Re: Creating a XML Schema for an existing database
Jeff Rafter <lists@j...> writes: . . . > In XSV and Xerces keys and keyrefs apparently treat simple ur-type and > xs:string the same Because the REC says they can : "Values of differing type can only be equal if one type is derived from the other, and the value is in the value space of both." combined with : "The mapping from lexical space to value space is unspecified for items whose type definition is the *simple ur-type definition*. Accordingly this specification does not constrain processors' behaviour in areas where this mapping is implicated, for example checking such items against enumerations, constructing default attributes or elements whose declared type definition is the *simple ur-type definition*, checking identity constraints involving such items." ht  http://www.w3.org/TR/xmlschema-1/#Identity-constraint_Definition_details  http://www.w3.org/TR/xmlschema-1/#Simple_Type_Definition -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh Half-time member of W3C Team 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht@i... URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam]
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