--- title: Placeholder slug: experience/placeholder description: Learn about the structure of a purple application with this document. Discover how it is composed of a native app and a web view experience. Find detailed explanations and examples for various parameters like content ID, bookmark section, issue ID, and cu docTags: createdAt: 2023-03-24T10:48:41.000Z --- ## Getting started A purple application technically consists of a native app part and an experience part that runs within a web view. The placeholders in this documentation are listed under the [Native app](docId\:HWgaxh6bT5orBprp0V9VG) or [Experience](docId\:HWgaxh6bT5orBprp0V9VG) subchapters based on the origin they occur. In addition, event-specific placeholders are listed explicitly in the subchapters [Event specific](docId\:HWgaxh6bT5orBprp0V9VG). ## Native app ### Content | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | CONTENT\_ID | The content id is composed of the issues publication id and issue id.
Value is based on this template:
<*publication_id*>/<*issue_id*> | | CONTENT\_NAME | The content name comes from the name of the issue. | :::hint{type="info"} Example for composing the value of **CONTENT\_ID**: If the - puplication has the id "**my_publication_id**" and - the issue has the id "**my_issue_id**" the result will be: "**my_publication_id/my_issue_id**" ::: ### Bookmark | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------------------------------------- | | BOOKMARK\_SECTION | The section comes from the section within TOC. | | BOOKMARK\_TITLE | The bookmark title comes from the name of the issue. | ### Issue | **Parameter placeholder** | **Description** | | ---------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | ISSUE\_ID | The id of the issue. | | ISSUE\_NAME | The name of the issue. | | All custom issue properties

| A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.
The key names are based on the custom property names. The custom property names are transformed before use.
Key is based on this template:
PROPERTY_<*transformed_name_of_custom_property*>
Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-issue-property**" the transform finally leads to: "**PROPERTY\_MY\_CUSTOM\_ISSUE\_PROPERTY**" ::: ### Page | **Parameter placeholder** | **Description** | | ------------------------- | ------------------------ | | PAGE\_ALIAS | The alias of the page. | | PAGE\_ID | The id of the page. | | PAGE\_INDEX | The index of the page. | | PAGE\_LABEL | The label of the page. | | PAGE\_NUMBER | The number of the page. | | PAGE\_SECTION | The section of the page. | | PAGE\_TITLE | The title of the page. | ### Publication | **Parameter placeholder** | **Description** | | --------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | PUBLICATION\_ID | The id of the publication. | | PUBLICATION\_NAME | The name of the publication. | | All custom publication properties

| A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.
The key names are based on the custom property names. The custom property names are transformed before use.
Key is based on this template:
PROPERTY_<*transformed_name_of_custom_property*>
Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-publication-property**" the transform finally leads to: "**PROPERTY\_MY\_CUSTOM\_PUBLICATION\_PROPERTY**" ::: ## Experience ### Bookmark | **Parameter placeholder** | **Description** | | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | BOOKMARK\_CREATION\_DATE | The date the bookmark was created. | | BOOKMARK\_DESCRIPTION | The description of the bookmark. | | BOOKMARK\_PAGE\_LABEL | The page label of the referenced page from the issue. | | BOOKMARK\_TITLE | The title of the bookmark. | | Custom bookmark data | A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.

The key names are based on the custom data names. The custom data names are transformed before use.

Key is based on this template:
BOOKMARK_CUSTOM_DATA_<transformed_custom_data_name>

Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-bookmark-data-property**" the transform finally leads to: "**BOOKMARK\_CUSTOM\_DATA\_MY\_CUSTOM\_BOOKMARK\_DATA\_PROPERTY**" ::: ### Category | **Parameter placeholder** | **Description** | | ------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | CATEGORY\_ID | The id of category. | | CATEGORY\_NAME | The name of category. | | CATEGORY\_PARENT\_CATEGORY\_ID | The id of the parent category. | | All custom category properties | A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.

The key names are based on the custom property names. The custom property names are transformed before use.

