This directory contains an implementation of the MIOP specification for TAO. This currently includes: . The UIPMC (Unreliable IP multicast) Pluggable Protocol . The PortableGroup extensions to the POA . Request dispatch hooks to TAO to dispatch based on GroupID For examples on how to use MIOP, see $TAO_ROOT/orbsvcs/tests/Miop. Compilation Note: The PortableGroup library requires the CosNaming library due to references to it in the IDL from the MIOP specification. It is not really used in actual implementation. Implementation Notes: The current MIOP implementation is usable, but not complete according to the final MIOP specification. The following are current limitations: 1. Disassociating a group reference from a servant is not implemented. If interested in fixing this, be aware of the race conditions if a servant disassociates during an upcall. The TAO event services all have code to handle this issue. 2. Clients must call _unchecked_narrow to narrow any group references since a multicast group manager isn't supported yet (and UIPMC does not support twoway invocations) 3. TAO does not have a multicast group manager, so groups must be assigned by creating a MIOP CORBALOC formatted reference. See the tests or the MIOP specification for example group references. 4. TAO does not have a multicast gateway implementation, so using MIOP is currently limited to networks that natively support multicast