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Re: xs:group/xs:choice[@minOccurs | @maxOccurs]

• Subject: Re: xs:group/xs:choice[@minOccurs | @maxOccurs]
• From: Robert Koberg <rob@k...>
• Date: Fri, 25 Jun 2004 12:13:25 -0700
• Cc: XML Developers List <xml-dev@l...>
• In-reply-to: <039401c45ae5$5f79e090$090bbed8@PREZ>
• References: <40DC6DB3.1070007@k...> <039401c45ae5$5f79e090$090bbed8@PREZ>
• User-agent: Mozilla Thunderbird 0.7 (Macintosh/20040616)

Bryce K. Nielsen wrote:

>This email will have better response on the xmlschema-dev mailing list
>(xmlschema-dev@w...) but I'll give it a go:
>
>xs:group's limit the min/max occurs of not just choice nodes, but all
>compositors (i.e. choice, sequence and all nodes). 
>

You mean all child nodes of xs:group not all nodes in a xs:group, right?

The reason I was curious is because I have to do the following:

<xs:group>
  <xs:choice>
    <xs:element ref="elem1" minOccurs="0" maxOccurs="unbounded"/>
    <xs:element ref="elem2" minOccurs="0" maxOccurs="unbounded"/>
    <xs:element ref="elem3" minOccurs="0" maxOccurs="unbounded"/>
    <xs:element ref="elem4" minOccurs="0" maxOccurs="unbounded"/>
    <xs:element ref="elem5" minOccurs="0" maxOccurs="unbounded"/>
  </
</

When it would be much simpler to write:

<xs:group>
  <xs:choice minOccurs="0" maxOccurs="unbounded">
    <xs:element ref="elem1"/>
    <xs:element ref="elem2"/>
    <xs:element ref="elem3"/>
    <xs:element ref="elem4"/>
    <xs:element ref="elem5"/>
  </
</
(BTW,  msxml accepts this)

I suppose there might be problems (?) if you do something like:

<xs:group>
  <xs:choice minOccurs="0" maxOccurs="unbounded">
    <!--*****-->
    <xs:group ref="group1"/>
    <!--*****-->
    <xs:element ref="elem1"/>
    <xs:element ref="elem2"/>
    <xs:element ref="elem3"/>
    <xs:element ref="elem4"/>
    <xs:element ref="elem5"/>
  </
</

-Rob

>The occurence options are
>controlled by the entire group, not the individual nodes within the group.
>Why this is, I'm not entirely certain, anyone else want to field the
>reasoning behind this?
>
>Bryce K. Nielsen
>SysOnyx, Inc. (www.sysonyx.com)
>Makers of xmlLinguist, the Text-to-XML Translator
>http://www.sysonyx.com/products/xmllinguist
>
>
>----- Original Message ----- 
>From: "Robert Koberg" <rob@k...>
>To: "XML Developers List" <xml-dev@l...>
>Sent: Friday, June 25, 2004 12:23 PM
>Subject:  xs:group/xs:choice[@minOccurs | @maxOccurs]
>
>
>  
>
>>Hi,
>>
>>Why can't you have minOccurs and maxOccurs attributes on a xs:choice
>>element that is a child of a xs:group element?
>>
>>-Rob
>>    
>>

• References:
  • xs:group/xs:choice[@minOccurs | @maxOccurs]
    • From: Robert Koberg <rob@k...>
  • Re: xs:group/xs:choice[@minOccurs | @maxOccurs]
    • From: "Bryce K. Nielsen" <bryce@s...>

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