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Re: Xpath query to return "NULL" values?

From: Martin Honnen <mahotrash@-----.-->
To: NULL
Date: 6/6/2009 12:03:00 PM
Mario Splivalo wrote:

> <itemList>
>   <item fieldName="name">Mario</item>
>   <item fieldName="age">29</item>
>   <item fieldName="height"></item>
> </itemList>
> 
> What I'm trying to get is a rowset or table, since I'm doing this from
> postgres. So, my table would look like this:
> 
> fieldName      fieldValue
> name           Mario
> age            29
> height         NULL
> 
> The idea was to have two XPath queries on the original XML. First one
> ('/itemList/item/@fieldName') would extract all the attributes, and second
> one would extract all the 'values' ('/itemList/item/text()'). Now I guess
> I'll have to extract the nodes, as you've suggested, and then for each node
> chech if it's empty or not.

Are you using XPath inside of XSLT? There is no need to use foo/text() 
to get the string value of a 'foo' element, an element does have a 
string value of its own for instance with XSLT
   <xsl:value-of select="foo"/>
would suffice. If you are using an XPath API then check how it allows 
you to extract the string value of a node.


-- 

	Martin Honnen
	http://msmvps.com/blogs/martin_honnen/


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