XML Schema - How to do a key-value map with 2 enumerations?

[Joyce]

In my schema I have 2 enumerations, let's say, country description and
country code, and I want to use them so I can map each country
description to its precise country code (and no other).
So far I've seen I can define both keys for description and code, but
my XMLs validate even if I choose a wrong pair:

Here are my both enumerations (abbreviated)
<xs:simpleType name="COUNTRYCODE">
<xs:restriction base="xs:int">
<xs:enumeration value="4"/>
<xs:enumeration value="8"/>
<xs:enumeration value="958"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="COUNTRYDESC">
<xs:restriction base="xs:string">
<xs:maxLength value="40"/>
<xs:enumeration value="Afghanistan"/>
<xs:enumeration value="Albania"/>
<xs:enumeration value="Germany"/>
</xs:restriction>
</xs:simpleType>

And I use the "country" element as follows:

<xs:element name="COUNTRY">
<xs:complexType>
<xs:sequence>
<xs:element name="name" type="COUNTRYDESC"/>
<xs:element name="value" type="COUNTRYCODE"/>
</xs:sequence>
</xs:complexType>
</xs:element>

How should I define the map and the keys, etc. so that something like
this validates:

<COUNTRY>
<COUNTRYDESC>Germany</COUNTRYDESC>
<COUNTRYCODE>958</COUNTRYCODE>
</COUNTRY>

But this DOES NOT validate (as it's a wrong description-code pair):

<COUNTRY>
<COUNTRYDESC>Afghanistan</COUNTRYDESC>
<COUNTRYCODE>958</COUNTRYCODE>
</COUNTRY>

I'll be very grateful for any help!

 

[Stan Kitsis [MSFT]]

Hi Joyce,

You can't specify this restriction in XML Schema. Have you considered doing
it this way:

<xs:simpleType name="countryDescCode">

<xs:restriction base="xs:string">

<xs:enumeration value="Afghanistan, 4"/>

<xs:enumeration value="Albania, 8" />

<xs:enumeration value="Germany, 958"/>

</xs:restriction>

</xs:simpleType>


--
Stan Kitsis
Program Manager, XML Technologies
Microsoft Corporation

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