🤖Prolog

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A logic programming language based on resolution and unification, used for AI, symbolic reasoning, and constraint solving.

DESCRIPTION

Prolog encodes knowledge as facts and rules, answering queries through SLD resolution and unification. It supports backtracking and constraint logic programming. Widely used in expert systems and natural language processing, Prolog has ISO standardization and popular implementations like SWI-Prolog and GNU Prolog. Its declarative style suits complex reasoning tasks. Modern applications include scheduling and theorem proving.

ALTERNATIVE DEFINITIONS

Wikipedia

Prolog is a logic programming language associated with artificial intelligence and computational linguistics.

Positions Prolog in AI and language processing, highlighting its heritage.

Source

SWI-Prolog

SWI-Prolog is a comprehensive Prolog environment.

Shows a modern, feature-rich implementation and platform ecosystem.

Source

ISO

ISO/IEC 13211-1 specifies the general core of the Prolog language.

Establishes formal standardization of Prolog’s core language features.

Source

RELATED TERMS

Rule-Based System Unification SLD Resolution Constraint Logic Programming Horn Clause Knowledge Representation Predicate SWI-Prolog GNU Prolog

COMPETING TERMS

Datalog Python

KNOWLEDGE AREAS

Programming Languages AI Mathematics

TARGET AUDIENCE

AI Engineer Data Scientist Software Developer

EXTERNAL SOURCES

• Wikipedia - Prolog
• SWI-Prolog - Official Prolog documentation
• GNU Prolog - GNU Prolog compiler overview
• ISO - Prolog ISO standard reference

TOP QUESTIONS

What is Prolog?

Prolog is a logic programming language that answers queries using rules, unification, and backtracking, widely used in AI and reasoning tasks.

Category: Definition

How does Prolog compare to Datalog?

Datalog is a subset optimized for databases; Prolog is more general, supporting complex terms and broader programming constructs.

Category: Comparison

What problems suit Prolog?

Constraint solving, expert systems, parsing, and combinatorial search benefit from Prolog’s declarative and backtracking capabilities.

Category: Example

Is Prolog standardized?

Yes, ISO/IEC 13211-1 defines Prolog’s general core, with implementations like SWI-Prolog adhering to common features.

Category: Standard

What are common mistakes in Prolog?

Improper recursion, missing base cases, and unintentional infinite backtracking often cause performance or correctness issues.

Category: Mistakes

How does Prolog perform inference?

It uses SLD resolution and unification to derive answers from facts and rules, exploring alternatives via backtracking.

Category: Concept

What libraries support modern Prolog development?

SWI-Prolog provides HTTP, constraint solvers, and foreign function interfaces, enabling integration with modern systems.

Category: Tools

Where to start learning Prolog?

Begin with basic facts, rules, and queries in SWI-Prolog, then study recursion, lists, and constraint logic programming examples.

Category: Learning

What risks arise when using Prolog in production?

Performance tuning and debugging can be challenging; ensure test coverage, profiling, and clear rule organization.

Category: Risk