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Re: W3C Schema Question

• To: "CHIUSANO, Joseph" <JCHIUSANO@l...>
• Subject: Re: W3C Schema Question
• From: Eddie Robertsson <erobertsson@a...>
• Date: Thu, 26 Sep 2002 09:35:13 +1000
• Cc: xml-dev@l...
• References: <3A967FE7B99E134C9FE65E2C136560301B0D4A@l...>
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1) Gecko/20020826

Hi Joe,

>I have a situation in which I need to anticipate the possibility of 2 different datatypes in a single XML element (I'm thinking xsi:type right now, but I'll continue).  I have an element that can either be a date, or an asterisk.  The date or asterisk will always appear in the same element - i.e. there are not separate elements for these.  So we can have:
>
><MyElement>2002-02-02</MyElement>
>
>in one XML document, and then:
>
><MyElement>*</MyElement>
>
>in another.
>
>Is there an efficient way to handle this within a single schema, ensuring that invalid dates are detected?
>
This looks like a perfect scenario where you can use a union type. 
Something like this would do the trick:

<xs:simpleType name="dateAsterisk">
    <xs:union memberTypes="xs:date">
        <xs:simpleType>
            <xs:restriction base="xs:string">
                <xs:enumeration value="*"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:union>
</xs:simpleType>

Cheers,
/Eddie

>
>Kind Regards,
>Joe Chiusano
>LMI
>
>  
>
>>**************************************************************************
>>  Joseph M. Chiusano
>>  Logistics Management Institute
>>  2000 Corporate Ridge
>>  McLean, VA 22102
>>  Email: jchiusano@l...
>>  Tel: 571.633.7722
>>**************************************************************************
>>
>>
>>    
>>
>
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• References:
  • W3C Schema Question
    • From: "CHIUSANO, Joseph" <JCHIUSANO@l...>

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