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Mark MaltbySubject: Is it possible to have empty dates in xml?
Author: Mark Maltby
Date: 21 Jun 2006 04:54 AM
If I have a xml node of a type date or dateTime and that node is empty, when i go to validate it against the schema, i get the following error:

Error parsing '' as date datatype.
The element: 'TargetDate' has an invalid value according to its data type.

Currently I have been not writing this node to the xml file to get around this problem, but this doesn't seem to be the best solution. What if I want to visually display that this node exists and still can be empty. What am I not understanding about the basic rules? Is there any other data type that work this way?

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Alberto MassariSubject: Re: Is it possible to have empty dates in xml?
Author: Alberto Massari
Date: 21 Jun 2006 05:09 AM
Hi Mark,
in order to allow an empty element you need to:
1) mark the element definition in the schema as "nillable" adding the
attribute nillable="true"
2) add the xsi:nil="true" to the empty instance in the XML file

Hope this helps,
Alberto

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Mark MaltbySubject: Re: Is it possible to have empty dates in xml?
Author: Mark Maltby
Date: 21 Jun 2006 05:16 AM
Thanks for your suggestion, but I should of mentioned that I have already tried this. I attach a simple example for you to view.

I use the MSXML4 processor if this makes a difference.


UnknownMyDate.xml


Unknownmydate.xsd

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Alberto MassariSubject: Re: Is it possible to have empty dates in xml?
Author: Alberto Massari
Date: 21 Jun 2006 06:19 AM
Hi Mark,
in your XML fragment there is no xsi:nil attribute (the "nillable" attribute in the schema simply tells that the element *may* be empty in some cases, but it's the xsi:nil attribute in the XML file that marks that specific element as being without value).

Please find attached a correct XML file.

Alberto


UnknownMyDate(1).xml
Corrected XML file

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Mark MaltbySubject: Re: Is it possible to have empty dates in xml?
Author: Mark Maltby
Date: 21 Jun 2006 06:33 AM
Thanks for your help. Is working now

 
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