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Re: <xs:group> name versus id attributes

• To: Anne Thomas Manes <atmanes@g...>
• Subject: Re: <xs:group> name versus id attributes
• From: Dennis Sosnoski <dms@s...>
• Date: Sat, 24 Jun 2006 11:34:23 +1200
• Cc: xml-dev@l...
• In-reply-to: <bf414ee60606231621v1eb3b877l200e0a20ed63e930@m...>
• References: <bf414ee60606231557t2eaa86fai36df88edf8a1a451@m...> <449C74CB.5070509@s...> <bf414ee60606231621v1eb3b877l200e0a20ed63e930@m...>
• User-agent: Thunderbird 1.5.0.2 (X11/20060420)

Sure looks like an error to me, especially since id is of type ID and 
ref is of type QName (besides, name is a required attribute on a group 
definition). Ah well, you have to cut the editors some slack - schema is 
so complex you can't expect them to get everything right the first time 
through (or the second time, or ...). ;-)

  - Dennis

Anne Thomas Manes wrote:
> So should I then assume that this example from the XML Schema Primer 
> is in error?
>
> <xsd:complexType name="PurchaseOrderType">
>
>   <xsd:sequence>
>     <xsd:choice>
>       <xsd:group   ref="shipAndBill"/>
>       <xsd:element name="singleUSAddress" type="USAddress"/>
>     </xsd:choice>
>
>     <xsd:element ref="comment" minOccurs="0"/>
>     <xsd:element name="items"  type="Items"/>
>   </xsd:sequence>
>   <xsd:attribute name="orderDate" type="xsd:date"/>
>
> </xsd:complexType>
>
> <xsd:group id="shipAndBill">
>   <xsd:sequence>
>     <xsd:element name="shipTo" type="USAddress"/>
>     <xsd:element name="billTo" type="USAddress"/>
>
>   </xsd:sequence>
> </xsd:group>
> The group should be defined as:
>
>         <xsd:group name="shipAndBill">
>
> Thanks,
> Anne
>
> On 6/23/06, *Dennis Sosnoski* <dms@s... 
> <mailto:dms@s...>> wrote:
>
>     Hi Anne,
>
>     All the schema elements have an optional id attribute, which is just a
>     standard ID-type value (basically a non-namespaced name that can
>     be used
>     to reference the element, using values of type IDREF, anywhere within
>     the document). Even though schema includes the id attribute on all the
>     elements AFAIK it doesn't define any use for the id. The name
>     attribute
>     is what defines the name by which the group will be referenced,
>     with the
>     namespace of that name controlled by the schema targetNamespace
>     attribute.
>
>       - Dennis
>
>     Anne Thomas Manes wrote:
>     > Can someone explain to me the difference between the name and id
>     > attributes in the <xs:group> element?
>     >
>     > Thanks,
>     > Anne
>
>

• References:
  • <xs:group> name versus id attributes
    • From: "Anne Thomas Manes" <atmanes@g...>
  • Re: <xs:group> name versus id attributes
    • From: Dennis Sosnoski <dms@s...>
  • Re: <xs:group> name versus id attributes
    • From: "Anne Thomas Manes" <atmanes@g...>

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