nodeConstraint: datatype xsFacet* # nodeConstraintDatatype

def visitNodeConstraintDatatype(self, ctx: ShExDocParser.NodeConstraintDatatypeContext):
        """ nodeConstraint: datatype xsFacet* # nodeConstraintDatatype """
        self.nodeconstraint.datatype = self.context.iri_to_iriref(ctx.datatype().iri())
        self.visitChildren(ctx)