OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]
RE: [xml-dev] Performance Vs Size of XSD + Extension of restriction

> I want my 'ChildType' to inherit the restrictions 'minLength' 
> and 'whiteSpace' from 'OrigType' and has its own 'maxLength'. 
> So will the following info solve the requirements relating to 
> both syntax and semantics?
> <xs:simpleType name="OrigType">
> 	<xs:restriction base="xs:string">
> 		<xs:minLength value="1"/>
> 		<xs:maxLength value="20"/>
> 		<xs:whiteSpace value="collapse"/>
> 	</xs:restriction>
> </xs:simpleType>
> <xs:simpleType name="ChildType">
> 	<xs:restriction base="OrigType">
> 		<xs:maxLength value="40"/>
> 	</xs:restriction>
> </xs:simpleType>

No. When type R is derived from type B by restriction, then every valid
instance of R must also be a valid instance of B. So ChildType can't permit
things (such as strings of length 30) which OrigType prohibits.

Michael Kay

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]

News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 1993-2007 XML.org. This site is hosted by OASIS