As pointed out in a [comment on](https://github.com/w3c/sparql-query/pull/306/files#r2556504871) PR #306, the naming of the [algebraic property path expressions](https://www.w3.org/TR/sparql12-query/#defn_AlgebraicPropertyPathExpression) is inconsistent with respect to upper case and lower case. This should be made consistent.