Define semantics for consumers and producers

[amrc-benmorrow]

Matching up consumers and producers requires some way of knowing that a particular metric or set of metrics actually contains the data a consumer wants. This is a semantic matching operation, and ultimately will require referencing an ontology of some kind.

A quick-and-dirty solution might be to treat the schemas repo as our ontology, and ignore the possibility that multiple schemas may contain compatible data (e.g. the two current versions of Power Monitoring). This will generate a more limited set of matches than it might, but may still be a reasonable start.