1. ITU languages for ODP - a personal view - I may be wrong!
Rick Reed
TSE Limited

2. ITU-T languages 2003 URN (GRL,UCM) - draft MSC ASN.1 (XML) SDL TTCN
eODL

3. What is Open Distributed Processing?
A name for systems that have
Open service interfaces on objects
Distribution of objects, data and management
X.90x.. is a Framework Reference Model
An ODP system can (but need not be) assessed against RM-ODP
Conformance to RM-ODP does not ensure openness

4. Viewpoints
Enterprise, Information, Computation, Engineering, Technology
RM-ODP set not unique or definitive
Viewpoint needs a language
Overlaps require consistency
Traceable concepts & semantics
Development through viewpoints
Are viewpoints part of ODP?
If yes, must they be the RM-ODP ones?

5. Transparency Hiding distribution from the “user”
Access - differences in interface
Failure - difference in mode
(re)Location/Migration
Replication - number of server objects
Transaction - co-ordination of activities
Should conform to RM-ODP if used
Language support for Transparency?

6. ITU-T languages for ODP
Are they suitable?
Are they used?
If not, why not? What is?
Do they match RM-ODP viewpoints?
Attributes:
Remote, Concurrent, Diverse Environments, Mobile, Multiple Copies, Asynchronous, Indirect, Separate, Relative, Partial Failure, Late Dynamic Binding ...

7. Methodology
RM-ODP has been used as a general framework for tool supported design methodology. It provides object-oriented concepts and principles for structuring the system design. The design process is not a pure top-down approach, but is an iterative usage of each of the stages from an abstract level down to the detailed specification and implementation. Repetition of steps is needed if errors are detected either by validation on the design plane or by testing the implementation.