The oid_gentext function returns the generated text for the oid as an SGML string. It returns the null string if the oid does not exist or does not have any generated text.

The after parameter specifies that generated text that follows the element's content (that is with placemnt=after) should be returned. If this parameter is omitted (or 0), generated text that precedes the element content, (that is with placemnt=before) is returned.