System Object Model
System Object Model (SOM) is an object-oriented shared library system. DSOM, a distributed version based on CORBA, allowed objects on different computers to communicate.
Products
- IBM System Object Model/6000 (SOM/6000)
- IBM SOMobjects Developer Toolkit Version 2.1 for OS/2, AIX and Windows (10H9767)
- IBM SOMobjects Workgroup Enabler Version 2.1 for OS/2, AIX and Windows (10H9769)
- IBM SOMobjects for OS/400
Documentation
Runtime
| Component | |
|---|---|
| SOM Run-time Kernel | SRK |
| SOM Event Management Framework | SEM |
| Distributed SOM Framework | SDS |
| SOMobjects Interface Repository Framework | SIR |
| SOMobjects Utility Classes | SUT |
- Syslevel
- Version 2.01.5 - SM20012
Files
System Object Model runtime included with OS/2 Warp Version 4 consists of the following files:
| Name | Comments |
|---|---|
| SOM.DLL | SOM Run-time Library |
| SOM.IR | SOM Implementation Repository. Types, classes, and methods provided by the SOMobjects Framework |
| SOMD.DLL | Distributed SOM (DSOM) |
| SOMD.MSG | Messages for SOMD.DLL |
| SOMDCLS.DAT | Distributed SOM class database |
| SOMDCLS.TOC | Distributed SOM class index |
| SOMDD.EXE | DSOM daemon. It must be started prior to running a DSOM application |
| SOMDIMPL.DAT | Distributed SOM implementation database |
| SOMDIMPL.TOC | Distributed SOM implementation index |
| SOMDSVR.EXE | Generic DSOM server program |
| SOMEM.DLL | SOM Event Manager |
| SOMIR.DLL | CORBA Interface Repository support |
| SOMK.MSG | SOM error messages file |
| SOMS.DLL | SOM Sockets - soms library |
| SOMSEC.DLL | SOM Security library |
| SOMTC.DLL | CORBA TypeCode support |
| SOMU.DLL | Metaclass framework |
| SOMUC.DLL | Collection Class Library |
Articles
Replacement
- somFree is a Portable implementation of SOM, but it hasn't been ported to OS/2-eCS. It is open source under the LGPL v3.
- NOM (Netlabs Object Model) was an implementation of SOM that was going to be part of Voyager, but it never got finished.
Publications
- System Object Model Programing Guide PDF
- G221-3651-02: SOMobjects Specification Sheet - IBM 1995-04
- Books
- Jennifer Hamilton: Programming with DirectToSOM C++ - Wiley 1996, ISBN 0471-16004-0
- Robert Orfali, Dan Harkey, Jeri Edwards: The Essential Distributed Objects Survival Guide - Wiley 1996, ISBN 0-471-12993-3
- Articles
- Brian Curran: Why SOM? - IBM Personal Systems Magazine (Mar/Apr 1996)