• To: Robert Koberg <rob@k...>
• Subject: Re: can you use inheritance (extension) in relax ng?
• From: James Clark <jjc@j...>
• Date: 25 Oct 2003 14:29:47 +0700
• Cc: "\"xml-dev@l...\"" <xml-dev@l...>
• In-reply-to: <200310250517.h9P5Hkb10467@s...>
• Organization:
• References: <200310250517.h9P5Hkb10467@s...>

On Sat, 2003-10-25 at 12:17, Robert Koberg wrote:
> Hi,
> 
> I was wondering how something like this would be represented in RNG:
> 
> <xs:complexType name="SiteNode">
>     <xs:sequence>
>       <xs:group ref="lsb:core.elems"/>
>     </xs:sequence>
>     <xs:attributeGroup ref="lsb:navigable.attrs"/>
>   </xs:complexType>
> 
> <xs:element name="folder">
>     <xs:complexType>
>       <xs:complexContent>
>         <xs:extension base="lsb:SiteNode">
>           <xs:sequence>
>             <xs:group ref="lsb:folder.elems"/>
>           </xs:sequence>
>         </xs:extension>
>       </xs:complexContent>
>     </xs:complexType>
>   </xs:element>
> 
> Does RNG support extending elements like above?

Yes, since RNG patterns handle both elements and attributes, you can do
extension just by referencing the base definition.  In compact syntax:

SiteNode = core.elems, navigable.attrs
folder = element folder { SiteNode, folder.elems }

James

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