- From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
- Date: 30 Nov 2000 09:57:45 +0000
- To: "Rishi Chandra" <rishi_chandra@intersolutions.stpn.soft.net>
- Cc: <xmlschema-dev@w3.org>
"Rishi Chandra" <rishi_chandra@intersolutions.stpn.soft.net> writes: > I wanted to know whether in XML-Schema there is any way in which a member > (an element defined in a complexType) can be extended/restricted (basically > sub-typed)? I wanted to define few types (which will have elements of some > other types) and then keep on evolving sub-types by extension and > restriction. Sorry for slow reply, I've been on the road (at XML Schema meetings :-). If I've understood correctly, the answer is yes. For example, given <xs:complexType name='big'> <xs:sequence> <xs:element name='sub1' type='sub1Type'/> . . . </xs:sequence> </xs:complexType> <xs:complexType name='sub1Type'> <xs:choice> <xs:element ref='part1'/> <xs:element ref='part2'/> <xs:element ref='part3'/> </xs:choice> </xs:complexType> then the following is cool <xs:complexType name='little'> <xs:complexContent> <xs:restriction base='big'> <xs:sequence> <xs:element name='sub1' type='sub1TypeTwo'/> . . . </xs:sequence> </xs:restriction> </xs:complexContent> </xs:complexType> <xs:complexType name='sub1TypeTwo'> <xs:complexContent> <xs:restriction base='sub1Type'> <xs:choice> <xs:element ref='part1'/> <xs:element ref='part2'/> </xs:choice> </xs:restriction> </xs:complexContent> </xs:complexType> 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 04:57:50 UTC