sequence

The sequence number of the document in the database. The sequence number indicates how recently the document has been changed. Every time a document is updated, the database assigns it the next sequential sequence number. Thus, when a document's sequence number changes it means that the document been update (on-disk). If one document's sequence is different than another's, the document with the larger sequence number was changed more recently. Sequence numbers are not available for documents obtained from a replication filter. This method will always return 0 for such documents.