I'm certainly not claiming that this is the best way to do it (and I'm not really claiming anything at all...even I don't use this anymore)...but I once put in place an example of how to deal with either XML or HTML (via HTML::TableExtract) that worked pretty well, for the task and the time: PerlMonks::StatsWhore
As I said, that whole effort has fallen way by the wayside. I'm curious to see what you come up with in the sense of layering a common interface over the different methods of retrieval/parsing on the back end.
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