Some NoSQL databases use indexes. Triplestores too? If yes, how to make or manage them?
I've used Virtuoso and Blazegraph and I suppose is strictly dependent on the database architecture. There isn't any standardization regarding indexing?
1 Answers
User defined indexes aren't really in the spirit of a triple store. Since all information is managed at the most atomic level possible, every possible access path into the information should have the same conceptual cost.
Compare this with a relational model where one makes explicit decisions about degree of normalization and implicit trade-offs of access performance, compensated with user defined indexes.
This doesn't mean there are no indexes in a triple store. On the contrary, all non trivial implementations use them, whether a spo/pos/ops form or maybe something based on Lucene.
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