Parsing XML using unix terminal

Sometimes I need to quickly extract some arbitrary data from XML files to put into a CSV format. What's your best practices for doing this in the Unix terminal? I would love some code examples, so for instance how can I get the following problem solved?

Example XML input:

<root>
    <myel name="Foo" />
    <myel name="Bar" />
</root>

My desired CSV output:

Foo,
Bar,