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POLibXML - Looping through nodes until
 

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    <p>I'm trying to parse the below XML using Perl's XML::LibXML library.</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" ?&gt; &lt;TaggedPDF-doc&gt; &lt;Part&gt; &lt;Sect&gt; &lt;H4&gt;2.1 Study purpose &lt;/H4&gt; &lt;P&gt;This is study purpose content&lt;/P&gt; &lt;P&gt;content 1&lt;/P&gt; &lt;P&gt;content 2&lt;/P&gt; &lt;P&gt;content 3 &lt;/P&gt; &lt;P&gt;content 4&lt;/P&gt; &lt;P&gt;3. Some Header&lt;/P&gt; &lt;P&gt;obj content 4&lt;/P&gt; &lt;P&gt;obj content 2&lt;/P&gt; &lt;/Sect&gt; &lt;/Part&gt; &lt;/TaggedPDF-doc&gt; </code></pre> <p>For the Header Study Purpose, I'm trying to display all the related siblings. So my expected output is:</p> <pre><code>&lt;H4&gt;2.1 Study purpose &lt;/H4&gt; &lt;P&gt;This is study purpose content&lt;/P&gt; &lt;P&gt;content 1&lt;/P&gt; &lt;P&gt;content 2&lt;/P&gt; &lt;P&gt;content 3 &lt;/P&gt; &lt;P&gt;content 4&lt;/P&gt; </code></pre> <p>My Perl code is below. I can display the first node. </p> <p>Given a value of the first node,Study purpose, is there a way I can loop and print all the nodes until I hit a node containing a "digit followed by a '.'"?</p> <p>My perl implementation:</p> <pre><code>my $purpose_str = 'Purpose and rationale|Study purpose|Study rationale'; $parser = XML::LibXML-&gt;new; #print "Parser for file $file is: $parser \n"; $dom = $parser-&gt;parse_file($file); $root = $dom-&gt;getDocumentElement; $dom-&gt;setDocumentElement($root); for my $purpose_search('/TaggedPDF-doc/Part/Sect/H4') { $purpose_nodeset = $dom-&gt;find($purpose_search); foreach my $purp_node ($purpose_nodeset -&gt; get_nodelist) { if ($purp_node =~ m/$purpose_str/i) { #Get the corresponding child nodes @childnodes = $purp_node-&gt;nonBlankChildNodes(); $first_kid = shift @childnodes; $second_kid = $first_kid-&gt;nextNonBlankSibling(); #$third_kid = $second_kid-&gt;nextNonBlankSibling(); $first_kid -&gt; string_value; $second_kid -&gt; string_value; #$third_kid -&gt; string_value; } print "Study Purpose is: $first_kid\n.$second_kid\n"; } } </code></pre>
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    1. COtry `use Data::Dumper; print Dumper(@childnodes);` after you set it to see what you are really getting
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