content security policy warnings when using an external host, you can allow or disallow them by modifying `config/gitlab.yml`. To allow them, add the relevant host for `connect_src`. For example, for `https://snowplow.trx.gitlab.net`:
-
-```yaml
-development:
-  <<: *base
-  gitlab:
-    content_security_policy:
-      enabled: true
-      directives:
-        connect_src: "'self' http://localhost:* http://127.0.0.1:* ws://localhost:* wss://localhost:* ws://127.0.0.1:* https://snowplow.trx.gitlab.net/"
-```
-
-## Snowplow Schemas
-
-### `gitlab_standard`
-
-We are including the [`gitlab_standard` schema](https://gitlab.com/gitlab-org/iglu/-/blob/master/public/schemas/com.gitlab/gitlab_standard/jsonschema/) with every event. See [Standardize Snowplow Schema](https://gitlab.com/groups/gitlab-org/-/epics/5218) for details.
-
-The [`StandardContext`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/tracking/standard_context.rb) class represents this schema in the application.
-
-| Field Name     | Required            | Type                  | Description                                                                                 |
-|----------------|---------------------|-----------------------|---------------------------------------------------------------------------------------------|
-| `project_id`   | **{dotted-circle}** | integer               |                                                                 |
-| `namespace_id` | **{dotted-circle}** | integer               |                                                               |
-| `environment`  | **{check-circle}**  | string (max 32 chars) | Name of the source environment, such as `production` or `staging`             |
-| `source`       | **{check-circle}**  | string (max 32 chars) | Name of the source application, such as  `gitlab-rails` or `gitlab-javascript` |
-| `plan`         | **{dotted-circle}**  | string (max 32 chars) | Name of the plan for the namespace, such as `free`, `premium`, or `ultimate`. Automatically picked from the `namespace`. |
-| `extra`        | **{dotted-circle}**  | JSON                  | Any additional data associated with the event, in the form of key-value pairs |
-
-### Default Schema
-
-| Field Name               | Required            | Type      | Description                                                                                                                      |
-|--------------------------|---------------------|-----------|----------------------------------------------------------------------------------------------------------------------------------|
-| `app_id`                   | **{check-circle}**  | string    | Unique identifier for website / application                                                                                      |
-| `base_currency`            | **{dotted-circle}** | string    | Reporting currency                                                                                                               |
-| `br_colordepth`            | **{dotted-circle}** | integer   | Browser color depth                                                                                                              |
-| `br_cookies`               | **{dotted-circle}** | boolean   | Does the browser permit cookies?                                                                                                 |
-| `br_family`                | **{dotted-circle}** | string    | Browser family                                                                                                                   |
-| `br_features_director`     | **{dotted-circle}** | boolean   | Director plugin installed?                                                                                                       |
-| `br_features_flash`        | **{dotted-circle}** | boolean   | Flash plugin installed?                                                                                                          |
-| `br_features_gears`        | **{dotted-circle}** | boolean   | Google gears installed?                                                                                                          |
-| `br_features_java`         | **{dotted-circle}** | boolean   | Java plugin installed?                                                                                                           |
-| `br_features_pdf`          | **{dotted-circle}** | boolean   | Adobe PDF plugin installed?                                                                                                      |
-| `br_features_quicktime`    | **{dotted-circle}** | boolean   | Quicktime plugin installed?                                                                                                      |
-| `br_features_realplayer`   | **{dotted-circle}** | boolean   | RealPlayer plugin installed?                                                                                                     |
-| `br_features_silverlight`  | **{dotted-circle}** | boolean   | Silverlight plugin installed?                                                                                                    |
-| `br_features_windowsmedia` | **{dotted-circle}** | boolean   | Windows media plugin installed?                                                                                                  |
-| `br_lang`                  | **{dotted-circle}** | string    | Language the browser is set to                                                                                                   |
-| `br_name`                  | **{dotted-circle}** | string    | Browser name                                                                                                                     |
-| `br_renderengine`          | **{dotted-circle}** | string    | Browser rendering engine                                                                                                         |
-| `br_type`                  | **{dotted-circle}** | string    | Browser type                                                                                                                     |
-| `br_version`               | **{dotted-circle}** | string    | Browser version                                                                                                                  |
-| `br_viewheight`            | **{dotted-circle}** | string    | Browser viewport height                                                                                                          |
-| `br_viewwidth`             | **{dotted-circle}** | string    | Browser viewport width                                                                                                           |
-| `collector_tstamp`         | **{dotted-circle}** | timestamp | Time stamp for the event recorded by the collector                                                                               |
-| `contexts`                 | **{dotted-circle}** |           |                                                                                                                                  |
-| `derived_contexts`         | **{dotted-circle}** |           | Contexts derived in the Enrich process                                                                                           |
