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Hi Burak,
Yes, it looks like an error in the spec.
Best Regards,
George
---------------------------------------------------------------------
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com
Burak Emir wrote:
> Hello, xml-dev,
>
> I try it here because I have not received an answer on xmlschema-dev.
>
> Could someone give me an answer on this please?
>
> I always thought there was nothing difficult substitution, but stumbling
> again over this example in the primer confused me.
>
> The instances <items>...</items> with the *two* comments will surely
> never validate?? Because its *two* comments, not one?
>
> Isnt the default maxOccurs="1"? Does the example try to say "you can use
> either one of these" ?
>
> Thanks in advance,
> Burak
>
> =======
> Hello all,
>
> The XML Schema Part 0, Section 4.6 "Substitution groups" reads
> =======
>
> Example
> Declaring Elements Substitutable for comment
>
> <element name="shipComment" type="string"
> substitutionGroup="ipo:comment"/>
> <element name="customerComment" type="string"
> substitutionGroup="ipo:comment"/>
>
> When these declarations are added to the international purchase order
> schema, |shipComment| and |customerComment| can be substituted for
> |comment| in the instance document, for example:
>
> Example
> Snippet of ipo.xml <http://www.w3.org/TR/xmlschema-0/#ipo.xml> with
> Substituted Elements
>
> ....
> <items>
> <item partNum="833-AA">
> <productName>Lapis necklace</productName>
> <quantity>1</quantity>
> <USPrice>99.95</USPrice>
> <ipo:shipComment>
> Use gold wrap if possible
> </ipo:shipComment>
> <ipo:customerComment>
> Want this for the holidays!
> </ipo:customerComment>
> <shipDate>1999-12-05</shipDate>
> </item>
> </items>
> ....
>
> =====
>
> But if you check ipo.xsd elsewhere, you find:
> ...
>
> <complexType name="Items">
> <sequence>
> <element name="item" minOccurs="0" maxOccurs="unbounded">
> <complexType>
> <sequence>
> <element name="productName" type="string"/>
> <element name="quantity">
> <simpleType>
> <restriction base="positiveInteger">
> <maxExclusive value="100"/>
> </restriction>
> </simpleType>
> </element>
> <element name="USPrice" type="decimal"/>
> <element ref="ipo:comment" minOccurs="0"/> <!-- HERE -->
> <element name="shipDate" type="date" minOccurs="0"/>
> </sequence>
> <attribute name="partNum" type="ipo:SKU" use="required"/>
> </complexType>
> </element>
> </sequence>
> </complexType>
> ...
> ====
>
> Why would it be allowed to include a customerComment AND a shipComment
> ?!? My thinking goes, there should be up to one.
> Have I overlooked something?
>
> Thanks,
>
> Burak Emir
>
> http://lamp.epfl.ch/~buraq
>
>
>
>
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