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 IPDRRec element. 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. This type supports time resolution at the millisecond level It is further constrained to always use the timezone designator "Z" indicating GMT. Quantities of this type can optionally use 3 digits of fraction after the second to represent the milliseconds. If absent, it is assumed the millisecond component is ".000". Example: 1999-05-31T13:20:00.561Z An IP version 4 address in dotted notation decimal. Example: 15.13.120.22 An IP version 6 address in colon separated 2 byte block hexadecimal notation. Example: FEDC:AB19:12FE:0234:98EF:1178:8891:CAFF A universal unique id in hex dash notation. Example: f81d4fae-7dec-11d0-a765-00a0c91e6bf6