-| `derived_tstamp`           | **{dotted-circle}** | timestamp | Timestamp making allowance for inaccurate device clock                                                                          |
-| `doc_charset`              | **{dotted-circle}** | string    | Web page's character encoding                                                                                                    |
-| `doc_height`               | **{dotted-circle}** | string    | Web page height                                                                                                                  |
-| `doc_width`                | **{dotted-circle}** | string    | Web page width                                                                                                                   |
-| `domain_sessionid`         | **{dotted-circle}** | string    | Unique identifier (UUID) for this visit of this user_id to this domain                                                           |
-| `domain_sessionidx`        | **{dotted-circle}** | integer   | Index of number of visits that this user_id has made to this domain (The first visit is `1`)                                        |
-| `domain_userid`            | **{dotted-circle}** | string    | Unique identifier for a user, based on a first party cookie (so domain specific)                                                 |
-| `dvce_created_tstamp`      | **{dotted-circle}** | timestamp | Timestamp when event occurred, as recorded by client device                                                                      |
-| `dvce_ismobile`            | **{dotted-circle}** | boolean   | Indicates whether device is mobile                                                                                               |
-| `dvce_screenheight`        | **{dotted-circle}** | string    | Screen / monitor resolution                                                                                                      |
-| `dvce_screenwidth`         | **{dotted-circle}** | string    | Screen / monitor resolution                                                                                                      |
-| `dvce_sent_tstamp`         | **{dotted-circle}** | timestamp | Timestamp when event was sent by client device to collector                                                                      |
-| `dvce_type`                | **{dotted-circle}** | string    | Type of device                                                                                                                   |
-| `etl_tags`                 | **{dotted-circle}** | string    | JSON of tags for this ETL run                                                                                                    |
-| `etl_tstamp`               | **{dotted-circle}** | timestamp | Timestamp event began ETL                                                                                                        |
-| `event`                    | **{dotted-circle}** | string    | Event type                                                                                                                       |
-| `event_fingerprint`        | **{dotted-circle}** | string    | Hash client-set event fields                                                                                                     |
-| `event_format`             | **{dotted-circle}** | string    | Format for event                                                                                                                 |
-| `event_id`                 | **{dotted-circle}** | string    | Event UUID                                                                                                                       |
-| `event_name`               | **{dotted-circle}** | string    | Event name                                                                                                                       |
-| `event_vendor`             | **{dotted-circle}** | string    | The company who developed the event model                                                                                        |
-| `event_version`            | **{dotted-circle}** | string    | Version of event schema                                                                                                          |
-| `geo_city`                 | **{dotted-circle}** | string    | City of IP origin                                                                                                                |
-| `geo_country`              | **{dotted-circle}** | string    | Country of IP origin                                                                                                             |
-| `geo_latitude`             | **{dotted-circle}** | string    | An approximate latitude                                                                                                          |
-| `geo_longitude`            | **{dotted-circle}** | string    | An approximate longitude                                                                                                         |
-| `geo_region`               | **{dotted-circle}** | string    | Region of IP origin                                                                                                              |
-| `geo_region_name`          | **{dotted-circle}** | string    | Region of IP origin                                                                                                              |
-| `geo_timezone`             | **{dotted-circle}** | string    | Time zone of IP origin                                                                                                            |
-| `geo_zipcode`              | **{dotted-circle}** | string    | Zip (postal) code of IP origin                                                                                                   |
-| `ip_domain`                | **{dotted-circle}** | string    | Second level domain name associated with the visitor's IP address                                                                |
-| `ip_isp`                   | **{dotted-circle}** | string    | Visitor's ISP                                                                                                                    |
-| `ip_netspeed`              | **{dotted-circle}** | string    | Visitor's connection type                                                                                                        |
-| `ip_organization`          | **{dotted-circle}** | string    | Organization associated with the visitor's IP address – defaults to ISP name if none is found                                    |
-| `mkt_campaign`             | **{dotted-circle}** | string    | The campaign ID                                                                                                                  |
-| `mkt_clickid`              | **{dotted-circle}** | string    | The click ID                                                                                                                     |
-| `mkt_content`              | **{dotted-circle}** | string    | The content or ID of the ad.                                                                   |
-| `mkt_medium`               | **{dotted-circle}** | string    | Type of traffic source                                                                                                           |
