New issue: rules of assembly of the RP document

Section 4.4 of the 
WSRF-RP spec is fairly restrictive (normatively) in prescribing that only inline 
element refs can be used in the resource properties (RP) document schema. When 
working on WSDM we discovered that it was not quite reasonable as there may be a 
number of ways to create a valid RP schema without inlining the element refs or 
in addition to them. For example, XML Schema model groups could be used, type 
extensions/restrictions can be used, and any combination of these along with 
in-line elements refs can be used.

 

Here is an 
illustration

 

<xs:element 
name="a" .../>

<xs:element name="b" .../>

<xs:element name="c" 
.../>

<xs:element name="d" 
.../>

<xs:element name="e" 
.../>

 

Now, one could do 

 

<xs:element 
name="rpdoc">

<xs:complexType>

    
<xs:sequence>

        <xs:element ref="a" 
.../>

        <xs:element ref="b" 
.../>

        <xs:element ref="c" 
.../>

        <xs:element ref="d" 
.../>

        <xs:element ref="e" 
.../>

    
</xs:sequence>

</xs:complexType>

</xs:element>

 

Then 
also

 

<xs:group 
name="cd">

    <xs:sequence>

        <xs:element ref="c" 
.../>

        <xs:element ref="d" 
.../>

    </xs:sequence>

</xs:group>

 

<xs:element 
name="rpdoc">

<xs:complexType>

    
<xs:sequence>

        <xs:element ref="a" 
.../>

        <xs:element ref="b" 
.../>

        <xs:group ref="cd"/>

        <xs:element ref="e" 
.../>

    
</xs:sequence>

</xs:complexType>

</xs:element>

 

Then 
also

 

<xs:complexType 
name="ab">

    
<xs:sequence>

        <xs:element ref="a" 
.../>

        <xs:element ref="b" 
.../>

    
</xs:sequence>

</xs:complexType>

 

<xs:element 
name="rpdoc">

<xs:complexType>

<xs:complexContent>

<xs:extension 
base="ab">

    
<xs:sequence>

        <xs:group ref="cd"/>

        <xs:element ref="e" 
.../>

    
</xs:sequence>

</xs:extension>

</xs:complexContent>

</xs:complexType>

</xs:element>

-- Igor 
Sedukhin 
.. 
()
-- (631) 
342-4325 
.. 
1 CA Plaza, Islandia, NY 11749