Schema attribute restriction

[nicolaspujol@yahoo.com]

Hi, wondering if anybody could help me figure how to. in schema,
restrict the list of tokens I may have as an attribute value. For
example

<xs:complexTy pe name="customer" >
<xs:sequence>
<xs:element name="firstname " type="xs:string "/>
</xs:sequence>
<xs:attribute name="life" use="optional">
<xs:simpleTyp e>
<xs:restricti on base="xs:NMTOKE N">
<xs:enumerati on value="session"/>
<xs:enumerati on value="request"/>
<xs:enumerati on value="context"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:complexType>

I would like "Norwegian_cust omer" to extend from customer but to allow
for the "life" attribute only the "session" value. This is what I am
doing so far but is not correct.

<xs:complexTy pe name="Norwegian _customer">
<xs:complexCont ent>
<xs:restricti on base="pf:custom er">
<xs:sequence>
<xs:element name="firstname " type="xs:string "/>
</xs:sequence>
<xs:attribute name="life" use="optional">
<xs:simpleTyp e>
<xs:restricti on base="xs:NMTOKE N">
<xs:enumerati on value="session"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:restriction>
</xs:complexConte nt>
</xs:complexType>


Thanks in advance

[Priscilla Walmsley]

Re: Schema attribute restriction

Hi,

In order for this to work, the simple type of "life" in
Norwegian_custo mer has to explicitly say it is a restriction of the
simple type of "life" in customer. For this, you need to use a named
simple type, like this:

<xs:complexTy pe name="customer" >
<xs:sequence>
<xs:element name="firstname " type="xs:string "/>
</xs:sequence>
<xs:attribute name="life" use="optional" type="lifetype"/>
</xs:complexType>

<xs:simpleTyp e name="lifetype" >
<xs:restricti on base="xs:NMTOKE N">
<xs:enumerati on value="session"/>
<xs:enumerati on value="request"/>
<xs:enumerati on value="context"/>
</xs:restriction>
</xs:simpleType>

<xs:complexTy pe name="Norwegian _customer">
<xs:complexCont ent>
<xs:restricti on base="pf:custom er">
<xs:sequence>
<xs:element name="firstname " type="xs:string "/>
</xs:sequence>
<xs:attribute name="life" use="optional">
<xs:simpleTyp e>
<xs:restricti on base="lifetype" >
<xs:enumerati on value="session"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
</xs:restriction>
</xs:complexConte nt>
</xs:complexType>

Hope that helps,
Priscilla
----------------------------------
Priscilla Walmsley
Author, Definitive XML Schema

http://www.datypic.com

----------------------------------

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[NP]

Re: Schema attribute restriction

Thanks , though XMLSpy allows it , it does not seem able to validate it
using MSXML.

Thanks


Priscilla Walmsley wrote:[color=blue]
> Hi,
>
> In order for this to work, the simple type of "life" in
> Norwegian_custo mer has to explicitly say it is a restriction of the
> simple type of "life" in customer. For this, you need to use a named
> simple type, like this:
>
> <xs:complexTy pe name="customer" >
> <xs:sequence>
> <xs:element name="firstname " type="xs:string "/>
> </xs:sequence>
> <xs:attribute name="life" use="optional" type="lifetype"/>
> </xs:complexType>
>
> <xs:simpleTyp e name="lifetype" >
> <xs:restricti on base="xs:NMTOKE N">
> <xs:enumerati on value="session"/>
> <xs:enumerati on value="request"/>
> <xs:enumerati on value="context"/>
> </xs:restriction>
> </xs:simpleType>
>
> <xs:complexTy pe name="Norwegian _customer">
> <xs:complexCont ent>
> <xs:restricti on base="pf:custom er">
> <xs:sequence>
> <xs:element name="firstname " type="xs:string "/>
> </xs:sequence>
> <xs:attribute name="life" use="optional">
> <xs:simpleTyp e>
> <xs:restricti on base="lifetype" >
> <xs:enumerati on value="session"/>
> </xs:restriction>
> </xs:simpleType>
> </xs:attribute>
> </xs:restriction>
> </xs:complexConte nt>
> </xs:complexType>
>
> Hope that helps,
> Priscilla
> ----------------------------------
> Priscilla Walmsley
> Author, Definitive XML Schema
> http://www.datypic.com
> ----------------------------------
>
> *** Sent via Developersdex http://www.developersdex.com ***
> Don't just participate in USENET...get rewarded for it![/color]

[Priscilla Walmsley]

Re: Schema attribute restriction

What error message are you getting? Maybe if you post your whole schema
and instance it will be more obvious what is wrong.

Priscilla

----------------------------------
Priscilla Walmsley
Author, Definitive XML Schema

http://www.datypic.com

----------------------------------

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