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    <blockquote> <p>Should I use XPath? Is there something more efficient?</p> </blockquote> <p>I would use Ruby with the Nokogiri library, it gives you much more flexibility than just XPath/XSLT:</p> <pre><code>#!/usr/bin/ruby require 'rubygems' require 'nokogiri' src = &lt;&lt;EOS &lt;div&gt; &lt;span style="display:block;float:left;color:#888"&gt; 2:56 PM&amp;nbsp; &lt;/span&gt; &lt;span style="display:block;padding-left:6em"&gt; &lt;span&gt; &lt;span style="font-weight:bold"&gt;me&lt;/span&gt;: i'm trying to think of a good way to parse gmail chat logs &lt;/span&gt; &lt;/span&gt; &lt;span style="display:block;float:left;color:#888"&gt; &amp;nbsp;&amp;nbsp; &lt;/span&gt; &lt;span style="display:block;padding-left:6em"&gt; &lt;span&gt; and reformat that into something like an xml format &lt;/span&gt; &lt;/span&gt; &lt;/div&gt; EOS chatlog = [] last_timestamp = nil doc = Nokogiri::HTML(src) doc.xpath('//div/span').each do |span| style = span.attributes['style'].value if style.include?('color:') last_timestamp = span.content.strip elsif style.include?('padding-left:') chatlog &lt;&lt; {:timestamp =&gt; last_timestamp, :message =&gt; span.content.strip} end end builder = Nokogiri::XML::Builder.new do |doc| doc.chatlog { chatlog.each do |line| doc.line { doc.time line[:timestamp] doc.message line[:message] } end } end </code></pre> <p>Returns:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;chatlog&gt; &lt;line&gt; &lt;time&gt;2:56 PM &lt;/time&gt; &lt;message&gt;me: i'm trying to think of a good way to parse gmail chat logs&lt;/message&gt; &lt;/line&gt; &lt;line&gt; &lt;time&gt;  &lt;/time&gt; &lt;message&gt;and reformat that into something like an xml format&lt;/message&gt; &lt;/line&gt; &lt;/chatlog&gt; </code></pre>
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