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Re: XML Schema - Enumerated List to Allow Blank Value

• To: michael.h.kay@n...
• Subject: Re: XML Schema - Enumerated List to Allow Blank Value
• From: Eddie Robertsson <erobertsson@a...>
• Date: Thu, 08 Aug 2002 09:39:27 +1000
• Cc: "'CHIUSANO, Joseph'" <JCHIUSANO@l...>, xml-dev@l...
• References: <001501c23df1$c96f9160$6401a8c0@pcukmka>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0.0) Gecko/20020530

>
>
>><xs:simpleType name="myEnum">
>>    <xs:union>
>>        <xs:simpleType>
>>            <xs:restriction base="xs:NMTOKEN">
>>                <xs:enumeration value="A"/>
>>                <xs:enumeration value="B"/>
>>                <xs:enumeration value="C"/>
>>            </xs:restriction>
>>        </xs:simpleType>
>>        <xs:simpleType>
>>            <xs:restriction base="xs:string">
>>                <xs:enumeration value=""/>
>>            </xs:restriction>
>>        </xs:simpleType>
>>    </xs:union>
>></xs:simpleType>
>>
>>    
>>
>Why is this preferred to the more direct:
>
I'm not sure. Since the original question was about restricting the 
xs:NMTOKEN type I assumed there was an underlying reason for this 
choice. However, after thinking about this I can't really see any reason 
for deriving the enumeration from xs:NMTOKEN instead of directly from 
xs:string as in your example.

Cheers,
/Eddie

>><xs:simpleType name="myEnum">
>>        <xs:simpleType>
>>            <xs:restriction base="xs:string">
>>                <xs:enumeration value="A"/>
>>                <xs:enumeration value="B"/>
>>                <xs:enumeration value="C"/>
>>                <xs:enumeration value=""/>
>>            </xs:restriction>
>>        </xs:simpleType>
>></xs:simpleType>
>>    
>>
>
>?
>Michael Kay
>Software AG
>home: Michael.H.Kay@n...
>work: Michael.Kay@s... 
>
>  
>

• References:
  • RE: XML Schema - Enumerated List to Allow Blank Value
    • From: "Michael Kay" <michael.h.kay@n...>

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