The checkConstraints() function will check against the XSDL fixed attribute. It won't check the XSDL default, minOccurs or maxOccurs attributes. 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 From: "Garriss Jr., James P." <jgarriss@mitre.org> To: "dfdl-wg@ogf.org" <dfdl-wg@ogf.org>, Date: 07/06/2013 15:03 Subject: [DFDL-WG] of check constraints and fixed Sent by: dfdl-wg-bounces@ogf.org Check constraints can be used… <xsd:annotation> <xsd:appinfo source=" http://www.ogf.org/dfdl/dfdl-1.0/"> <dfdl:assert test="{ dfdl:checkConstraints(.) }" message="There cannot be more than 59 seconds in a minute."/> </xsd:appinfo> </xsd:annotation> …to validate (while parsing) the restrictions placed on an element: <xsd:simpleType> <xsd:restriction base= "xsd:unsignedInt"> <xsd:maxInclusive value= "59"/> </xsd:restriction> </xsd:simpleType> Is check constraints similarly required to validate the fixed value of an element while parsing? <xsd:element name="MimeVersion" dfdl:initiator="MIME-Version:%SP;" dfdl:terminator="%NL;" type="xsd:string" dfdl:length="3" dfdl:lengthKind= "explicit" fixed="1.0"> If not, then how do I force it to validate while parsing? 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