RE: [xri] XRDS schema

Yes, elements in a sequence MUST appear in
the order declared in the sequence element of the schema. My XMLSpy will reject
as invalid an instance document in which the elements are in the wrong order.
Of course, if an element is declared as optional in the schema, it may be
skipped. But elements cannot appear out of order.

 

I’m relatively certain there’s
a way to do it unordered, but a) I doubt it would be worth the work, and b)
ordering is important to many applications.

 

=Drummond 

 

From: Wachob, Gabe
[mailto:] 

Sent: Monday, April 03, 2006 10:51
AM

To: Chasen, Les;


Subject: RE: [xri] XRDS schema

 

Thats a good question. From my point of
view, the only important ordering is that the "otherelement" come
after the known (ie xrd-namespace) elements -- for ease of parsing (ie you can
tell when you are done with basic parsing when you see a non-XRD-namespace
element).

 

Others may actually like the fixed
ordering for *all* the elements...

 

    -Gabe

 

 

From: Chasen,
Les [mailto:] 

Sent: Monday, April 03, 2006 10:34
AM

To: 

Subject: [xri] XRDS schema

Hey guys –

 

Question in regard to the XRDS schema in Appendix A of WD
10.  Is it really important to force the sequence of the elements in the
XRD?

 

<xs:element name="XRD">

      <xs:complexType>

        
<xs:sequence>

           
<xs:element ref="xrd:Query" minOccurs="0"/>

           
<xs:element ref="xrd:Status" minOccurs="0"/>

           
<xs:element ref="xrd:Expires" minOccurs="0"/>

           
<xs:element ref="xrd:ProviderID" minOccurs="0"/>

           
<xs:element ref="xrd:LocalID" minOccurs="0" maxOccurs="unbounded"/>

           
<xs:element ref="xrd:CanonicalID" minOccurs="0"
maxOccurs="unbounded"/>

           
<xs:element ref="xrd:Ref" minOccurs="0"
maxOccurs="unbounded"/>

           
<xs:element ref="xrd:Service" minOccurs="0"
maxOccurs="unbounded"/>

           
<xs:group ref="xrd:otherelement" minOccurs="0"
maxOccurs="unbounded"/>

        
</xs:sequence>

        
<xs:attribute name="id" type="xs:ID"/>

        
<xs:attribute name="idref" type="xs:IDREF"
use="optional"/>

        
<xs:attribute name="version" type="xs:string"
use="optional" fixed="2.0"/>

        
<xs:attributeGroup ref="xrd:otherattribute"/>

      </xs:complexType>

   </xs:element>

 

Thanks

 

Les

 

 

 

  
  
I-Name:  =les.chasen