Made as simple as possible, but not simpler.
Translating Identifiers
Don’t. Identifiers should be opaque. If you’re given an owl:sameAs assertion from a party you trust, use that.
Indexing Translators and Traces
Is a metadata record “almost” expressed in the same language you used for your filter criteria?
Indexing Validators
Why would one consider indexing validators? Reuse. The value of reuse seems obvious for structural and semantic specification, i.
Indexing Identifiers
Indexing identifiers is key to disambiguating entities. Wikipedia has disambiguation pages.