title: Quick Way to Validate XML/Identify Point of Brokenness
body: <p>How does one check the validity of an XML file to show where the xml error occurs?</p>
  <p>Firefox can do it, but I'd like to do it in linux/windows command line.</p>
  <p>eg.  I've got a large-ish (90MB) XML file from Excel, saved in XML Spreadsheet 2003 format. It contains various invalid data, so that Firefox spits out messages like this:</p>
  <pre><code>Line Number 790402, Column 65:
  &lt;Cell ss:StyleID=&quot;s18&quot;&gt;&lt;Data ss:Type=&quot;String&quot;&gt;Here's some data I&amp;#5;?Bnternational&lt;/Data&gt;&lt;/Cell&gt;
  </code></pre>
  <p>Firefox is quite slow at parsing my XML(presumably because it's keeping it all in memory ready to render into a nice navigable tree). I'm not bothered about validation against an XSD, just want to know if the XML is well-formed.</p>