Reasoning technique, which precomputes all triples that logically follow from the input graph and rules in a query-independent way. Both the process of extending the input graph with such newly derived triples and its final output are commonly called materialization. After such preprocessing, queries can be answered directly over the materialization, which is usually very efficient since the rules do not need to be considered any further. Materializations can be large, but they can usually be stored and handled on modern hardware as the available memory is continually increasing.

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