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acknowledgements for ansi/nist-itl 1-2011 - NIST Visual Image ...

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ANSI/<strong>NIST</strong>-ITL 1-<strong>2011</strong> - UPDATE 2013 DRAFT VERSIONC.5.5 GMT date/time <strong>for</strong>matGMT date/time values shall be represented in the <strong>for</strong>m YYYY-MM-DDThh:mm:ssZ. SeeSection 7.7.2.2 Greenwich mean time (coordinated universal time – UTC) / GMT. Forexample2008-02-29T05:25:00ZC.5.6 Abstract elementsThe abstract elements listed in Section C.3 Scope, purpose, and con<strong>for</strong>mance allowimplementers to extend the specification by supplying substitution elements of their owndesign. These are the only abstract elements that implementers may extend. A singleexample here will be illustrative. The complex element is abstract, and as such is unusable by itself.Implementers shall define, in an extension schema, a substitution element containing userdefinedchild elements. A substitution element should be defined in a user’s extensionschema similar to this:The substitution element would then appear in an instance document like this:TextTextMay, 2013 DRAFT VERSION UPDATE 2013 Page 461

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