# 5th-generation programming language

> solve problems using constraints given to the program, rather than using an algorithm

**Wikidata**: [Q3205914](https://www.wikidata.org/wiki/Q3205914)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Fifth-generation_programming_language)  
**Source**: https://4ort.xyz/entity/5th-generation-programming-language

## Summary
A 5th-generation programming language (5GL) is a type of programming language designed to solve problems by using constraints provided to the program rather than following a specific algorithm. It represents a subclass of programming languages that follows the 4th-generation programming language in the evolution of machine communication.

## Key Facts
- **Primary Function:** Solves problems using constraints instead of algorithms.
- **Classification:** Subclass of programming language.
- **Preceded by:** 4th-generation programming language (4GL).
- **Aliases:** 5GL, L5G, and fifth-generation programming language.
- **Related Systems:** OPS5, a rule-based or production system computer language.
- **Global Documentation:** Featured in 8 Wikipedia language editions, including English, French, Chinese, and Arabic.
- **Database Identifiers:** Freebase ID /m/033_bn and Microsoft Academic ID 199305712.
- **Academic Recognition:** Indexed in Encyclopædia Britannica Online under the topic "fifth-generation language."

## FAQs
### Q: What is the main difference between a 5GL and an algorithm-based language?
A: While traditional languages require a specific algorithm to solve a problem, a 5th-generation language solves problems by processing a set of constraints given to the program.

### Q: How does a 5th-generation language relate to a 4th-generation language?
A: A 5GL follows the 4th-generation language (4GL) in the hierarchy of programming. While 4GLs are non-procedural and focus on "what" instead of "how," 5GLs move further into constraint-based problem solving.

### Q: What is an example of a language related to the 5th generation?
A: OPS5 is a related entity, which is defined as a rule-based or production system computer language.

## Why It Matters
5th-generation programming languages represent a significant shift in the methodology of communicating instructions to machines. By moving away from the requirement of defining explicit algorithms, these languages allow for problem-solving based on logic and constraints. This evolution follows the development of 4th-generation languages, which prioritized user-friendliness and non-procedural "what vs. how" thinking. 

The significance of 5GLs is reflected in their inclusion in major academic and encyclopedic records, such as Encyclopædia Britannica. They play a specific role in the field of computer science by supporting rule-based or production systems, which differ from the procedural nature of earlier language generations.

## Notable For
- **Constraint-Based Logic:** Distinguished by the ability to solve problems through constraints rather than step-by-step algorithms.
- **Evolutionary Succession:** Positioned as the direct successor to 4th-generation programming languages.
- **Rule-Based Integration:** Closely associated with production system languages like OPS5.
- **Multilingual Technical Presence:** Recognized across diverse linguistic contexts with a sitelink count of 8 in global knowledge bases.

## Body

### Definition and Methodology
A 5th-generation programming language (5GL) is a programming language class defined by its approach to problem-solving. Unlike procedural languages that rely on a programmer to supply a specific algorithm, a 5GL uses constraints. The program is designed to reach a solution by adhering to these provided constraints.

### Historical and Technical Context
In the progression of programming languages, the 5GL follows the 4th-generation programming language (4GL). 4GLs are characterized as:
*   More user-friendly than previous generations.
*   Non-procedural in nature.
*   Focused on the "what" (the desired result) rather than the "how" (the specific steps).

### Related Systems and Languages
The 5th-generation language is linked to rule-based or production system computer languages. A primary example of a related thing in this category is OPS5. These systems typically operate on sets of rules rather than standard linear code.

### Identification and Records
The entity is formally recognized in several major data repositories:
*   **Encyclopædia Britannica:** Listed under the ID `topic/fifth-generation-language`.
*   **Freebase:** Identified by the value `/m/033_bn`.
*   **Microsoft Academic:** Formerly tracked under ID `199305712`.
*   **Wikipedia:** Maintained in 8 languages including Arabic (ar), English (en), Farsi (fa), French (fr), Polish (pl), Serbian (sr), Ukrainian (uk), and Chinese (zh).

## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)