sol (format)

For other uses, see .sol.

Sol (format)
Filename extension	`.sol`
Developed by	Robert Fourer David Gay Brian Kernighan Bell Labs
Type of format	mathematical programming

sol is a file format for representing solutions of mathematical programming problems.^[1] It is often used in conjunction with the nl format to return solutions from the solvers. Initially this format has been invented for connecting solvers to AMPL^[2] but then it has been adopted by other systems such as FortSP for interacting with external solvers.

The sol format is low-level and is designed for compactness not for readability. It has both binary and textual representation. Many solvers such as CPLEX, Gurobi and MOSEK can produce files in this format either directly or through special driver programs.

The AMPL Solver Library (ASL) which allows among other things to read and write the sol files is open-source. It is used in many solvers to implement AMPL connection.

References

↑ David Gay (2005). Writing .nl Files (Technical report). Albuquerque, NM: Sandia National Laboratories. CiteSeerX 10.1.1.60.9659.
↑ David Gay (1993). Hooking Your Solver to AMPL (PDF) (Technical report). Murray Hill, NJ: Bell Laboratories. 97-4-06.

Mathematical optimization software

Data formats	LP MPS nl OptML OSiL sol xMPS

Modeling tools	AIMMS AMPL APMonitor CMPL CVX CVXOPT CVXPY ECLiPSe-CLP GAMS GNU MathProg JuMP LINDO OPL MPL OptimJ PICOS PuLP Pyomo ROML TOMLAB Xpress-Mosel YALMIP ZIMPL

LP, MILP^∗ solvers	ABACUS^∗ APOPT^∗ Artelys Knitro^∗ BCP^∗ BDMLP BPMPD BPOPT CLP CBC^∗ CPLEX^∗ CSDP DSDP FortMP^∗ GCG^∗ GIPALS32 GLPK/GLPSOL^∗ Gurobi^∗ HOPDM LINDO^∗ lp_solve^∗ LOQO MINOS MINTO^∗ MOSEK^∗ OOPS OOQP PCx QSopt SAS/OR^∗ SCIP^∗ SoPlex SOPT-IP^∗ Sulum Optimization Tools^∗ SYMPHONY^∗ XA^∗ Xpress-Optimizer^∗

QP, MIQP^∗ solvers	APOPT^∗ Artelys Knitro^∗ BPMPD BPOPT BQPD CBC^∗ CLP CPLEX^∗ FortMP^∗ GloMIQO^∗ Gurobi^∗ IPOPT LINDO^∗ LSSOL LOQO MINOS MOSEK^∗ OOPS OOQP QPOPT QPSOL SCIP^∗ XA Quadratic Solver Xpress-Optimizer^∗

QCP, MIQCP^∗ solvers	APOPT^∗ Artelys Knitro^∗ BPMPD BPOPT CPLEX^∗ GloMIQO^∗ Gurobi^∗ IPOPT LINDO^∗ LOQO MINOS MOSEK^∗ SCIP^∗ Xpress-Optimizer^∗ Xpress-SLP^∗

SOCP, MISOCP^∗ solvers	CPLEX^∗ DSDP Gurobi^∗ LINDO^∗ LOQO MOSEK^∗ SCIP^∗ SDPT3 SeDuMi Xpress-Optimizer^∗

SDP, MISDP^∗ solvers	CSDP DSDP MOSEK PENBMI PENSDP SCIP-SDP^∗ SDPA SDPT3 SeDuMi

NLP, MINLP^∗ solvers	ALGENCAN AlphaECP^∗ ANTIGONE^∗ AOA^∗ APOPT^∗ Artelys Knitro^∗ BARON^∗ Bonmin^∗ BPOPT CONOPT Couenne^∗ DICOPT^∗ FilMINT^∗ FilterSQP Galahad library ipfilter IPOPT LANCELOT LINDO^∗ LOQO LRAMBO MIDACO^∗ MILANO^∗ MINLP BB^∗ MINOS Minotaur^∗ MISQP^∗ NLPQLP NPSOL OQNLP^∗ PATHNLP PENNON SBB^∗ SCIP^∗ SNOPT^∗ SQPlab WORHP Xpress-SLP^∗

GO solvers	BARON Couenne^∗ LINDO SCIP

CP solvers	Artelys Kalis Choco Comet CPLEX CP Optimizer Gecode Google CP Solver JaCoP OscaR

Metaheuristic solvers	OptaPlanner LocalSolver

List of optimization software Comparison of optimization software

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sol (format)

See also

References