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RQL is a typed language following a functional approach (a la ODMG-OQL) and supports generalized path expressions (GPEs) featuring variables on both labels for nodes (i.e., classes) and edges (i.e., properties). RQL relies on a formal graph model (as opposed to other triple-based RDF QLs ) that captures the RDF modeling primitives and permits the interpretation of superimposed resource descriptions by means of one or more schemas.
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