We have other methods which will traverse the DOM and work out the different xml:base declarations we need to be aware of. We then need to combine them.
Dublin Core provides the dc:creator, dc:contributor, and dc:publisher elements for defining authorship in RSS1. We will try each of those in turn in order to simulate the atom author element and will return it as text.
This is not really something that will work with RSS1 as it does not have clear restrictions on the global uniqueness of IDs. We will employ the _very_ hit and miss method of selecting entries based on the rdf:about attribute.