-| `mkt_network`              | **{dotted-circle}** | string    | The ad network to which the click ID belongs                                                                                     |
-| `mkt_source`               | **{dotted-circle}** | string    | The company / website where the traffic came from                                                                                |
-| `mkt_term`                 | **{dotted-circle}** | string    | Keywords associated with the referrer                                                                                        |
-| `name_tracker`             | **{dotted-circle}** | string    | The tracker namespace                                                                                                            |
-| `network_userid`           | **{dotted-circle}** | string    | Unique identifier for a user, based on a cookie from the collector (so set at a network level and shouldn't be set by a tracker) |
-| `os_family`                | **{dotted-circle}** | string    | Operating system family                                                                                                          |
-| `os_manufacturer`          | **{dotted-circle}** | string    | Manufacturers of operating system                                                                                                |
-| `os_name`                  | **{dotted-circle}** | string    | Name of operating system                                                                                                         |
-| `os_timezone`              | **{dotted-circle}** | string    | Client operating system time zone                                                                                                 |
-| `page_referrer`            | **{dotted-circle}** | string    | Referrer URL                                                                                                                     |
-| `page_title`               | **{dotted-circle}** | string    | Page title                                                                                                                       |
-| `page_url`                 | **{dotted-circle}** | string    | Page URL                                                                                                                         |
-| `page_urlfragment`         | **{dotted-circle}** | string    | Fragment aka anchor                                                                                                              |
-| `page_urlhost`             | **{dotted-circle}** | string    | Host aka domain                                                                                                                  |
-| `page_urlpath`             | **{dotted-circle}** | string    | Path to page                                                                                                                     |
-| `page_urlport`             | **{dotted-circle}** | integer   | Port if specified, 80 if not                                                                                                     |
-| `page_urlquery`            | **{dotted-circle}** | string    | Query string                                                                                                                      |
-| `page_urlscheme`           | **{dotted-circle}** | string    | Scheme (protocol name)                                                                                                              |
-| `platform`                 | **{dotted-circle}** | string    | The platform the app runs on                                                                                                     |
-| `pp_xoffset_max`           | **{dotted-circle}** | integer   | Maximum page x offset seen in the last ping period                                                                               |
-| `pp_xoffset_min`           | **{dotted-circle}** | integer   | Minimum page x offset seen in the last ping period                                                                               |
-| `pp_yoffset_max`           | **{dotted-circle}** | integer   | Maximum page y offset seen in the last ping period                                                                               |
-| `pp_yoffset_min`           | **{dotted-circle}** | integer   | Minimum page y offset seen in the last ping period                                                                               |
-| `refr_domain_userid`       | **{dotted-circle}** | string    | The Snowplow `domain_userid` of the referring website                                                                              |
-| `refr_dvce_tstamp`         | **{dotted-circle}** | timestamp | The time of attaching the `domain_userid` to the inbound link                                                                      |
-| `refr_medium`              | **{dotted-circle}** | string    | Type of referer                                                                                                                  |
-| `refr_source`              | **{dotted-circle}** | string    | Name of referer if recognised                                                                                                    |
-| `refr_term`                | **{dotted-circle}** | string    | Keywords if source is a search engine                                                                                            |
-| `refr_urlfragment`         | **{dotted-circle}** | string    | Referer URL fragment                                                                                                             |
-| `refr_urlhost`             | **{dotted-circle}** | string    | Referer host                                                                                                                     |
-| `refr_urlpath`             | **{dotted-circle}** | string    | Referer page path                                                                                                                |
-| `refr_urlport`             | **{dotted-circle}** | integer   | Referer port                                                                                                                     |
-| `refr_urlquery`            | **{dotted-circle}** | string    | Referer URL query string                                                                                                          |
-| `refr_urlscheme`           | **{dotted-circle}** | string    | Referer scheme                                                                                                                   |
-| `se_action`                | **{dotted-circle}** | string    | The action / event itself                                                                                                        |
-| `se_category`              | **{dotted-circle}** | string    | The category of event                                                                                                            |
-| `se_label`                 | **{dotted-circle}** | string    | A label often used to refer to the 'object' the action is performed on                                                           |
-| `se_property`              | **{dotted-circle}** | string    | A property associated with either the action or the object                                                                       |
-| `se_value`                 | **{dotted-circle}** | decimal   | A value associated with the user action                                                                                          |
-| `ti_category`              | **{dotted-circle}** | string    | Item category                                                                                                                    |
-| `ti_currency`              | **{dotted-circle}** | string    | Currency                                                                                                                         |
-| `ti_name`                  | **{dotted-circle}** | string    | Item name                                                                                                                        |
-| `ti_orderid`               | **{dotted-circle}** | string    | Order ID                                                                                                                         |
-| `ti_price`                 | **{dotted-circle}** | decimal   | Item price                                                                                                                       |
-| `ti_price_base`            | **{dotted-circle}** | decimal   | Item price in base currency                                                                                                      |
-| `ti_quantity`              | **{dotted-circle}** | integer   | Item quantity                                                                                                                    |
-| `ti_sku`                   | **{dotted-circle}** | string    | Item SKU                                                                                                                         |
-| `tr_affiliation`           | **{dotted-circle}** | string    | Transaction affiliation (such as channel)                                                                                           |
-| `tr_city`                  | **{dotted-circle}** | string    | Delivery address: city                                                                                                           |
-| `tr_country`               | **{dotted-circle}** | string    | Delivery address: country                                                                                                        |
-| `tr_currency`              | **{dotted-circle}** | string    | Transaction Currency                                                                                                             |
-| `tr_orderid`               | **{dotted-circle}** | string    | Order ID                                                                                                                         |
-| `tr_shipping`              | **{dotted-circle}** | decimal   | Delivery cost charged                                                                                                            |
-| `tr_shipping_base`         | **{dotted-circle}** | decimal   | Shipping cost in base currency                                                                                                   |
-| `tr_state`                 | **{dotted-circle}** | string    | Delivery address: state                                                                                                          |
-| `tr_tax`                   | **{dotted-circle}** | decimal   | Transaction tax value (such as amount of VAT included)                                                                              |
-| `tr_tax_base`              | **{dotted-circle}** | decimal   | Tax applied in base currency                                                                                                     |
-| `tr_total`                 | **{dotted-circle}** | decimal   | Transaction total value                                                                                                          |
-| `tr_total_base`            | **{dotted-circle}** | decimal   | Total amount of transaction in base currency                                                                                     |
-| `true_tstamp`              | **{dotted-circle}** | timestamp | User-set exact timestamp                                                                                                         |
-| `txn_id`                   | **{dotted-circle}** | string    | Transaction ID                                                                                                                   |
-| `unstruct_event`           | **{dotted-circle}** | JSON      | The properties of the event                                                                                                      |
-| `uploaded_at`              | **{dotted-circle}** |           |                                                                                                                                  |
-| `user_fingerprint`         | **{dotted-circle}** | integer   | User identifier based on (hopefully unique) browser features                                                                     |
-| `user_id`                  | **{dotted-circle}** | string    | Unique identifier for user, set by the business using setUserId                                                                  |
-| `user_ipaddress`           | **{dotted-circle}** | string    | IP address                                                                                                                       |
-| `useragent`                | **{dotted-circle}** | string    | User agent (expressed as a browser string)                                                                                                |
-| `v_collector`              | **{dotted-circle}** | string    | Collector version                                                                                                                |
-| `v_etl`                    | **{dotted-circle}** | string    | ETL version                                                                                                                      |
-| `v_tracker`                | **{dotted-circle}** | string    | Identifier for Snowplow tracker                                                                                                  |
+See the [Snowplow schemas](schemas.md) guide.
diff --git a/doc/development/snowplow/review_guidelines.md b/doc/development/snowplow/review_guidelines.md
index fa0985f6943..77e95ef8c16 100644
--- a/doc/development/snowplow/review_guidelines.md
+++ b/doc/development/snowplow/review_guidelines.md
@@ -26,18 +26,18 @@ events or touches Snowplow related files.
 #### The merge request **author** should
 
 - For frontend events, when relevant, add a screenshot of the event in
-  the [testing tool](../snowplow/index.md#develop-and-test-snowplow) used.
+  the [testing tool](implementation.md#develop-and-test-snowplow) used.
 - For backend events, when relevant, add the output of the
-  [Snowplow Micro](index.md#snowplow-mini) good events
+  [Snowplow Micro](implementation.md#snowplow-mini) good events
   `GET http://localhost:9090/micro/good` (it might be a good idea
   to reset with `GET http://localhost:9090/micro/reset` first).
