[Coin-SMI] About SMI class hierarchy.

[Alan King]

Dear Fulvio

My humble apologies for the documentation.  Please continue to study SMI 
and C++!  Perhaps you can contribute some documentation as you go along... 
:-)

The hierarchy is very flat.  The SmiScnModel class encapsulates the 
relationship between an OsiSolverInterface and the 
SmiScenarioTree<SmiNode> class.  The SmiScenarioTree is just a tree with 
interfaces that allow one to add a "path to leaf" to the tree. 
SmiScenario<SmiNode> is a tree with data elements that are SmiNodes. 
SmiNodes implement the "core block-stoch block" pattern described in the 
SMPS standard.  An SmiScenarioTree<SmiNode> describes a stochastic program 
in the SMPS "scenarios" format.  The SmiScnModel class has methods that 
transform the SmiScenarioTree<SmiNode> structure into an OSI compatible 
linear program, and allow for "scenario-stage" semantics for querying data 
and solutions.

I am thinking of working with SmiScenarioTree a bit to make it a little 
easier to post and retrieve data to nodes.  Probably this will take the 
form of a virtual base class for the post/retrieve functionality.  Does 
anyone have objections to the fact that SmiScenarioTree is templated? 
Should I remove the templating and just use the post/retrieve classes to 
manage data?

So many questions, so little time.

Alan

coin-smi-bounces at list.coin-or.org wrote on 04/06/2005 03:45:18 AM:

> Hi
> 
> I am beginning to use SMI. Since I am new both to object oriented 
> programming and to stochastic programming I have a lot of questions 
about 
> SMI. Just start with one.
> 
> Looking at the automatic documentation, the class hierarchy is quite 
weak 
> and the SmiScnModel class does not appear at all. I guess that the 
> SmiScnModel class should stay on the top of a diagram under which I will 

> put SmiScnData and SmiDiscreteDistribution classes.
> Is this correct or am I wrong (and will study more SMI and C++)?
> 
> Thanks for your answers.
> 
> Before posting this message I give a look at the SMI mailing list 
archive. 
> I don't know why but I did not receive all the messages, so I read only 
> today about the proposal of implementing the first example in Birge and 
> Louveaux book. It is exactly what I am doing, so I can post the SMPS 
> files and the code to solve the model starting from them in my next 
email.
> 
>   Fulvio
> 
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> Coin-SMI at list.coin-or.org
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