There are some variation between the FrameMaker4.0 and 5.0 versions of this API. Choose the release you are using to view the documentation for this API.
Catalog Lister Reports (Frame4)
Catalog Lister Reports (Frame5)
Paragraph Utilization Audit API
This API is designed to list all of the paragraph formats used in a certain document, set of documents, or book. It generates three output tables listing all the paragraph tags used as well as if it was an authorized tag, how many times it was used, and how many times it was used with overrides.