From: Dejan Dimic <dejan.dimic@...>
Date: 2008-08-11T07:07:56+09:00
Subject: Re: Using XPath to retrieve an XML element which contains a given 	text

On Aug 10, 9:37 pm, anne001 <a...@wjh.harvard.edu> wrote:
> This code returns the first dataformat element.
> And yet the second dataformat is the one containing SPPT.
> What am I doing wrong?
>
> require "rexml/document"
>
> include REXML
>
> string = <<EOF
>   <dataformats>
>       <dataformat>
>                 <fileidentifiers>
>                         <fileidentifier>CFMT</fileidentifier>
>                 </fileidentifiers>
>         </dataformat>
>       <dataformat>
>                 <fileidentifiers>
>                         <fileidentifier>SPPT</fileidentifier>
>                 </fileidentifiers>
>       </dataformat>
>   </dataformats>
> EOF
>
> doc = Document.new string
> xpathquery="//dataformat[contains(fileidentifier, SPPT)]"
> p XPath.first(doc,xpathquery).to_s

I think you XPath query should be:
xpathquery="//dataformat[contains(., 'SPPT')]"

or more specific one:
xpathquery="//dataformat[contains(fileidentifiers/
fileidentifier,'SPPT')]"