The IPDRDoc.End element optionally marks the end of the IPDR block. It may contain some check information like a count of IPDRs. This is the base type for the IPDR element. The service-specific schema can extend this by deriving from it. An IPDR describes an event between a service consumer and a service element. Details of the event are contained within this record. All IPDR elements have a time indicating when the event occurred. The IPDRDoc element is the top-level container of a set of IPDRs. The document will also define the entity which recorded these IPDRs via the IPDR element.