>Are there any differences between a KV-store in the form of "Bob:Knows" — "John" and a triple store in the form of "Bob" — "Knows" — "John"? Redis, for example

>Are there any differences between a KV-store in the form of "Bob:Knows" — "John" and a triple store in the form of "Bob" — "Knows" — "John"? Redis, for example, can query the first one easily by scanning. A triple store can more quickly answer queries about triples. The reason to use triples is that it is what you naturally get when you try to store structured relational data where the schema changes quickly.