Package xmlstarlet

Command Line XML Toolkit

http://xmlstar.sourceforge.net/

XMLStarlet is a set of command line utilities which can be used
to transform, query, validate, and edit XML documents and files
using simple set of shell commands in similar way it is done for
plain text files using UNIX grep, sed, awk, diff, patch, join, etc
commands.

General Commands
Command Description
xmlstarlet command line XML/XSLT toolkit