IBM is sharing the error messages that it issues for schema definition errors in order to assist other DFDL implementations. Attached are the IBM DFDL model component and validator component error messages. Between them they should cover all SDEs, except those caused by violation of XML 1.0 and base XML Schema 1.0 rules - we just echo what we get back from the EMF code. Notice that the messages all have a consistent structure for the text. However considerable rationalisation is possible if one combines error messages that are essentially the same and use appropriate inserts. If the DFDL WG agrees that is the right thing to do then IBM can do this and re-distribute. Regards Steve Hanson Architect, IBM Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 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