Key is based on this template:
CATEGORY_PROPERTY_<transformed_name_of_custom_property>

Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-category-property**" the transform finally leads to: "**CATEGORY\_PROPERTY\_MY\_CUSTOM\_CATEGORY\_PROPERTY**" ::: ### Issue :::hint{type="warning"} Some events will not include the price. In that case the placeholders **ISSUE\_PRICE**, **ISSUE\_PRICE\_CURRENCY** and **ISSUE\_PRICE\_VALUE **are not available. ::: | **Parameter placeholder** | **Description** | | --------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ISSUE\_ID | The id of the issue. | | ISSUE\_LATEST | Indicates whether the issue is the current one or not within its publication. | | ISSUE\_NAME | The name of the issue. | | ISSUE\_PRICE | Formatted price when the price is available. | | ISSUE\_PRICE\_CURRENCY | Currency of price when the price is available. | | ISSUE\_PRICE\_VALUE | Value of price when the price is available. | | ISSUE\_PRODUCT\_ID | The product id to purchase that issue by single purchase. | | ISSUE\_PURCHASABLE | Indicates if that issue is purchasable. | | ISSUE\_PURCHASED | Indicates if that issue has already been purchased. | | ISSUE\_TYPE | The value of this field is "**ISSUE**". | | All custom issue properties | A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.

The key names are based on the custom property names. The custom property names are transformed before use.

Key is based on this template:
ISSUE_PROPERTY_<transformed_name_of_custom_property>

Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | | All source issue parameters | A list of parameter placeholders for the source issue.
Source parameter is based on this template:
SOURCE_<issue_parameter> | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-issue-property**" the transform finally leads to: "**ISSUE\_PROPERTY\_MY\_CUSTOM\_ISSUE\_PROPERTY**" ::: ### Product | **Parameter placeholder** | **Description** | | ----------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | PRODUCT\_DESCRIPTION | The description of the product. | | PRODUCT\_HIDDEN | Indicates wether this product is hidden or not. | | PRODUCT\_ID | The id of the product. | | PRODUCT\_NAME | The name if the product. | | PRODUCT\_PRICE | The formatted price of the price. | | PRODUCT\_PRICE\_CURRENCY | The currency of the price. | | PRODUCT\_PRICE\_VALUE | The value of the price. | | PRODUCT\_PURCHASED | Indicates if the product is purchased by the user. | | PRODUCT\_TYPE | The type of the product. | | All custom product properties | A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.

The key names are based on the custom property names. The custom property names are transformed before use.

Key is based on this template:
PRODUCT_PROPERTY_<transformed_name_of_custom_property>

Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-product-property**" the transform finally leads to: "**PRODUCT\_PROPERTY\_MY\_CUSTOM\_PRODUCT\_PROPERTY**" ::: ### Publication | **Parameter placeholder** | **Description** | | ------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | PUBLICATION\_ID | The id of the publication. | | PUBLICATION\_NAME | The name of the publication. | | PUBLICATION\_TYPE | The type of the publication. | | All custom publication properties | A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.

The key names are based on the custom property names. The custom property names are transformed before use.

Key is based on this template:
PUBLICATION_PROPERTY_<transformed_name_of_custom_property>

Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | | All parameters of the related source publication. | A list of parameter placeholders for the source publication.

Source parameter is based on this template:
SOURCE_<publication_parameter> | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-publication-property**" the transform finally leads to: "**PUBLICATION\_PROPERTY\_MY\_CUSTOM\_PRODUCT\_PROPERTY**" ::: ### Subscription | **Parameter placeholder** | **Description** | | ---------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | SUBSCRIPTION\_DURATION | The duration of the subscription. | | SUBSCRIPTION\_ID | The id oft the subscription. | | SUBSCRIPTION\_NAME | The name of the subscription. | | SUBSCRIPTION\_PRICE | The formatted price of the price. | | SUBSCRIPTION\_PRICE\_CURRENCY | The currency of the price. | | SUBSCRIPTION\_PRICE\_VALUE | The value of the price. | | SUBSCRIPTION\_PRODUCT\_ID | The product id of the subscription. | | SUBSCRIPTION\_PURCHASED | Indicates if the subscription is purchased by the user. | | SUBSCRIPTION\_TYPE | The type of the subscription. | | All custom subscription properties | A list of key/value pairs. Key/value pairs with empty values are omitted for tracking.

The key names are based on the custom property names. The custom property names are transformed before use.

Key is based on this template:
SUBSCRIPTION_PROPERTY_<transformed_name_of_custom_property>

