future

In the future I would like to migrate ID from Flickr to a visual Wiki site that uses SVG to do the diagrams in such a way as machine-readable metadata can be added to the diagrams so that, for example, looking at a diagram that has LL blue information (using SD colours) can link to other diagrams with LL blue info, or can switch to LL amber (using the spectrum colours). Just vague ideas at this stage, does anybody have any comments to make? Something like CogMap using mxGraph is what I'm thinking of with some sites I've discovered, again, any comments?

Update: Gliffy is a much more powerful tool than mxGraph.