- From: Pete Cordell <petexmldev@codalogic.com>
- Date: Fri, 2 Dec 2011 16:55:17 -0000
- To: "C. M. Sperberg-McQueen" <cmsmcq@blackmesatech.com>, "Jeni Tennison" <jeni@jenitennison.com>
- Cc: "C. M. Sperberg-McQueen" <cmsmcq@blackmesatech.com>, <www-xml-schema-comments@w3.org>, "HTML Data Task Force WG" <public-html-data-tf@w3.org>, "RDFa WG" <public-rdfa-wg@w3.org>, <public-html-xml@w3.org>
Original Message From: "C. M. Sperberg-McQueen" > It would be an interesting exercise to specify both an extension type > with its own value space and lexical mapping, and a type usable in > processors which don't support the extension type. I think the XML > Schema WG might be interested in collaborating on a document with > such a specification; if the WG isn't interested as a group, I expect that > some individuals in the WG may be interested. From the XML Schema > WG's point of view, such a document would probably be interesting and > worth working on even if some of those interested in HTML5 and RDF > were to decide they don't care to use it. In case you're looking for an 'automated' solution I came up with the following syntax. My concern with Jeni's approach was that it was very good with parsing an XML value into it's component parts, and converting from one form to another, but I couldn't readily see how it worked for converting something like a Java object (e.g. class Date{ private int year; private int month;...};) to an XML value. But then maybe that's only a niche problem. In the two examples below I've used the 'format' attribute to describe how a value should be formatted for output (based on C and Java format specifiers) and used the 'condition' attribute to indicate when a particular block of data should be output. I've described it as an extension that can be plugged into an XSD. HTH! <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsdt="http://www.w3.org/2001/XMLSchemaDataTypes"> <xs:simpleType name="date"> <xs:restriction base="xs:string"> <xsdt:compoundType> <xsdt:sequence> <xsdt:value name='year' type='xs:int' format='04d'/> <xsdt:literal value='-'/> <xsdt:value name='month' format='02d'> <xs:simpleType> <xs:restriction base='xs:int'> <xs:minInclusive value='1'/> <xs:maxInclusive value='12'/> </xs:restriction> </xs:simpleType> </xsdt:value> <xsdt:literal value='-'/> <xsdt:value name='day' format='02d'> <xs:simpleType> <xs:restriction base='xs:int'> <xs:minInclusive value='1'/> <xs:maxInclusive value='31'/> </xs:restriction> </xs:simpleType> </xsdt:value> <xsdt:sequence> </xsdt:compoundType> </xs:restriction> </xs:simpleType> </xs:schema> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsdt="http://www.w3.org/2001/XMLSchemaDataTypes"> <xs:simpleType name="duration"> <xs:restriction base="xs:string"> <xsdt:compoundType name='duration'> <xsdt:sequence> <xsdt:literal name='isNeg' value='-' minOccurs='0' condition='isNeg'/> <xsdt:literal value='P'/> <xsdt:sequence minOccurs='0'> <xsdt:value name='years' type='xs:unsignedInt'/> <xsdt:literal value='Y'/> </xsdt:sequence> <xsdt:sequence minOccurs='0'> <xsdt:value name='months' type='xs:unsignedInt'/> <xsdt:literal value='M'/> </xsdt:sequence> <xsdt:sequence minOccurs='0'> <xsdt:value name='days' type='xs:unsignedInt'/> <xsdt:literal value='D'/> </xsdt:sequence> <xsdt:sequence minOccurs='0' condition='hours>0 || minutes>0 || seconds>0'> <xsdt:literal value='T'/> <xsdt:sequence minOccurs='0' condition='hours>0'> <xsdt:value name='hours' type='xs:unsignedInt'/> <xsdt:literal value='H'/> </xsdt:sequence> <xsdt:sequence minOccurs='0' condition='minutes>0'> <xsdt:value name='minutes' type='xs:unsignedInt'/> <xsdt:literal value='M'/> </xsdt:sequence> <xsdt:sequence minOccurs='0' condition='seconds>0'> <xsdt:value name='seconds' type='unsignedFloat'/> <xsdt:literal value='M'/> </xsdt:sequence> </xsdt:sequence> </xsdt:sequence> </xsdt:compoundType> </xs:restriction> </xs:simpleType> </xs:schema> Pete Cordell Codalogic Ltd Interface XML to C++ the easy way using C++ XML data binding to convert XSD schemas to C++ classes. Visit http://codalogic.com/lmx/ or http://www.xml2cpp.com for more info
Received on Friday, 2 December 2011 16:55:50 UTC