Type Alias MappingHead

MappingHead: Patch<
    Algebra.Pattern,
    {
        object: RDF.NamedNode
        | RDF.Variable
        | RDF.Literal
        | MappingHead;
        predicate: RDF.NamedNode | RDF.Variable;
        subject: RDF.NamedNode | RDF.Variable;
    },
>