AMPL - Programming language

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AMPL, aka A Mathematical Programming Language, is an open source programming language created in 1985 by Robert Fourer and David Gay and Brian Kernighan.

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A Mathematical Programming Language (AMPL) is an algebraic modeling language to describe and solve high-complexity problems for large-scale mathematical computing (i.e., large-scale optimization and scheduling-type problems). It was developed by Robert Fourer, David Gay, and Brian Kernighan at Bell Laboratories. AMPL supports dozens of solvers, both open source and commercial software, including CBC, CPLEX, FortMP, Gurobi, MINOS, IPOPT, SNOPT, KNITRO, and LGO. Read more on Wikipedia...

Tags: programming language
There are at least 5,570 AMPL repos on GitHub
Early development of AMPL happened in AMPL Optimization LLC
The Google BigQuery Public Dataset GitHub snapshot shows 806 users using AMPL in 852 repos on GitHub
Explore AMPL snippets on Rosetta Code
AMPL on HOPL
Pygments supports syntax highlighting for AMPL
GitHub supports syntax highlighting for AMPL
Events page for AMPL
Indeed.com has 3 matches for "ampl developer".
ampl.com was registered in 1995
See also: (8 related languages) Linux, Unix, awk, C, Algebraic modeling language, NL, XML, Microsoft Excel
3 PLDB concepts link to AMPL: mpl, MPS Format, rason

Example from the web:

set PROD;  # products

param rate {PROD} > 0;     # tons produced per hour
param avail >= 0;          # hours available in week

param profit {PROD};       # profit per ton
param market {PROD} >= 0;  # limit on tons sold in week

var Make {p in PROD} >= 0, <= market[p]; # tons produced

maximize Total_Profit: sum {p in PROD} profit[p] * Make[p];

               # Objective: total profits from all products

subject to Time: sum {p in PROD} (1/rate[p]) * Make[p] <= avail;

               # Constraint: total of hours used by all
               # products may not exceed hours available

Example from Linguist:

# A toy knapsack problem from the LocalSolver docs written in AMPL.

set I;
param Value{I};
param Weight{I};
param KnapsackBound;
var Take{I} binary;

maximize TotalValue: sum{i in I} Take[i] * Value[i];
s.t. WeightLimit: sum{i in I} Take[i] * Weight[i] <= KnapsackBound;

data;

param:
I: Weight Value :=
0    10     1
1    60    10
2    30    15
3    40    40
4    30    60
5    20    90
6    20   100
7     2    15;

param KnapsackBound := 102;

Example from Wikipedia:

set Plants;
 set Markets;

 # Capacity of plant p in cases
 param Capacity{p in Plants};

 # Demand at market m in cases
 param Demand{m in Markets};

 # Distance in thousands of miles
 param Distance{Plants, Markets};

 # Freight in dollars per case per thousand miles
 param Freight;

 # Transport cost in thousands of dollars per case
 param TransportCost{p in Plants, m in Markets} :=
     Freight * Distance[p, m] / 1000;

 # Shipment quantities in cases
 var shipment{Plants, Markets} >= 0;

 # Total transportation costs in thousands of dollars
 minimize cost:
     sum{p in Plants, m in Markets} TransportCost[p, m] * shipment[p, m];

 # Observe supply limit at plant p
 s.t. supply{p in Plants}: sum{m in Markets} shipment[p, m] <= Capacity[p];

 # Satisfy demand at market m
 s.t. demand{m in Markets}: sum{p in Plants} shipment[p, m] >= Demand[m];

 data;

 set Plants := seattle san-diego;
 set Markets := new-york chicago topeka;

 param Capacity :=
     seattle   350
     san-diego 600;

 param Demand :=
     new-york 325
     chicago  300
     topeka   275;

 param Distance : new-york chicago topeka :=
     seattle        2.5      1.7     1.8
     san-diego      2.5      1.8     1.4;

 param Freight := 90;

Language features

Feature	Supported	Example	Token
MultiLine Comments	✓
Integers	✓	# \d+([eE][+-]?\d+)?
Floats	✓	# (\d+\.(?!\.)\d*\|\.(?!.)\d+)([eE][+-]?\d+)?
Assignment	✓		:=
Comments	✓	# A comment
Line Comments	✓	# A comment	#
Semantic Indentation	X