joey@geaclib.UUCP (Joey De Wiele) (10/29/88)
Abstract Syntaxes and Protocol Specifications --------------------------------------------- In case anyone is perusing the X.500 document, looking for something new to figure out, I am stumped on this one: The macro defined in the Remote operations notation extension in CCITT X.219 for defining application contexts includes the notation for specifying abstract syntaxes for application protocols. My understanding of abstract syntaxes would lead me to believe that an abstract syntax would be defined in an ASN.1 module, or modules, and would be very similar to the abstract service definition. The X.500 application context is defined to use two abstract syntaxes, identified by the object identifiers id-as-acse and id-as-directoryAccessAS (for the DAP protocol). Now, I am unable to find an explicit statement linking the id-as-directoryAccess object identifier to a given ASN.1 module or set of definitions. Anyone have any ideas on this one? I'd like to know how this works. Joey