See the property description in the DFDL spec for dfdl:initiator. It can be a space-separated list (there are several DFDL properties like this). Regards Steve Hanson Architect, Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 From: "Garriss Jr., James P." <jgarriss@mitre.org> To: "dfdl-wg@ogf.org" <dfdl-wg@ogf.org>, Date: 27/02/2013 17:48 Subject: [DFDL-WG] Alternate Initiators? Sent by: dfdl-wg-bounces@ogf.org Consider the following IMF headers: Message-ID: <CACQ76nh2VDypuwm1aHc1-s8ZmmyXg8XEosS6af6yurkVdT+8QQ@mail.gmail.com> Message-Id: <208E8372-A9D9-468A-9B4B-BD97ED28F64C@garriss.org> Notice the difference: Message-ID: vs Message-Id: Per the RFC, only the first is legal, but both are used in practice, and we’d like to allow either. In our DFDL schema, “Message-ID” is an initiator, but suddenly we have two alternate initiators for the same element. How we model this in DFDL? TIA-- dfdl-wg mailing list dfdl-wg@ogf.org https://www.ogf.org/mailman/listinfo/dfdl-wg Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU