PIDS11 — Need another type for this trait in PersonIdTraits module

Summary: I have one request for the revision task force. There is
a trait in the PersonIdTraits module - PIDS/ExternalIds and its type is
QualifiedPersonIdSeq. We need another type for this trait - which will
correspond to the HL7 type for the patient"s Identifiers, e.g. it should
have the domain, identifier and the type of identifier. A system can
support multiple alternate patient identifiers - so in order to fully
qualify what kind of externalId is being used, its type ( HL7 suggested
table of Identifiers types can be used) needs to be defined.