sparql-view-unfold
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    Type Alias RawBasicTerm

    RawBasicTerm: Exclude<RawTerm, RDF.BaseQuad>

    A raw term that is not a triple term, which is what a pin holds.

    Not the solver refusing triple terms: one is not a value the way an IRI is but a shape, which ClusterSolver.assertTerm decomposes a group into, so it lives one level up on TermClusterSet's lattice rather than in the leaves of it.