- From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
- Date: 30 Nov 2000 11:04:38 +0000
- To: "Holger Juschkewitz" <hjuschke@web.de>
- Cc: xmlschema-dev@w3.org
"Holger Juschkewitz" <hjuschke@web.de> writes: > why does the validation not fail if I validate obvisiously wrong > schemas? I developed accidently the following (wrong) schema with > defining a complex type with a type attribute. Even though the > (strict) validation succeeded. Shouldn't it report my error? Sorry for slow reply, I've been on the road (at XML Schema meetings :-). You haven't said which validator you were using, or how you invoked it. If you were using XSV, and you just checked whether yor schema was schema-valid per the schema for schemas, then no errors _should_ be reported, because the constraint that a 'type' attribute is incompatible with a 'complexType' child is not _in_ the schema for schemas. If you try to _use_ this schema, XSV will report an error as follows: <schemaError char='15' line='9' phase='schema' resource='jusch.xsd'>declaration with 'type' attribute must not have nested type declaration</schemaError> > Also, the validation doesn't report if I use undeclared types, like > the attribute complex type would be missing in the above schema. Same issue -- the validator doesn't know until you try to _use_ this schema whether or not a definition of 'attribute' may be supplied from some other schema document. > All I'm trying to do is to derive attributes and define the simple > content of the derived type in the derived type. Is that possible at > all?!? Sure, if I've understood you correctly: <?xml version="1.0" encoding="UTF-8"?> <schema xmlns="http://www.w3.org/2000/10/XMLSchema" xmlns:my="http://www.example.com/foo" targetNamespace="http://www.example.com/foo" version="0.4"> <complexType name="attribute"> <simpleContent> <extension base="anySimpleType"> <attribute name="isNullable" type="boolean" use="optional"/> <attribute name="isQueryable" type="boolean" use="optional"/> <attribute name="isUpdatable" type="boolean" use="optional"/> </extension> </simpleContent> </complexType> <element name="ShipmentNo"> <complexType> <simpleContent> <restriction base="attribute"> <simpleType> <restriction base="integer"/> </simpleType> </restriction> </simpleContent> </complexType> </element> </schema> This is a tricky case, and there should probably be a section in the Primer illustrating and explaining its use. ht -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh W3C Fellow 1999--2001, part-time member of W3C Team 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/
Received on Thursday, 30 November 2000 06:04:48 UTC