2.2.2.4.2 DelAck Element Attributes
The protocol defines the following attributes of the DelAck element.
ContactURL (String): This attribute MUST be present and MUST be the Identity URL of the endpoint that created the DelAck.
DepSeq (String): This attribute MUST be present and MUST have a value as defined in 2.2.1.4.2 except that the sequence of the previously generated delta from this endpoint is included.
DeviceURL (String): This attribute MUST be present and MUST be the device URL of the endpoint that created the DelAck.
Gp (Int): This attribute MUST be present and MUST be the highest group number of all the deltas executed by the endpoint that created the DelAck.