[Os-project-managers] A modest proposal

[R. Kipp Martin]

Hi Guys:

Here is one possible approach:

1) I do not favor an OSAmpl2OSxL. I prefer to keep separate classes. 
OSnl2osil and OSnl2osol. I am not bothered by reading an nl file twice.

2) Write an OSnl2osol class. This class would do the following:

a) have a method readOSoL that would read an existing OSoL file and 
create an OSOption object. If no such file exists, we simply new an OSoL 
file with nothing.

b) Read the nl file.

c) I think we initially support a predetermined set of suffixes. We get 
these suffixes using ASL. We first (order does not matter) get the 
suffixes we support associated with variables and write a method to put 
these in the existing OSoL file in the correct location. We can do this 
since we know the suffix. Then follow with rows and then the objective 
function.

Doing 2 above would greatly increase our AMPL functionality.

Cheers


-- 
Kipp Martin
Professor of Operations Research
and Computing Technology
Booth School of Business
University of Chicago
5807 South Woodlawn Avenue
Chicago, IL 60637
773-702-7456
kmartin at chicagobooth.edu
http://www.chicagobooth.edu/faculty/bio.aspx?person_id=12825325568
http://projects.coin-or.org/OS

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