Methods and systems of transforming an AND/OR command tree into a command data model are described. An unsimplified command data model is generated from the AND/OR command tree by expressing the AND/OR command tree as a command tree using elements of EBNF (Extended Backus-Naur-Form) notation. Selected structures within the unsimplified command data model are simplified to create a simplified command data model. The simplified command data model is refined into a refined command data model by allowing renaming of selected elements of the command data model. The renaming is based on user-specified instructions.