# ECLiPSe

> constraint logic programming system

**Wikidata**: [Q5322693](https://www.wikidata.org/wiki/Q5322693)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ECLiPSe)  
**Source**: https://4ort.xyz/entity/eclipse-q5322693

## Summary
ECLiPSe is a constraint logic programming system and software environment designed for developing combinatorial optimization and scheduling applications. Originally developed in 1992, it functions as a dialect of the Prolog language, integrating logic programming with specialized constraint-solving capabilities.

## Key Facts
- **Inception:** 1992
- **Class:** Constraint logic programming language; software
- **Paradigm:** Constraint programming
- **Base Language:** Dialect of Prolog
- **Developer:** European Computer-Industry Research Center (development tenure ended 1995)
- **License:** Mozilla Public License
- **Website:** http://eclipseclp.org/
- **Source Repository:** https://git.code.sf.net/p/eclipse-clp/git (hosted on SourceForge)
- **Aliases:** ECLiPSe-CLP
- **Identifiers:** Golden ID Eclipse-BJEM; Wikidata description "constraint logic programming system"

## FAQs

**What is ECLiPSe used for?**
ECLiPSe is used to solve complex problems involving logical relationships and numerical constraints, such as combinatorial optimization, scheduling, planning, and resource allocation. It allows developers to specify problems declaratively while the system handles the constraint solving.

**Who developed ECLiPSe and when?**
The system was originally developed by the European Computer-Industry Research Center (ECRC), with its inception in 1992. The center's development tenure concluded in 1995.

**Is ECLiPSe open source?**
Yes, ECLiPSe is released under the Mozilla Public License. Its source code is publicly accessible via a Git repository hosted on SourceForge.

**How does ECLiPSe relate to Prolog?**
ECLiPSe is a dialect of the Prolog programming language. It extends traditional logic programming with constraint solving capabilities, classifying it as a constraint logic programming language.

## Why It Matters
ECLiPSe represents a significant advancement in the field of declarative programming by bridging the gap between logic specification and efficient algorithmic solving. It matters because it enables the solution of complex combinatorial problems—such as those found in logistics, manufacturing, and artificial intelligence—without requiring developers to write low-level search algorithms. By combining the symbolic reasoning of Prolog with powerful constraint satisfaction engines, ECLiPSe allows for more intuitive modeling of real-world constraints and faster development of decision support systems.

## Notable For
- Serving as a comprehensive platform that integrates logic programming with constraint solving libraries.
- Being a distinct dialect of Prolog tailored specifically for constraint logic programming (CLP).
- Facilitating the solution of difficult optimization and scheduling problems through declarative constraints.
- Providing an open-source framework under the Mozilla Public License, ensuring accessibility for research and commercial use.

## Body

### Historical Development
ECLiPSe was created in 1992, emerging during a pivotal era for constraint logic programming alongside languages like GNU Prolog (1996) and BNR Prolog (1988). The system was initially developed by the European Computer-Industry Research Center (ECRC), a hub for computer science research. The center's role as the primary developer concluded in 1995, after which the project continued to evolve within the open-source community. It is currently hosted on SourceForge and maintains a web presence at eclipseclp.org.

### Technical Characteristics
As a constraint logic programming language, ECLiPSe combines the declarative syntax of logic programming with specialized constraint solving mechanisms. It is technically classified as a dialect of Prolog, meaning it retains Prolog's core logic capabilities while extending them to handle constraints over finite domains, real numbers, and other specific data types.

The system allows programmers to define problems using logical rules and constraints rather than explicit control flow. The underlying constraint solver then automatically searches for solutions that satisfy all specified conditions. This approach is particularly effective for NP-hard problems where traditional imperative algorithms would be difficult to design and maintain.

### Paradigm and Classification
ECLiPSe operates within the **constraint programming** paradigm. It is formally recognized as:
- An instance of **software**.
- An instance of a **constraint logic programming language** (a subclass of both constraint and logic programming languages).
- A **dialect of computer language** Prolog.

### Implementation and Ecosystem
The ECLiPSe system is actively maintained as an open-source project. Key components of its technical ecosystem include:
- **Licensing:** It utilizes the Mozilla Public License, allowing for both open-source contributions and proprietary integration.
- **Code Repository:** The source code is managed in a Git repository located at `https://git.code.sf.net/p/eclipse-clp/git`.
- **Project Hosting:** The project is hosted on SourceForge under the project name "eclipse-clp".

### Applications
ECLiPSe is utilized across various domains that require sophisticated problem-solving capabilities. Its primary application areas include:
- **Scheduling Systems:** Managing complex timetabling and resource allocation.
- **Planning:** Developing sequences of actions to achieve specific goals in logistics and robotics.
- **Optimization:** Finding the best solution from a set of feasible options in areas like network design and supply chain management.
- **Artificial Intelligence:** Supporting expert systems and decision support applications through symbolic reasoning.

## References

1. [Source](https://golden.com/wiki/Eclipse-BJEM)