Hello, The Energy Interoperability schema has various types of party identifiers of type xs:string. It is common in e-business schemas for Party Identifiers to have a type (or similar) attribute that allows the identifier to be typed. Examples of this are UN/CEFACT XML business document schemas, Universal Business Language (UBL) 2.0, Open Application Group Integration Specification (OAGIS), the UN/CEFACT Standard Business Document Header (SBDH), Extensible Business Reporting Language (XBRL), Financial Product Markup Language (FML), ebXML Messaging (ebMS) and Collaboration Protocol Profiles and Agreements (CPP/A). An excerpt from a UBL document might look like: <cac:BuyerCustomerParty> <cac:Party> <cac:PartyIdentification> <cbc:ID schemeID= urn:oasis:names:tc:ebcore:partyid-type:iso6523:0088 >4035811991021</cbc:ID> </cac:PartyIdentification> </cac:Party> </cac:BuyerCustomerParty> The schemeID attribute qualifies the buyer party identifier 4035811991021 as a GS1 Global Location Number (GLN) using the ebCore Party Identifier type syntax (
http://docs.oasis-open.org/ebcore/PartyIdType/v1.0/ ). The type specifies the identifier scheme from which the identifier value is taken. A similar mechanism to qualify identifiers might be useful for Energy Interoperation. Pim