You could use this to describe, annotate, formalize your tags. But I think you'd have to extend the ontology with the concept of "mnemonics." Or perhaps tag these with one of the tagging ontology, and use those tags as the mnemonics. Something like that..?
I'd be happy to just attach key-value pairs to URLs (thus forming a triple, with the URL as the subject); My automatic a-priori thought is: "namespacing the keys is unnecessary and wasteful." I would be REALLY EXCITED if Unalog supported tags such as foo:bar (where foo is a key, bar is a value,) and some way of programmatically getting at that data.