Today we added Ecma Office Open XML final draft to the list of specifications covered by the OSP. Now users who implement solutions based on the Open XML format can choose to use either the language of the Covenant Not to Sue (CNS) or the language provided by the recently announced Open Specification Promise (OSP). The rights assigned both agreements are substantially the same, but since legal language can be very detailed, we wanted to be sure that users have both options. A number of industry legal experts have expressed their satisfaction with both approaches to the language so the result is that implementers should be comfortable leveraging these formats without fear of any future patent claim assertion by MS.