The Journal of Logic Programming , 45 1 :1 -- 41, Schimpf, Joachim Schimpf. Logical loops. In PeterJ. Springer Berlin Heidelberg, Schrijvers et al.
Languages used for logic programming
Delimited continuations for prolog. TPLP , 13 , Sterling and E.
- Prolog (1).
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The Art of Prolog. Swift, Terrance Swift.
Incremental tabling in support of knowledge representation and reasoning. TPLP , 14 , Tarau, Paul Tarau. Coordination and concurrency in multi-engine prolog. Proceedings , volume of Lecture Notes in Computer Science , pages Springer, Triska, Markus Triska.
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Tag confusing pages with doc-needs-help Tags are associated to your profile if you are logged in. Levesque, H.
Thinking as Computation: A First Course. MIT Press, Is good too. Covington et al. Covington, Roberto Bagnara, Richard A.
Logic Programming - Otavio H. P. Valadares' Blog
Coding guidelines for Prolog. Satisfying Goals Pages Operators and Arithmetic Pages Input and Output Pages Loops Pages Preventing Backtracking Pages Changing the Prolog Database Pages List Processing Pages String Processing Pages More Advanced Features Pages Show next xx. The ability to hand the object constructor a filehandle is not currently supported, but would indeed be a nice improvement.
- What is logic?.
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- Logic Programming with Perl and Prolog?
While there are other ways to accomplish the task of reading in the data, such as calling the Prolog command consult , I will read in the Prolog file ancestry. Now that I have loaded my Prolog database, I need to feed it some more information. I need to take my data, in Dot format, and translate it into something that my Prolog interpreter will understand. There are some modules out there that may be helpful, such as DFA::Simple , but since I can assume that my data will look a certain way—having written it from my other application—I will build my own simple parser.
Logic Programming with Perl and Prolog
First, I am going to take a look at the data. Figure 1. A family tree from the sample data.
There are a few peculiarities worth mentioning here. First, it may seem that the all-lower-case names are a bit strange, but I am already preparing for the convention that data in Prolog is typically lower-case. Also, I inserted an extra space before the semicolons in an effort to make matching them easier. While both of these conventions are easy to code around, they seems to create extra questions when illustrating a point. Therefore, assume that the above Dot snippet illustrates the range of possible formats in the example.
Returning to the data, it will be easiest to parse the Dot data using a simple state machine. Previously, I had defined some constants to represent states:. Additionally, modifiers in this case only color begin with a left square-bracket and males have the blue modifier, whereas females are pink. Rather than simply pushing my new rules into the Prolog interpreter directly, I return an array that contains the full ruleset. I am doing this so that I can easily dump it to a file for troubleshooting purposes.
I can simply write the rules to a file, and consult this file in a Prolog shell.