Template field triggers
The template field trigger specifies where a dynamic list of fields can be included in a report created from a template.
When you create the report template schema definition (.rsd), you
            add the TemplateFieldsTrigger element to provide a placeholder for
            data. For example:
<TemplateFieldsTrigger groupName="fields"/>
<TemplateFieldsTrigger groupName="anotherName"/>
        When you associate the report template schema definition with the report template, each
                TemplateFieldsTrigger group becomes a template field trigger. In
            the Report Structure view, the template field trigger displays as blue to distinguish it
            from other triggers. You can place items under this trigger, as in Figure 1.

When the user creates a report from the template, the template field trigger displays as
            the Add fields page in the New Report from
                Template dialog. Each uniquely-named
                TemplateFieldsTrigger group becomes a separate Add
                Fields page. See Figure 2. 
