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In SQL, you say what you want - but you don't (directly) have to specify the algorithm used to derive it.Ī Prolog program is sometimes called a database, but it's really a set of predicate logic statements. The difference is a bit like using SQL for database queries rather than writing a program in, say, C.
VISUAL PROLOG LANGUAGE INSTALL
If you're interested in the topic, I'd recommend you install a Prolog interpreter and try to implement a very basic expert system to get a feel for it- it might help you understand why it's such a powerful tool for these tasks. Prolog's nature makes it very straightforward to implement rules and facts (in Prolog, everything is a rule or a fact), and then "query the database" (get an answer for your question), even when you have thousands of these rules and facts.
VISUAL PROLOG LANGUAGE SOFTWARE
I took an introduction to AI course in my undergrad that used Prolog to have us implement an expert system.Īn expert system is a piece of software that is used to solve a very specific problem whose solution is dependent on a high number of rules and variables.įor instance, you could imagine an expert system that tells you whether you should take an umbrella with you when you go out or not you would give it a set of data (whether it's cloudy, whether it rained the day before, what season it is, etc.) and the expert system would go through rules to give you an answer (if it is cloudy and it rained the day before, then you should take an umbrella).
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VISUAL PROLOG LANGUAGE CODE
Equivalent code in, say, the Lisps tends to be more verbose and more obfuscated in its intent because you spend a lot of time on the guts and the plumbing of managing and reasoning about relationships. When the same algorithms were implemented in Prolog, the result was a crystal-clear program easily fitting on one page.īasically it's a great language for expressing various relationships and goals in a succinct, (mostly-)readable and (semi-)natural way. There are well-known examples of symbolic computation whose implementation in other standard languages took tens of pages of indigestible code. Features like this make Prolog a powerful language for artificial intelligence (AI) and non-numerical programming in general. Prolog can now reason about the spatial relationships and their consistency with respect to the general rule. It is also easy to state a more general rule: if object X is closer to the observer than object Y, and Y is closer than Z, then X must be closer than Z. For example, it is an easy exercise in Prolog to express spatial relationships between objects, such as the blue sphere is behind the green one. Prolog is especially well suited for problems that involve objects - in particular, structured objects - and relations between them. This small set constitutes a surprisingly powerful and flexible programming framework. Prolog is a programming language centred around a small set of basic mechanisms, including pattern matching, tree-based data structuring and automatic backtracking. You can get Visual Prolog Commercial Edition here.From the preface to Prolog Programming for Artificial Intelligence: With the Commercial Edition you get multi-threading, additional GUI controls, ODBC support, sockets, HTTP and much more. The Personal Edition has limited library support compared to the Commercial Edition. There is library support for: file system, console, registry, environment variables and GUI programs. NOTE: The Personal Edition is for non-commercial usage only. Visual Prolog is a very safe and powerful programming language that combines the very best features of functional, logical and object-oriented programming paradigms in a elegant and consistent way. Visual Prolog supports advanced client-server and three-tier solutions and is especially well suited for dealing with complex knowledge.
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The goal of Visual Prolog is to support industrial strength programming of complex knowledge emphasized problems. Visual Prolog is a logical programming language that counts PDC Prolog and Turbo Prolog as predecessors.