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RE: XML schema: how to define choice between value as an attri

• To: "'Bryce K. Nielsen'" <bryce@s...>,"'XML Developers List'" <xml-dev@l...>
• Subject: RE: XML schema: how to define choice between value as an attribute and value as element text
• From: "Michael Kay" <michael.h.kay@n...>
• Date: Mon, 14 Jun 2004 09:29:23 +0100
• In-reply-to: <01a001c451cf$b24a9950$050fbed8@PREZ>
• Thread-index: AcRRz6Htw/2wWR4ySPqb6O67A1kNIgAGRemg

This doesn't work.

Section 3.8.1: "When two or more particles contained directly or indirectly
in the {particles} of a model group have identically named element
declarations as their {term}, the type definitions of those declarations
must be the same." More specifically, see Schema Component Constraint:
Element Declarations Consistent.

Michael Kay

> -----Original Message-----
> From: Bryce K. Nielsen [mailto:bryce@s...] 
> Sent: 14 June 2004 05:23
> To: XML Developers List
> Subject: Re:  XML schema: how to define choice 
> between value as an attribute and value as element text
> 
> In a rather stange looking schema you could. For example:
> 
> <schema>
>   <simpleType name="PersonNameType">
>     <restriction>
>       <!-- put your restrictions here, like length and stuff -->
>     </restriction>
>   </simpleType>
> 
>   <element name="Person">
>     <complexType>
>       <choice>
> 
>         <sequence>
>           <element name="PersonName">
>             <complexType>
>               <simpleContent>
>                 <extension>
>                   <attribute name="value" type="PersonNameType"/>
>                 </extension>
>               </simpleConent>
>             </complexType>
>           </element>
>           <!-- Add all your other *attribute* elements here -->
>         </sequence>
> 
>         <sequence>
>           <element name="PersonName" type="PersonNameType"/>
>           <!-- Add all your other *element text* elements here -->
>         </sequence>
> 
> 
>       </choice>
>     </complexType>
>   </element>
> </schema>
> 
> This sort of schema would in effect do what you're looking 
> for, making all
> the nodes have either a "value" attribute, or the text of the 
> element having
> the value. The only restriction is that you couldn't do this 
> to the document
> element, since there's no way to "choice" a document element 
> with the same
> name. It's an ugly schema, IMHO, but would work.
> 
> Bryce K. Nielsen
> SysOnyx, Inc. (www.sysonyx.com)
> Makers of xmlHack, the Simple XML Editor
> http://www.sysonyx.com/products/xmlhack
> 
> 
> ----- Original Message ----- 
> From: "Patrik Beno" <pb@p...>
> To: "XML Developers List" <xml-dev@l...>
> Sent: Saturday, June 12, 2004 2:48 PM
> Subject:  XML schema: how to define choice between 
> value as an
> attribute and value as element text
> 
> 
> 
> Hey there :-)
> 
> 
> Suppose I have simple element <PersonName>.
> 
> I want to define restriction that data (person name itself) may be
> defined either in "value" attribute or as element text.
> 
> Meaning - either this way:
> 
>   <PersonName value="John Doe"/>
> 
> or this way:
> 
>   <PersonName> John Doe </PersonName>
> 
> But this is forbidden:
> 
>   <PersonName value="John Doe"> Jane Smith <PersonName>
> 
> I have been reading spec, tutorials, references, I have
> been gooooooooogling for hours but I can't find out how to do this or
> even if it is feasible at all.
> 
> Please - can this restriction be defined using XML schema?
> If so, how? Can anyone provide an example?
> 
> thnx
> 
> -- 
> Patrik Beno
> mailto:pb@p...
> 
> 
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  • Re: XML schema: how to define choice between value as an attribute and value as element text
    • From: "Bryce K. Nielsen" <bryce@s...>

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