- From: Guillaume Lebleu <gl@brixlogic.com>
- Date: Tue, 11 Mar 2008 10:11:08 -0700
- To: xmlschema-dev@w3.org
I know techniques for extensible enumerations in W3C XML Schema 1.0 have been discussed on this list before (extensively), but I didn't find the exact technique below, so I thought I'd post it here to get feedback/comment. Enumeration types (say, Enumerated_Type) are defined as xs:union between a Enumerated_Type_Base and Enumerated_Type_Ext in a base XSD file: <xs:simpleType name="Enumerated_Type"> <xs:union memberTypes="Enumerated_Type_Base Enumerated_Type_Ext"/> </xs:simpleType> <xs:simpleType name="Enumerated_Type_Base"> <xs:restriction base="xs:NMTOKEN"> <xs:enumeration value="ExistingValue"/> ... </xs:restriction> </xs:simpleType> <xs:simpleType name="Enumerated_Type_Ext"> <xs:restriction base="xs:NMTOKEN"/> </xs:simpleType> In the xs:redefine section of a separate extension XSD file redefines the Enumerated_Type_Ext: <xs:simpleType name="Enumerated_Type_Ext"> <xs:restriction base="Enumerated_Type_Ext"> <xs:enumeration value="ExtendedValue"/> </xs:restriction> </xs:simpleType> XSLT stylesheets are then optionally used to remove xs:redefine and xs:union given that many tools (particularly XML/OO language binders) do not support these constructs. Thanks in advance, Guillaume
Received on Tuesday, 11 March 2008 17:11:26 UTC