This script function is called before a SaveCurrMetadata,
SaveSegMetadata or
SavePPMetadata script function. It makes StreamServer cache the metadata updated by the
Save<xx>Metadata function instead of storing the metadata directly in the Document Broker repository. You must use
PPCommitDocMDUpdate to store the cached metadata in the Document Broker repository.
PPBeginDocMDUpdate can be used at any post-processing script level. For example, if
PPBeginDocMDUpdate is called at Job Begin and
PPCommitDocMDUpdate is called at Job End, all metadata belonging to all documents are saved when the post-processor job finishes.