 - Update the [Event Dictionary](event_dictionary_guide.md).
 
 #### The Product Intelligence **reviewer** should
 
-- Check that the [event taxonomy](../snowplow/index.md#structured-event-taxonomy) is correct.
-- Check the [usage recommendations](../snowplow/index.md#usage-recommendations).
+- Check that the [event taxonomy](index.md#structured-event-taxonomy) is correct.
+- Check the [usage recommendations](implementation.md#usage-recommendations).
 - Check that the [Event Dictionary](event_dictionary_guide.md) is up-to-date.
 - If needed, check that the events are firing locally using one of the
-[testing tools](../snowplow/index.md#develop-and-test-snowplow) available.
+[testing tools](implementation.md#develop-and-test-snowplow) available.
 - Approve the MR, and relabel the MR with `~"product intelligence::approved"`.
diff --git a/doc/development/snowplow/schemas.md b/doc/development/snowplow/schemas.md
new file mode 100644
index 00000000000..d5ecfd806f3
--- /dev/null
+++ b/doc/development/snowplow/schemas.md
@@ -0,0 +1,161 @@
+---
+stage: Growth
+group: Product Intelligence
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
+---
+
+# Snowplow schemas
+
+This page provides Snowplow schema reference for GitLab events.
+
+## `gitlab_standard`
+
+We are including the [`gitlab_standard` schema](https://gitlab.com/gitlab-org/iglu/-/blob/master/public/schemas/com.gitlab/gitlab_standard/jsonschema/) with every event. See [Standardize Snowplow Schema](https://gitlab.com/groups/gitlab-org/-/epics/5218) for details.
+
+The [`StandardContext`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/tracking/standard_context.rb) class represents this schema in the application.
+
+| Field Name     | Required            | Type                  | Description                                                                                 |
+|----------------|---------------------|-----------------------|---------------------------------------------------------------------------------------------|
+| `project_id`   | **{dotted-circle}** | integer               |                                                                 |
+| `namespace_id` | **{dotted-circle}** | integer               |                                                               |
+| `environment`  | **{check-circle}**  | string (max 32 chars) | Name of the source environment, such as `production` or `staging`             |
+| `source`       | **{check-circle}**  | string (max 32 chars) | Name of the source application, such as  `gitlab-rails` or `gitlab-javascript` |
+| `plan`         | **{dotted-circle}**  | string (max 32 chars) | Name of the plan for the namespace, such as `free`, `premium`, or `ultimate`. Automatically picked from the `namespace`. |
+| `extra`        | **{dotted-circle}**  | JSON                  | Any additional data associated with the event, in the form of key-value pairs |
+
+## Default Schema
+
+| Field Name               | Required            | Type      | Description                                                                                                                      |
+|--------------------------|---------------------|-----------|----------------------------------------------------------------------------------------------------------------------------------|
+| `app_id`                   | **{check-circle}**  | string    | Unique identifier for website / application                                                                                      |
+| `base_currency`            | **{dotted-circle}** | string    | Reporting currency                                                                                                               |
+| `br_colordepth`            | **{dotted-circle}** | integer   | Browser color depth                                                                                                              |
+| `br_cookies`               | **{dotted-circle}** | boolean   | Does the browser permit cookies?                                                                                                 |
+| `br_family`                | **{dotted-circle}** | string    | Browser family                                                                                                                   |
+| `br_features_director`     | **{dotted-circle}** | boolean   | Director plugin installed?                                                                                                       |
+| `br_features_flash`        | **{dotted-circle}** | boolean   | Flash plugin installed?                                                                                                          |
+| `br_features_gears`        | **{dotted-circle}** | boolean   | Google gears installed?                                                                                                          |
+| `br_features_java`         | **{dotted-circle}** | boolean   | Java plugin installed?                                                                                                           |
+| `br_features_pdf`          | **{dotted-circle}** | boolean   | Adobe PDF plugin installed?                                                                                                      |
+| `br_features_quicktime`    | **{dotted-circle}** | boolean   | Quicktime plugin installed?                                                                                                      |
+| `br_features_realplayer`   | **{dotted-circle}** | boolean   | RealPlayer plugin installed?                                                                                                     |
+| `br_features_silverlight`  | **{dotted-circle}** | boolean   | Silverlight plugin installed?                                                                                                    |
+| `br_features_windowsmedia` | **{dotted-circle}** | boolean   | Windows media plugin installed?                                                                                                  |
+| `br_lang`                  | **{dotted-circle}** | string    | Language the browser is set to                                                                                                   |
+| `br_name`                  | **{dotted-circle}** | string    | Browser name                                                                                                                     |
+| `br_renderengine`          | **{dotted-circle}** | string    | Browser rendering engine                                                                                                         |
+| `br_type`                  | **{dotted-circle}** | string    | Browser type                                                                                                                     |
+| `br_version`               | **{dotted-circle}** | string    | Browser version                                                                                                                  |
+| `br_viewheight`            | **{dotted-circle}** | string    | Browser viewport height                                                                                                          |
