OMG has a number of standards related to Business Rules including the very complex, Semantics of Business Vocabulary and Rules (SBVR) and the Business Motivation Model (BMM). The one that will impact business rules vendors such as Innovations most directly is the Production Rule Representation. It stands at version 1.0 with version 1.1 coming out shortly. It can therefore be used for interchange of business rules amongst rule modeling tools (and other tools that support rule modeling as a function of some other task).
Paul Vincent is leading a committee that is developing a graphical notation for this standard. He discusses this in this recent post here .