1. Expat is a C library for parsing XML. Expat is a stream-oriented XMLparser; handlers are registered with the parser prior to starting theparse. These handlers are then called when the parser discovers the associated structures in the document being parsed. A start tag is an example of the kind of structure for which handlers can be registered. From Redhat 8.0 RPM

2. XML parsing C library - example application This package contains xmlwf, an example application of expat, the C library for parsing XML. The arguments to xmlwf are one or more files which are each to be checked for XML well-formedness. From Debian 3.0r0 APT