Re: CIM association dilemma

I think you are looking at this as more complicated than it really is.

It is the client that decides which association class to use when creating 
instances, or to access later.
The cimserver has no decisions to make at all, because it is the client that 
does all that.
Whether the client uses the AB class or the A1B class it up to it.
Once the convention has been established, then it is up to the client to remain 
consistent.
However, I don't really see the need for the more specific A1B association 
class, once you have the more general one?
Sometimes it is good to have very specific association classes, if the class 
otherwise would have so many instances that a search would take too long.
But this is really a question of optimization, based on volume.

To make a real world example, lets assume A1 ... An are car parts, and B is/are 
different car models.
Then association AB would be the parts of a particular model, and there would be 
an instance for each part, per model.
But there is no reason why you could not also have an A1B association for engine 
to particular models.
It could be there may be a half dozen optional engines, and you might want to 
find that out without having to search all the thousands of possible parts.  The 
existence of A1B does not preclude the use of AB for engines, if you want to as 
well.
The most important thing is to implement the convention, as established by or in 
a profile.

It is best to remember the basis for CIM is a generic relational database, not 
something complex really.

 Kirk  Augustin
Portland, OR 





________________________________
From: kamal jeera <[email protected]>
To: [email protected]
Sent: Fri, July 9, 2010 5:41:56 PM
Subject: CIM association dilemma


Hi Folks,

I have this situation

class A1:CIM_ManagedElement
{
}

class A2:CIM_ManagedElement
{
}
....so on upto n classes

class An:CIM_ManagedElement
{
}

class B
{
}

[Association class]
class AB 
{
CIM_ManagedElement REF Antecedent;
B REF Dependent
}

[Association class]
class A1B
{
    A1 REF Antecedent;
    B REF Dependent
}

No AB association provider handles all A1,A2...An classes associations with 
class B

Now, just for A1 class, instead of AB association, I would like to handle by A1B 
association provider. 

 

I was wondering, how CIMSERVER will handle when cimclient request  A1 related 
data from B , given that it has one generalized association AB[where A1 is part 
of it] and one specific association A1B. 

which one CIMSERVER calls? does this dependent on the order in root/cimv2?

any help on this guys please.......it is bit critical  to me....