+| `br_viewwidth`             | **{dotted-circle}** | string    | Browser viewport width                                                                                                           |
+| `collector_tstamp`         | **{dotted-circle}** | timestamp | Time stamp for the event recorded by the collector                                                                               |
+| `contexts`                 | **{dotted-circle}** |           |                                                                                                                                  |
+| `derived_contexts`         | **{dotted-circle}** |           | Contexts derived in the Enrich process                                                                                           |
+| `derived_tstamp`           | **{dotted-circle}** | timestamp | Timestamp making allowance for inaccurate device clock                                                                          |
+| `doc_charset`              | **{dotted-circle}** | string    | Web page's character encoding                                                                                                    |
+| `doc_height`               | **{dotted-circle}** | string    | Web page height                                                                                                                  |
+| `doc_width`                | **{dotted-circle}** | string    | Web page width                                                                                                                   |
+| `domain_sessionid`         | **{dotted-circle}** | string    | Unique identifier (UUID) for this visit of this user_id to this domain                                                           |
+| `domain_sessionidx`        | **{dotted-circle}** | integer   | Index of number of visits that this user_id has made to this domain (The first visit is `1`)                                        |
+| `domain_userid`            | **{dotted-circle}** | string    | Unique identifier for a user, based on a first party cookie (so domain specific)                                                 |
+| `dvce_created_tstamp`      | **{dotted-circle}** | timestamp | Timestamp when event occurred, as recorded by client device                                                                      |
+| `dvce_ismobile`            | **{dotted-circle}** | boolean   | Indicates whether device is mobile                                                                                               |
+| `dvce_screenheight`        | **{dotted-circle}** | string    | Screen / monitor resolution                                                                                                      |
+| `dvce_screenwidth`         | **{dotted-circle}** | string    | Screen / monitor resolution                                                                                                      |
+| `dvce_sent_tstamp`         | **{dotted-circle}** | timestamp | Timestamp when event was sent by client device to collector                                                                      |
+| `dvce_type`                | **{dotted-circle}** | string    | Type of device                                                                                                                   |
+| `etl_tags`                 | **{dotted-circle}** | string    | JSON of tags for this ETL run                                                                                                    |
+| `etl_tstamp`               | **{dotted-circle}** | timestamp | Timestamp event began ETL                                                                                                        |
+| `event`                    | **{dotted-circle}** | string    | Event type                                                                                                                       |
+| `event_fingerprint`        | **{dotted-circle}** | string    | Hash client-set event fields                                                                                                     |
+| `event_format`             | **{dotted-circle}** | string    | Format for event                                                                                                                 |
+| `event_id`                 | **{dotted-circle}** | string    | Event UUID                                                                                                                       |
+| `event_name`               | **{dotted-circle}** | string    | Event name                                                                                                                       |
+| `event_vendor`             | **{dotted-circle}** | string    | The company who developed the event model                                                                                        |
+| `event_version`            | **{dotted-circle}** | string    | Version of event schema                                                                                                          |
+| `geo_city`                 | **{dotted-circle}** | string    | City of IP origin                                                                                                                |
+| `geo_country`              | **{dotted-circle}** | string    | Country of IP origin                                                                                                             |
+| `geo_latitude`             | **{dotted-circle}** | string    | An approximate latitude                                                                                                          |
+| `geo_longitude`            | **{dotted-circle}** | string    | An approximate longitude                                                                                                         |
+| `geo_region`               | **{dotted-circle}** | string    | Region of IP origin                                                                                                              |
+| `geo_region_name`          | **{dotted-circle}** | string    | Region of IP origin                                                                                                              |
+| `geo_timezone`             | **{dotted-circle}** | string    | Time zone of IP origin                                                                                                            |
+| `geo_zipcode`              | **{dotted-circle}** | string    | Zip (postal) code of IP origin                                                                                                   |
+| `ip_domain`                | **{dotted-circle}** | string    | Second level domain name associated with the visitor's IP address                                                                |
+| `ip_isp`                   | **{dotted-circle}** | string    | Visitor's ISP                                                                                                                    |
+| `ip_netspeed`              | **{dotted-circle}** | string    | Visitor's connection type                                                                                                        |
+| `ip_organization`          | **{dotted-circle}** | string    | Organization associated with the visitor's IP address – defaults to ISP name if none is found                                    |
