[DDI-users] DDI 3.0 xsd question

[Joachim Wackerow]

Hello Alerk,

It looks like a bug. It doesn't seem to make sense to allow two URN's or 
two ID's etc.

We will discuss this at the next TIC meeting and will give you feedback.

Thank you for pointing this out.

Achim

Alerk Amin wrote:
> Hello,
> 
>    I have a question about a DDI 3.0 document that I am trying to 
> validate.  I hope this is the right mailing list for this question: if 
> it is not, please let me know where I should mail this question.
>    The following snippet of XML validates properly, but it seems to me 
> like it should not:
> 
> <l:ConceptReference>
> 	<r:ID>C_1</r:ID>
> 	<r:ID>C_2</r:ID>
> </l:ConceptReference>
> 
>    Based on the documentation of the ReferenceType in reusable.xsd, the 
> Reference should have a URN, an ID, or both.  2 IDs (or 2 URNs) should 
> not be allowed.
>    In reusable.xsd, the schema for the ReferenceType contains:
> 
>        <xs:choice maxOccurs="2">
>          <xs:element ref="URN">
>            ...
>          </xs:element>
>          <xs:sequence>
>            <xs:element ref="ID">
>              ...
>            </xs:element>
>            ...
>          </xs:sequence>
>        </xs:choice>
> 
> In order to validate the way the documentation describes, it seems like 
> the scheme should instead contain:
> 
>      <xs:choice>
>        <xs:sequence>
>          <xs:element ref="URN">
>            ...
>          </xs:element>
>          <xs:sequence minOccurs="0">
>            <xs:element ref="ID">
>              ...
>            </xs:element>
>            ...
>          </xs:sequence>
>        </xs:sequence>
>        <xs:sequence>
>          <xs:sequence>
>            <xs:element ref="ID">
>              ...
>            </xs:element>
>            ...
>          </xs:sequence>
>          <xs:element ref="URN" minOccurs="0">
>            ...
>          </xs:element>
>        </xs:sequence>
>      </xs:choice>
> 
> I would appreciate any help or explanation anyone can provide about 
> this.  If my interpretation of the ReferenceType is incorrect, please 
> let me know.
>    Thank you for your help.
> 
> Best,
> Alerk
> 


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