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Re: XPath challenge: can you simplify this XPath expression?

• From: John Snelson <john.snelson@o...>
• To: "Costello, Roger L." <costello@m...>
• Date: Mon, 11 May 2009 16:50:47 +0100

I'll start.

count(Author) ge 0 == true()

So you can eliminate that from the predicate.

John

Costello, Roger L. wrote:
> Hi Folks,
> 
> I created an XPath expression and I am wondering if it can be simplified.
> 
> The XPath expresses this:
> 
>    There must be one child Title element and
>    there must be zero or more child Author elements and
>    there must be one child Date element and
>    nothing else.
> 
> 
> Here's the XPath 2.0 expression I created:
>   
>    count(Title) eq 1 and
>    count(Author) ge 0 and
>    count(Date) eq 1 and
>    count(*[not(name() = ('Title','Author','Date'))]) eq 0
> 
> 
> I think this is the simplest possible XPath, but perhaps you can see a simpler expression?
> 
> /Roger
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-- 
John Snelson, Oracle Corporation            http://snelson.org.uk/john
Berkeley DB XML:            http://oracle.com/database/berkeley-db/xml
XQilla:                                  http://xqilla.sourceforge.net

• References:
  • XPath challenge: can you simplify this XPath expression?
    • From: "Costello, Roger L." <costello@m...>