how to handle namespaces

[TheApApp]

I have an rdf XML that uses namespaces. Can this be handled? For example

<rdf:tag
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
rdf:tag2SomeValue</rdf:tag2>
</rdf:tag>

I understand that I can use xml = xml.parser(str)
and then access via xml["rdf:tag2]
but I don't believe you can use the
xml.rdf:tag2
notation. How would I be able to access using the second approach?