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POExtract nodes from xml based on keywords
 

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    <p>I have an XML like below and am trying to extract the nodes based on a keyword. Tried using XPath and XMLLint. But obviously, I'm not doing something right. So hoping for some help in this regard.</p> <p>XML File</p> <pre><code> &lt;section&gt; &lt;h&gt;2 Introduction&lt;/h1&gt; &lt;region&gt;Intro 1&lt;/region&gt; &lt;region&gt;Background&lt;/region&gt; &lt;/section&gt; &lt;article&gt; &lt;body&gt; &lt;section&gt; &lt;h1&gt;2 Task objectives&lt;/h1&gt; &lt;region&gt;2.1 Primary objectives &lt;/region&gt; &lt;region&gt;2.&lt;/region&gt; &lt;/section&gt; &lt;section&gt; &lt;h2&gt;Requirements&lt;/h1&gt; &lt;region&gt;System Requirements &lt;/region&gt; &lt;region&gt;Technical Requirements&lt;/region&gt; &lt;/section&gt; &lt;section&gt; &lt;h3&gt;Design&lt;/h1&gt; &lt;region&gt;Design methodology &lt;/region&gt; &lt;region&gt;Design patterns&lt;/region&gt; &lt;/section&gt; &lt;/body&gt; &lt;/article&gt; </code></pre> <p>Given this XML and a keyword <code>Task objectives</code> or <code>objectives</code> (Case insensitive), I need to extract the entire node and write to another XML file</p> <pre><code>&lt;section&gt; &lt;h1&gt;2 Task objectives&lt;/h1&gt; &lt;region&gt;2.1 Primary objectives &lt;/region&gt; &lt;region&gt;2.&lt;/region&gt; &lt;/section&gt; </code></pre> <p>The extraction piece I tried using Xpath and XMllint.</p> <pre><code> $ xmllint --xpath //body//section//h1[.="Task objectives"] Prior.mod.xml XPath error : Invalid predicate //body//section//h1[.=Task objectives] ^ xmlXPathEval: evaluation failed XPath evaluation failure </code></pre> <p>Could anyone please let me know what is wrong with the above and how I can fix it? Also, I'd like to do this in a shell on a directory of files. Is XMLlint the best option?</p>
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