There is no formal mapping from the ‘structured English’ grammar to the (not clearly well-founded) formal logic language defined in the SBVR specification, or to any other formal logic language, such as CLIF or OWL. There is a table of concept/term equivalences (developed primarily by Elisa Kendall, I think) for the basic SBVR concept system to CLIF and OWL (both of which are necessarily partial). Other controlled English language publications have formal mappings to some formal semantic model, which may or may not have a well-defined formal logic interpretation. (It is not clear to me that any purported ‘SBVR implementation’ actually has and uses such a mapping, except for simple subsets. Some, for example, map concept systems to UML class diagrams.) I had hoped that the academic research spawned by SBVR would have gone in this direction. Edward Barkmeyer