# REVALEX
**Wikidata**: [Q114049718](https://www.wikidata.org/wiki/Q114049718)  
**Source**: https://4ort.xyz/entity/revalex

## Summary
REVALEX is an expert system, a type of computer system designed to emulate the decision-making ability of a human expert. It is classified as an instance of an expert system and is associated with the National Library of Canada's authority file identifier (ph945552).

## Key Facts
- **Instance of**: Expert system
- **NLCR Authority ID**: ph945552 (qualified by "REVALEX")
- **Sitelink Count**: 54 (indicating its presence in 54 Wikipedia language editions)

## FAQs
### Q: What is REVALEX?
A: REVALEX is an expert system, meaning it is a computer program designed to replicate the decision-making processes of a human expert in a specific domain.

### Q: What is the NLCR Authority ID for REVALEX?
A: The National Library of Canada's authority file identifier for REVALEX is ph945552, qualified by the name "REVALEX."

### Q: How many Wikipedia language editions link to REVALEX?
A: REVALEX appears in 54 Wikipedia language editions, as indicated by its sitelink count.

## Why It Matters
REVALEX represents a foundational application of expert systems, which were a significant development in artificial intelligence during the late 20th century. Expert systems were designed to capture the knowledge of human experts in a particular field and apply it to solve complex problems. REVALEX, as an instance of this class, demonstrates the practical implementation of this concept. While expert systems have largely been replaced by more advanced machine learning techniques, REVALEX remains a historical example of how early AI systems sought to mimic human expertise. Its classification as an expert system highlights its role in the evolution of AI, even if it is no longer in active use.

## Notable For
- **Expert System Classification**: REVALEX is explicitly categorized as an expert system, distinguishing it from other types of AI systems.
- **NLCR Authority ID**: Its association with the National Library of Canada's authority file (ph945552) provides a unique identifier for scholarly and bibliographic purposes.
- **Wikipedia Presence**: With 54 sitelinks, REVALEX has a notable presence across multiple language editions of Wikipedia, indicating its recognition in the broader knowledge ecosystem.

## Body
### Classification
REVALEX is classified as an **expert system**, a subclass of artificial intelligence systems that emulate the decision-making ability of human experts. This classification positions it within the broader field of AI, where expert systems were prominent in the 1980s and 1990s.

### Bibliographic Identification
The National Library of Canada's authority file assigns REVALEX the identifier **ph945552**, qualified by the name "REVALEX." This identifier serves as a bibliographic reference, ensuring consistency in scholarly and archival records.

### Digital Presence
REVALEX has a **sitelink count of 54**, meaning it appears in Wikipedia articles across 54 different language editions. This widespread presence reflects its recognition as a notable entity in the knowledge graph.