...ed from nested classical codes. A mathematical framework for asymmetric quantum codes and some construction results were given in [27]. This framework was extended to additive codes by Ezerman et al. =-=[12, 13]-=-. ∗T. Aaron Gulliver is with the Department of Electrical and Computer Engineering, University of Victoria, PO Box 3055, STN CSC, Victoria, BC, Canada V8W 3P6. email: agullive@ece.uvic.ca. 1 In this p...