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In order to display graphs of altitude and (in future) user data, etc. this module used the JpGraph package:
NB:As of October 2013 development release the location of the JpGraph dependency has changed. Prior to this the the JpGraph libraries were deployed directly in the Trackfield module directory.
Place the entire JpGraph package in the sites/all/libraries directory or
symlink to whereever you put it. The directory or symlink must be named jpgraph.
Version 2+ of JpGraph is required, which only runs on PHP 5+.
Warning: Some users have reported that certain jpGraph distributions contain a symbolic link from part of the tree back to the parent directory. Installing such a distribution will cause the Drupal system into a recursive loop looking for modules. Be sure to remove any such links from your jpGraph distribution.
PHP Requirements
XML handling parts of this module require the DOMDocument PHP extension. See:
http://php.net/manual/en/class.domdocument.php
This extension only runs on PHP 5+. According to the latest (as of Mar 2011) PHP documentation this extension is enabled by default.
Comments
DOMDocument
I have downloaded what I thought to be the the right thing from the link about. However, I did not see the class.domdocument.php. I was hoping to get some clearification on how to get the DOMdocument.php.