The Provenance Store Record schema Author: Paul Groth Last Modified: 30 August 2005 If the provenance store is being accessed under a synchronous connection, (i.e. remote procedure call style) the provenance store may return a synch_ack instead of an ack element. Under such a situation, the provenance store does not need to parse the incoming message in order to send an acknowledgment. This field should be pressent if the messageName element's value is ERROR. As of yet we do not define the type of the error message that can be returned by the provenance store.