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POxpath - matching value of child in current node with value of element in parent
 

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  1. POxpath - matching value of child in current node with value of element in parent
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    <p>Edit: I think I found the answer but I'll leave the open for a bit to see if someone has a correction/improvement.</p> <p>I'm using xpath in Talend's etl tool. I have xml like this:</p> <pre><code>&lt;root&gt; &lt;employee&gt; &lt;benefits&gt; &lt;benefit&gt; &lt;benefitname&gt;CDE&lt;/benefitname&gt; &lt;benefit_start&gt;2/3/2004&lt;/benefit_start&gt; &lt;/benefit&gt; &lt;benefit&gt; &lt;benefitname&gt;ABC&lt;/benefitname&gt; &lt;benefit_start&gt;1/1/2001&lt;/benefit_start&gt; &lt;/benefit&gt; &lt;/benefits&gt; &lt;dependent&gt; &lt;benefits&gt; &lt;benefit&gt; &lt;benefitname&gt;ABC&lt;/benefitname&gt; &lt;/benefit&gt; &lt;/dependent&gt; </code></pre> <p> </p> <p>When parsing benefits for dependents, I want to get elements present in the employee's benefit element. So in the example above, I want to get 1/1/2001 for the dependent's start date. I want 1/1/2001, not 2/3/2004, because the dependent's benefit has benefitname ABC, matching the employee's benefit with the same benefitname.</p> <p>What xpath, relative to /root/employee/dependent/benefits/benefit, will yield the value of benefit_start for the benefit under parent employee that has the same benefit name as the dependent benefit name? (Note I don't know ahead of time what the literal value will be, I can't just look for 'ABC', I have to match whatever value is in the dependent's benefitname element.</p> <p>I'm trying: </p> <p>../../../benefits/benefit[benefitname=??what??]/benefit_start </p> <p>I don't know how to refer to the current node's ancestor in the middle of the xpath (since I think "." at the point I have ??what?? will refer to the benefit node of the employee/benefits.</p> <p>EDIT: I think what I want is "current()/benefitname" where the ??what?? is. Seems to work with saxon, I haven't tried it in the etl tool yet.</p>
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