@hackage hexpat0.3

Expat (http://expat.sourceforge.net/) is a stream-oriented XML parser written in C. It is known for being simple and fast.

There are already nice XML libraries in the Text.XML hierarchy. The reason to use Expat is when speed is of concern. From a benchmark that compares getting the length of the root node of a HaXml tree (presumably forcing parsing the entire file) against running an Expat parser with a registered start node handler, Expat is about 12 times faster. This is not a fair benchmark; HaXml does a lot more than this Expat library. But if Expat suffices, it is good for what it does.