WIMS> CIM> What CIM schema changes can be made in minor (non-breaking) updates?

WIMS> CIM> What CIM schema changes can be made in minor (non-breaking) updates?

WIMS> CIM> What CIM schema changes can be made in minor (non-breaking) updates?

Harry Lewis harryl at us.ibm.com
Mon May 22 13:38:56 EDT 2006


I fully agree with Rick.
---------------------------------------------- 
Harry Lewis 
IBM STSM
Chairman - IEEE-ISTO Printer Working Group
http://www.pwg.org
IBM Printing Systems 
http://www.ibm.com/printers
303-924-5337
---------------------------------------------- 



<Richard_Landau at Dell.com> 
Sent by: owner-wims at pwg.org
05/22/2006 10:01 AM

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Subject
WIMS> CIM> What CIM schema changes can be made in minor (non-breaking) 
updates?






In a CIM Core discussion about some proposed changes, I found the 
following blurb: 
   "Remember that a minor schema change may: 
      - Add properties 
      - Introduce new classes between existing classes 
      - Move existing properties up from an existing class" 
A "minor schema change" in this context is one that alters the minor 
version number but not the major version number.  The CIM Schema version 
number is structured as  major.minor.patch,  so that, for instance, moving 
from 2.12 to 2.13 is a minor change.  Minor changes must not break 
existing code, but otherwise may include the types of changes mentioned. 
The changes we (PWG) are proposing are all minor.  *Extremely* minor in 
phase 1, very minor in phase 2, and still minor in phase 3 even if we 
perform some surgery on the class structure.  Let's not worry too much 
about this until someone says, "No."  Remember Grace Hopper's Law: It is 
easier to beg forgiveness than to get permission. 
rick 
---------------------- 
Richard_Landau(at)dell(dot)com, Stds & System Mgt Arch, CTO Office 
+1-512-728-9023, One Dell Way, RR5-3 MS 8509, Round Rock, TX 78682 
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