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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@sosnoski.com
> <mailto:dms@sosnoski.com>> 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
>
>
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