Re: NewBie Question

Hi,

Well, *just as a note*, this is a case that has a direct support in 
Relax NG, the anyName nameclass or * in compact syntax:

start =
   element root {
     element * {
       text
       & element LocalVariables {
           (element l_start { text },
            element l_end { text })
           | (element l_first { text },
              element l_second { text },
              element l_third { text })
         }
     }+
   }

or

<?xml version="1.0" encoding="UTF-8"?>
<grammar xmlns="http://relaxng.org/ns/structure/1.0"
     xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
     datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
     <start>
         <element name="root">
             <oneOrMore>
                 <element>
                     <anyName/>
                     <interleave>
                         <text/>
                         <element name="LocalVariables">
                             <choice>
                                 <group>
                                     <element 
name="l_start"><text/></element>
                                     <element name="l_end"><text/></element>
                                 </group>
                                 <group>
                                     <element 
name="l_first"><text/></element>
                                     <element 
name="l_second"><text/></element>
                                     <element 
name="l_third"><text/></element>
                                 </group>
                             </choice>
                         </element>
                     </interleave>
                 </element>
             </oneOrMore>
         </element>
     </start>
</grammar>

Best Regards,
George
---------------------------------------------------------------------
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com


Hämmer Wolfgang wrote:
> 
> Salut Pete, Henry, George,
>  
> I will follow all the leads you all gave me. This is a great mailing list!!!
> Thanks a lot for your help!
>  
> Best regards, Wolf
> 
>     -----Original Message-----
>     *From:* xmlschema-dev-request@w3.org
>     [mailto:xmlschema-dev-request@w3.org]*On Behalf Of *Pete Hendry
>     *Sent:* Donnerstag, 23. Juni 2005 14:19
>     *To:* xmlschema-dev@w3.org
>     *Subject:* Re: NewBie Question
> 
>     The weakness here is that you rely on the sender adding xsi:type to
>     the instance to get validation. If you do not control the sender
>     then this could be a problem. You will not know whether the parser
>     validated each element or not unless you check that xsi:type is
>     present on each which would likely mean you have to parse to DOM and
>     check each place where this could be present in the instance. That
>     is, if you require validation. If you don't then it doesn't matter.
> 
>     The general problem with this approach is that the schema defines a
>     contract on the document. The contract being defined would say that
>     any element is allowed but there is no way to say that only elements
>     of a specific type are allowed. So the contract being defined is not
>     specific enough to use the schema without out-of-band information.
> 
>     Pete
> 
>     Henry S. Thompson wrote:
> 
>>-----BEGIN PGP SIGNED MESSAGE-----
>>Hash: SHA1
>>
>>Hämmer Wolfgang writes:
>>
>>  
>>
>>>I don't know these name in advance.
>>>    
>>
>>
>>Another option is to use xsi:type in the instance -- see the XML
>>Schema Primer, particularly section 4.7 [1] (but you don't want to
>>make your type abstract).  You'll end up with e.g.
>>
>> <TableDropBanana xsi:type="CommonType">
>>  ...
>>  <LocalVariables>...</LocalVariables>
>> </TableDropBanana>
>>
>>Ultimate fallback is to use lax validation and give LocalVariables a
>>top-level declaration, and at least it and its contents will get
>>validated properly.
>>
>>ht
>>
>>[1] http://www.w3.org/TR/xmlschema-0/#abstract
>>- -- 
>> Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
>>                     Half-time member of W3C Team
>>    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
>>            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
>>                   URL: http://www.ltg.ed.ac.uk/~ht/
>>[mail really from me _always_ has this .sig -- mail without it is forged spam]
>>-----BEGIN PGP SIGNATURE-----
>>Version: GnuPG v1.2.6 (GNU/Linux)
>>
>>iD8DBQFCuotGkjnJixAXWBoRAs4BAJ4+2iHlT3lEMFhfR0pT0cIMyo7UIACfX/Dq
>>tzMWVtQujpdVbNW80MyKPBs=
>>=a61e
>>-----END PGP SIGNATURE-----
>>
>>  
> 
>  
>  
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Received on Thursday, 23 June 2005 14:05:26 UTC