RE: Final clause in attributes

Hi Eddie,
the problem was in the software I was using. It's Schema Quality Checker by
IBM. I wrote a feedback them already. By the way, Xerces works nice with it.
 
 
/RR

-----Original Message-----
From: Eddie Robertsson [mailto:eddie@allette.com.au]
Sent: Tuesday, June 05, 2001 02:38 
To: Roman Rytov
Cc: 'xmlschema-dev@w3.org'
Subject: Re: Final clause in attributes


Hi Roman, 

Roman Rytov wrote: 


I was trying to create a list of acceptable attribute values for my element.
Like in  Enumeration Facet example I made following: 

<xsd:simpleType name="RequestType" final="restriction"> 
                <xsd:restriction base="xsd:string"> 
                        <xsd:enumeration value="Set"/> 
                        <xsd:enumeration value="Get"/> 
                </xsd:restriction> 
</xsd:simpleType> 


After that I want to use this list in one of my element's attributes values:



<xsd:complexType name="Header"> 
        <xsd:sequence> 
                        <xsd:element name="Info" type="xsd:string"/> 
            </xsd:sequence> 
            <xsd:attribute name="Type" type="RequestType" use="required"
fixed="Set"/> 
</xsd:complexType>

If the above declaration are the only ones you with regards to the
RequestType (that is you don't have any restrictions later on in your
schema) then it is a valid schema. What validator are you using to get the
error message below? It seems strange to me that you get that error message
if you're not trying to restrict the RequestType. 

/Eddie 


but during validation the schema I get the next error message: 

The type 
<xsd:simpleType> 
    <xsd:restriction base="RequestType"/> 
</xsd:simpleType> 
was defined by restriction on the type RequestType. But according to the
definition of type RequestType (in the final attribute), 


it cannot be refined using the derivation method, restriction. To fix this
problem, either define 
<xsd:simpleType> 
    <xsd:restriction base="RequestType"/> 
</xsd:simpleType> 
 without reference to RequestType, or remove or modify the final clause in
the definition of RequestType. 
  


As you can see I didn't define another <simpleType> I just wanted to use
previously created type (RequestType) as type of my attribute (Type). What's
the problem? 


Basically I want to create a list of available values (to use as attribute
values) and restrict this list completely.