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The property <code>related</code> simply makes an association relationship between two concepts; no hierarchy or generality relation is implied. The properties <code>broader</code> and <code>narrower</code> are used to assert a direct hierarchical link between two concepts. The meaning may be unexpected; the relation <code><A> broader <B></code> means that A has a broader concept called B—hence that B is broader than A. Narrower follows in the same pattern.
While the casual reader might expect broader and narrower to be [[Transitive relation|transitive]] properties, SKOS does not declare them as such. Rather, the properties <code>broaderTransitive</code> and <code>narrowerTransitive</code> are defined as transitive super-properties of broader and narrower. These super-properties are (by convention) not used in declarative SKOS statements. Instead, when a broader or narrower relation is used in a triple, the corresponding transitive super-property also holds; and transitive relations can be inferred (and queried) using these super-properties.
=== Mapping ===
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