In general we use italicized names to refer to entities in the MPI language independent procedure definitions, and typewriter font for concrete Java entities.
As a rule Java argument names will be the same as the corresponding language independent names. In non-static methods of Comm, Status, Request, Datatype, Op or Group (and subclasses), the class instance generally stands for the argument called comm, status, request, datatype, op or group, respectively in the language independent procedure definition1. Names may be altered to bring them into line with Sun's Java code conventions, as discussed in section A.2.5. For example, underscores in variable names are typically removed in favour of capitalizing internal words.