Saturday, 28 May 2016

Using Custom Tag Libraries to search for AEM Content Tags

You can create custom tag libraries for Adobe Experience Manager (AEM) and use them to search for AEM content tags. Tags are a quick and easy method of classifying content within your website. In technical terms, a tag is a piece of metadata assigned to a content node within AEM (usually a page). A custom tag library uses an OSGi component. Within the OSGi component, the AEM Tag Manager is used to search for the content tags, For information about the API, see TagManager API.
A custom tag library is implemented as an OSGi bundle that contains a Java class that extendsTagSupport. For information, see Class TagSupport.
You also need to define a tag library descriptor (TLD) file and bundle that within the OSGi bundle. For information, see Tag Library Descriptors.
After you develop an AEM custom tag library, you can invoke its actions from an AEM component. For example, the component can display information about tag usage (for example, the number of times it is used). In this article, a Tags xtype is used to let the author select a tag from an AEM dialog, as shown in the following illustration.

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