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Subject: Re: [xml-dev] Is there a way to reuse and extend an enumeration inXML schema
"Marty Burns" <burnsmarty@comcast.net> writes: <snip/> > I guess the only minor downsides I see to your redefine method is: > 1) you would have to look to the schemaLocation attribute in the instance > file to recognize that the redefinitions occurred. Yes, or control the schema documents used more explicitly at validation invocation time . . . > 2) you would not be able to pick and choose which instances of the code list > is overridden -- e.g. one instance uses <cl:code>foo</> and another uses > <customCl:code>foo</>. Well, to do that you don't redefine, you define your own restriction in your own namespace, and use xsi:type, i.e. <cl:code xsi:type="customCL:codeListType">foo</cl:code> > 3) This is more of a question -- is it possible to redefine several types > from different namespaces in a single schema file so there would be a single > incorporation of all changes referenced in the schemaLocation attribute of > the instance file. Not directly possible -- if you want exactly one driver schema doc, it would have to xs:import one redefining schema doc per namespace, and hope your validator uses the xs:import schemaLoc hints (which they all do, as far as I know). > Thanks again for highlighting a promising solution that might be able to > meet all the UBL requirements. You're welcome. ht -- 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@inf.ed.ac.uk 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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