Developing Apama Applications > Developing Apama Applications in Event Modeler > Using Event Modeler > Using the Catalogs tab > Selecting and inspecting a block template
Selecting and inspecting a block template
The Catalogs tab is divided horizontally into two areas.
The top area displays the available catalogs. Expand each catalog to view its contents. When you select one of the following, a description of it appears in the bottom area:
*A particular version of a block template
*A block parameter
*A block operation
*A block input feed or input field
*A block output feed or output field
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