+| `mkt_campaign`             | **{dotted-circle}** | string    | The campaign ID                                                                                                                  |
+| `mkt_clickid`              | **{dotted-circle}** | string    | The click ID                                                                                                                     |
+| `mkt_content`              | **{dotted-circle}** | string    | The content or ID of the ad.                                                                   |
+| `mkt_medium`               | **{dotted-circle}** | string    | Type of traffic source                                                                                                           |
+| `mkt_network`              | **{dotted-circle}** | string    | The ad network to which the click ID belongs                                                                                     |
+| `mkt_source`               | **{dotted-circle}** | string    | The company / website where the traffic came from                                                                                |
+| `mkt_term`                 | **{dotted-circle}** | string    | Keywords associated with the referrer                                                                                        |
+| `name_tracker`             | **{dotted-circle}** | string    | The tracker namespace                                                                                                            |
+| `network_userid`           | **{dotted-circle}** | string    | Unique identifier for a user, based on a cookie from the collector (so set at a network level and shouldn't be set by a tracker) |
+| `os_family`                | **{dotted-circle}** | string    | Operating system family                                                                                                          |
+| `os_manufacturer`          | **{dotted-circle}** | string    | Manufacturers of operating system                                                                                                |
+| `os_name`                  | **{dotted-circle}** | string    | Name of operating system                                                                                                         |
+| `os_timezone`              | **{dotted-circle}** | string    | Client operating system time zone                                                                                                 |
+| `page_referrer`            | **{dotted-circle}** | string    | Referrer URL                                                                                                                     |
+| `page_title`               | **{dotted-circle}** | string    | Page title                                                                                                                       |
+| `page_url`                 | **{dotted-circle}** | string    | Page URL                                                                                                                         |
+| `page_urlfragment`         | **{dotted-circle}** | string    | Fragment aka anchor                                                                                                              |
+| `page_urlhost`             | **{dotted-circle}** | string    | Host aka domain                                                                                                                  |
+| `page_urlpath`             | **{dotted-circle}** | string    | Path to page                                                                                                                     |
+| `page_urlport`             | **{dotted-circle}** | integer   | Port if specified, 80 if not                                                                                                     |
+| `page_urlquery`            | **{dotted-circle}** | string    | Query string                                                                                                                      |
+| `page_urlscheme`           | **{dotted-circle}** | string    | Scheme (protocol name)                                                                                                              |
+| `platform`                 | **{dotted-circle}** | string    | The platform the app runs on                                                                                                     |
+| `pp_xoffset_max`           | **{dotted-circle}** | integer   | Maximum page x offset seen in the last ping period                                                                               |
+| `pp_xoffset_min`           | **{dotted-circle}** | integer   | Minimum page x offset seen in the last ping period                                                                               |
+| `pp_yoffset_max`           | **{dotted-circle}** | integer   | Maximum page y offset seen in the last ping period                                                                               |
+| `pp_yoffset_min`           | **{dotted-circle}** | integer   | Minimum page y offset seen in the last ping period                                                                               |
+| `refr_domain_userid`       | **{dotted-circle}** | string    | The Snowplow `domain_userid` of the referring website                                                                              |
+| `refr_dvce_tstamp`         | **{dotted-circle}** | timestamp | The time of attaching the `domain_userid` to the inbound link                                                                      |
+| `refr_medium`              | **{dotted-circle}** | string    | Type of referer                                                                                                                  |
+| `refr_source`              | **{dotted-circle}** | string    | Name of referer if recognised                                                                                                    |
+| `refr_term`                | **{dotted-circle}** | string    | Keywords if source is a search engine                                                                                            |
+| `refr_urlfragment`         | **{dotted-circle}** | string    | Referer URL fragment                                                                                                             |
+| `refr_urlhost`             | **{dotted-circle}** | string    | Referer host                                                                                                                     |
+| `refr_urlpath`             | **{dotted-circle}** | string    | Referer page path                                                                                                                |
+| `refr_urlport`             | **{dotted-circle}** | integer   | Referer port                                                                                                                     |
+| `refr_urlquery`            | **{dotted-circle}** | string    | Referer URL query string                                                                                                          |
