There are three system tags defined in TMWorkItemTemplate.html. Do not modify them. The system tags are:
TM_WORKITEMVIEWER_VERSION
This tag indicates the version of the work item template. The current version value is 2.0.2. Based on the work item viewer version, the TaskManager may process viewers differently. This tag allows the TaskManager to perform version management on the work item viewers.
TM_WORKITEMVIEWER_SCRIPT
The TaskManager requires specific JavaScript to handle certain browser events. This tag is replaced at runtime (when the work item viewer is opened in the TaskManager) with the JavaScript required by TaskManager.
TM_WIV_HEADER
This tag places a header at the top of the work item viewer, indicating the name of the work item being displayed and its priority level.