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==[Untitled]==
What about YAP Prolog? http://www.ncc.up.pt/~vsc/Yap/documentation.html#SEC117 <small>—The preceding [[Wikipedia:Sign your posts on talk pages|unsigned]] comment was added by [[User:193.136.29.2|193.136.29.2]] ([[User talk:193.136.29.2|talk]] • [[Special:Contributions/193.136.29.2|contribs]]) 00:33, 15 April 2006 (UTC{{{3|}}})</small><!-- [Template:Unsigned2] -->
:Ok. At some point, this list of logic programming implementations should go to [[Constraint logic programming]]. - [[User:Paolo Liberatore|Liberatore]]([[User talk:Paolo Liberatore|T]]) 10:34, 15 April 2006 (UTC)
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Anything missing? - [[User:Paolo Liberatore|Liberatore]]([[User talk:Paolo Liberatore|T]]) 11:23, 9 March 2006 (UTC)
 
== Strings in Domains ==
Why are strings not added to the ___domain section?
When testing systems, it is often needed to solve string constraints.
For example, passwords must adhere to the constraints to ensure they are strong, and
input on a web form has to be in correspondence with a regular expression, e.g. of a ZIP code or IBAN account number.
A dedicate regex solver is Xeger https://code.google.com/p/xeger/
General purpose solvers are CVC4 http://cvc4.cs.nyu.edu/web/ and Z3str2 https://sites.google.com/site/z3strsolver/
 
== Domains? Solvers? ==
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This claim is wrong. Many constraint programming papers were published before, e.g., Ugo Montanari: Networks of constraints: Fundamental properties and applications to picture processing. Inf. Sci. 7: 95-132, '''1974'''. Furthermore, ALICE (J.-L. Laurière) was the first constraint programming language, in '''1976''' ! <span style="font-size: smaller;" class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/193.54.76.165|193.54.76.165]] ([[User talk:193.54.76.165|talk]]) 17:11, 1 February 2012 (UTC)</span><!-- Template:Unsigned IP --> <!--Autosigned by SineBot-->
 
== Constrained optimization ==
 
What the different between [[Constrained optimization]] and [[Constraint programming]]? For me, it is the same. [[User:Jumpow|Jumpow]] ([[User talk:Jumpow|talk]]) 23:15, 27 February 2017 (UTC)
 
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== Non-negativity constraints ==
 
A non-negativity constraint may be applied very simply to a parameter whose value is to be determined by means of a change of variable. For example, constraining the value of x to be positive may be achieved by determining the value of a parameter p which is numerically equal to x<sup>2</sup>. See, for example, Non-linear Optimization Techniques, by M.J. Box, D.Davies and W.H.Swan, published by Oliver & Boyd, Edinburgh, 1969, Chapter 5 "Constrained Optimization" for more examples. This is very useful when the parameter concerned is the value of a physical object which, by its nature, must be a positive number. [[User:Petergans|Petergans]] ([[User talk:Petergans|talk]]) 13:58, 25 January 2019 (UTC)
 
== Should this article include a list of constraint programming languages? ==
This article used to include a list of constraint programming languages (such as [[AIMMS]] and [[Constraint Handling Rules]]), but this list was deleted in [https://en.wikipedia.org/w/index.php?title=Constraint_programming&diff=944545642&oldid=937685444 this revision] by {{u|MrOllie}}.
Should a list of constraint languages be included in this article, or should it be included in another article (such as the main [[list of programming languages by type]])? [[User:Jarble|Jarble]] ([[User talk:Jarble|talk]]) 14:21, 27 September 2021 (UTC)