I don't know if this may be a "feature request" or i'm still too newbie to be able to find this in documentation

I'm now working to a platform that would to proofly tags (by company , products, and so on) professional feed content. Thing that i can do well "before save/after save new" by autotag rules.

Problem is that at the moment vocabularies are daily updated after feeds were downloaded. Than i'm looking for a way to "re-tag" existing content that is not still been tagged.

May be one way could be to build a View/VBO and to "resave" untagged feeds so rules can autotag "new content" again? I think this couldn't be doable given that content will be updated and not saved as new.

Could someone rules expert give me an opinion and an hint?

Thanks to all