Each benchmark that was initially named file has been normalized and renamed to normalized-opb-file. Comments in the original files were preserved as much as possible. Comments indicating the number of variables and constraints, as well as the initial file name and the variables renaming have been prepended.

These benchmarks come from different sources

- Submitted benchmarks

These are the instances which were directly submitted to the evaluation - Benchmarks obtained on the web

The comments in the normalized file (as well as the path to the file) should give you a good indication on where it comes from. - Benchmarks translated from MPS files gathered on the web

These benchmarks are a translation of linear programming problems available on the web and expressed in MPS format. These benchmarks are named normalized-mps-v*X*-*YY*-*ZZ*-*file*where*X*is the version of the translator,*YY*is the maximum number of bits used for the representation of the integer part of a variable,*ZZ*is the number of bits used for the representation of the fractional part of a variable and*file*is the name of the initial MPS file. Note that the translation process hasn't been thoroughly tested. Therefore, the semantics of these files might be different from the initial MPS file. Furthermore, the limitation on the number of bits used to represent a real variable imposes constraints which are not initially expressed in the MPS file. Therefore, the set of solutions is likely to be different. At last, the translation process tends to generate huge coefficients that can exceed the limits of a 32 bits integer.

Linear instances used in the PB06 evaluation are available here.