  In this paper we define a new presentation for the Dunkl-Opdam subalgebra of
the rational Cherednik algebra. This shows that the Dunkl-Opdam subalgebra is a
Drinfeld algebra. We use this fact to define Dirac cohomology for the DO
subalgebra. We also formalise generalised graded Hecke algebras and define a
Langlands classification to generalised graded Hecke algebras.