Transform is done as follows:
1) custom property name is converted to **uppercase** 2) **hyphens** are replaced with **underscores** | :::hint{type="info"} Example for custom property transformation: If there is a custom property like this: "**my-custom-subscription-property**" the transform finally leads to: "**SUBSCRIPTION\_PROPERTY\_MY\_CUSTOM\_SUBSCRIPTION\_PROPERTY**" ::: ### content.open :::hint{type="warning"} Some events will provide these placeholders when the corresponding issue was opened by the javascript API "*content.open*". ::: | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------------------------------------------------------------- | | ISSUE\_CATEGORIES | The categories of the issue as comma separated list. | | ISSUE\_LATEST | Indicates whether the issue is the current one or not within its publication. | | ISSUE\_PRODUCT\_ID | The product id to purchase that issue by single purchase. | | ISSUE\_PURCHASABLE | Indicates if that issue is purchasable. | | ISSUE\_PURCHASED | Indicates if that issue has already been purchased. | | ISSUE\_TAGS | The tags of the issue as comma separated list. | | ISSUE\_TYPE | The value of this field is "**ISSUE**". | | PUBLICATION\_TYPE | The type of the publication. | ### View context for action events | **Parameter placeholder** | **Description** | | ------------------------- | ---------------------------------------------------- | | VIEW | The view name within the action event was triggered. | ### View context for view events | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------------------------------------------------------------------------------------------- | | POPUP | Indicates whether the view was opened within a popup.
Possibles values are:
**true** or **false** | | VIEW | The view name within the view event was triggered. | ## Event specific ### CONTENT\_OPEN\_FAILED | **Parameter placeholder** | **Description** | | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ISSUE | Possible values are:
1) "\<*issueId*>" 2) "alias/\<*alias*>" 3) "external\_id/\<*external_issue_id*>" | ### PRESENTER\_ARTICLE\_VISIBILITY | **Parameter placeholder** | **Description** | | ------------------------- | ---------------------------------------- | | ARTICLE\_ID | The id of the article. | | PERCENTAGE\_IN\_VIEW | The percentage in view for this article. | ### PRESENTER\_CONTENT\_URL\_OPENED | **Parameter placeholder** | **Description** | | ------------------------- | --------------------- | | TARGET\_URL | The value of the URL. | ### STOREFRONT\_\<content_type>\_SEARCH\_RESULT\_PAGE\_HIT\_CLICKED | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------- | | PAGE\_INDEX | The index of the page. | | PAGE\_LABEL | The label of the page. | | PAGE\_NUMBER | The number of the page. | | PAGE\_TITLE | The title of the page. | ### STOREFRONT\_HTML\_LINK\_OPEN\_\<action> :::hint{type="info"} Actions are as follows: - APP_BROWSER - EXTERNAL - INLINE ::: | **Parameter placeholder** | **Description** | | ------------------------- | ---------------------- | | LINK\_TEXT | The text for the link. | | TARGET\_URL | The value of the URL. | ### STOREFRONT\_LOGIN\_LINK\_CLICKED | **Parameter placeholder** | **Description** | | ------------------------- | --------------------- | | TARGET\_URL | The value of the URL. | ### STOREFRONT\_POPUP\_CLOSE\_CLICKED | **Parameter placeholder** | **Description** | | ------------------------- | --------------------------------------------------- | | POPUP | Indicates if a view is shown within a popup or not. | ### STOREFRONT\_PRODUCT\_LOAD\_FAILED | **Parameter placeholder** | **Description** | | ------------------------- | --------------------------------------------------------- | | error | The error which occurs while loading product information. | | productId | The product id. | ### STOREFRONT\_SEARCH\_PERFORMED | **Parameter placeholder** | **Description** | | ------------------------- | --------------------------------- | | PHRASE | The phrase the user searched for. | ### STOREFRONT\_SUBSCRIPTION\_CODE\_\<action> :::hint{type="info"} Actions are as follows: - ACTIVATED - ACTIVATED_ERROR_EXISTS - ACTIVATED_ERROR_INVALID - ACTIVATED_ERROR_OFFLINE - DEACTIVATED - DEACTIVATED_ERROR - DEACTIVATED_ERROR_OFFLINE - DEACTIVATED_ERROR_UNKNOWN ::: | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------------------- | | SUBSCRIPTION\_CODE | The value of the subscription code. | ### STOREFRONT\_TAB\_NAVIGATION\_CLICKED | **Parameter placeholder** | **Description** | | ------------------------- | ---------------------------------------------------------------------------------------------------------- | | ACTION | The type of the action of the tapped navigation entry. The value is based on the file "*navigation.json*". | | TARGET | The path of the tapped navigation entry. The value is based on the file "*navigation.json*". | ### Placeholder for ad related events | **Parameter placeholder** | **Description** | | ------------------------- | ----------------- | | AD\_ID | The id of the ad. | ### Placeholder for purchase related events | **Parameter placeholder** | **Description** | | ------------------------- | ----------------------------------------------------------------- | | CURRENCY\_CODE | The locale based currency code (e.g. "USD"). | | PRICE | The price of the purchased product. | | PRODUCT\_ID | The related product id. | | TRANSACTION\_ID | The related transaction id from google play store or apple store. |