This function is used to query the entity lookup table. During document bursting, Arbortext Editor refrains from adding the same file-based entity to the document repository more than once, preferring to use the exiting object in the repository. The entity lookup table maintains a list of the file entities already added and their respective persistent object identifiers (POIDs) in the repository.

The sesshdl parameter is a session handle. The filename parameter is the path to the file entity which has been added to the repository.

This function returns the POID of the document object matching the provided filename and a zero (0) if the filename was not in the table.