+| `refr_urlscheme`           | **{dotted-circle}** | string    | Referer scheme                                                                                                                   |
+| `se_action`                | **{dotted-circle}** | string    | The action / event itself                                                                                                        |
+| `se_category`              | **{dotted-circle}** | string    | The category of event                                                                                                            |
+| `se_label`                 | **{dotted-circle}** | string    | A label often used to refer to the 'object' the action is performed on                                                           |
+| `se_property`              | **{dotted-circle}** | string    | A property associated with either the action or the object                                                                       |
+| `se_value`                 | **{dotted-circle}** | decimal   | A value associated with the user action                                                                                          |
+| `ti_category`              | **{dotted-circle}** | string    | Item category                                                                                                                    |
+| `ti_currency`              | **{dotted-circle}** | string    | Currency                                                                                                                         |
+| `ti_name`                  | **{dotted-circle}** | string    | Item name                                                                                                                        |
+| `ti_orderid`               | **{dotted-circle}** | string    | Order ID                                                                                                                         |
+| `ti_price`                 | **{dotted-circle}** | decimal   | Item price                                                                                                                       |
+| `ti_price_base`            | **{dotted-circle}** | decimal   | Item price in base currency                                                                                                      |
+| `ti_quantity`              | **{dotted-circle}** | integer   | Item quantity                                                                                                                    |
+| `ti_sku`                   | **{dotted-circle}** | string    | Item SKU                                                                                                                         |
+| `tr_affiliation`           | **{dotted-circle}** | string    | Transaction affiliation (such as channel)                                                                                           |
+| `tr_city`                  | **{dotted-circle}** | string    | Delivery address: city                                                                                                           |
+| `tr_country`               | **{dotted-circle}** | string    | Delivery address: country                                                                                                        |
+| `tr_currency`              | **{dotted-circle}** | string    | Transaction Currency                                                                                                             |
+| `tr_orderid`               | **{dotted-circle}** | string    | Order ID                                                                                                                         |
+| `tr_shipping`              | **{dotted-circle}** | decimal   | Delivery cost charged                                                                                                            |
+| `tr_shipping_base`         | **{dotted-circle}** | decimal   | Shipping cost in base currency                                                                                                   |
+| `tr_state`                 | **{dotted-circle}** | string    | Delivery address: state                                                                                                          |
+| `tr_tax`                   | **{dotted-circle}** | decimal   | Transaction tax value (such as amount of VAT included)                                                                              |
+| `tr_tax_base`              | **{dotted-circle}** | decimal   | Tax applied in base currency                                                                                                     |
+| `tr_total`                 | **{dotted-circle}** | decimal   | Transaction total value                                                                                                          |
+| `tr_total_base`            | **{dotted-circle}** | decimal   | Total amount of transaction in base currency                                                                                     |
+| `true_tstamp`              | **{dotted-circle}** | timestamp | User-set exact timestamp                                                                                                         |
+| `txn_id`                   | **{dotted-circle}** | string    | Transaction ID                                                                                                                   |
+| `unstruct_event`           | **{dotted-circle}** | JSON      | The properties of the event                                                                                                      |
+| `uploaded_at`              | **{dotted-circle}** |           |                                                                                                                                  |
+| `user_fingerprint`         | **{dotted-circle}** | integer   | User identifier based on (hopefully unique) browser features                                                                     |
+| `user_id`                  | **{dotted-circle}** | string    | Unique identifier for user, set by the business using setUserId                                                                  |
+| `user_ipaddress`           | **{dotted-circle}** | string    | IP address                                                                                                                       |
+| `useragent`                | **{dotted-circle}** | string    | User agent (expressed as a browser string)                                                                                                |
+| `v_collector`              | **{dotted-circle}** | string    | Collector version                                                                                                                |
+| `v_etl`                    | **{dotted-circle}** | string    | ETL version                                                                                                                      |
+| `v_tracker`                | **{dotted-circle}** | string    | Identifier for Snowplow tracker                                                                                                  |