This tool is based on the XMLmind XML Editor (XXE for short) desktop application, but without a graphical user interface (GUI). It can be used to convert XML documents to other formats (HTML, PDF, RTF, etc) from within a script or a makefile.
Because xxeconvert shares a lot of code with XXE, this command-line utility will automatically make use of most the installed add-ons (e.g. "Apache FOP 1.x XSL-FO processor plug-in", "Apache Batik image toolkit plug-in", etc) and also of some of the last specified user preferences (e.g. conditional processing profiles).
This utility, like all the other command-line utilities, is found in
.XXE_install_dir
/bin/