# ConceptBase

> free software

**Wikidata**: [Q1123786](https://www.wikidata.org/wiki/Q1123786)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ConceptBase)  
**Source**: https://4ort.xyz/entity/conceptbase

## Summary
ConceptBase is a deductive and object-oriented database management system developed at RWTH Aachen University (University of Aachen) and the University of Skövde. It is free software distributed under the 2-clause BSD License.

## Key Facts
- **Instance of**: Free software, database management system
- **License**: 2-clause BSD License
- **Developer**: RWTH Aachen University (also developed at University of Skövde)
- **Country**: Australia
- **Website**: http://conceptbase.cc/
- **Aliases**: Conceptbase
- **Copyright status**: Copyrighted
- **Wikipedia title**: ConceptBase
- **Wikipedia languages**: German (de), English (en), Indonesian (id)
- **Sitelink count**: 3
- **GND ID**: 4203319-6
- **Freebase ID**: /m/04mm9g
- **Microsoft Academic ID** (discontinued): 2779973573

## FAQs
### Q: What type of software is ConceptBase?
A: ConceptBase is a deductive and object-oriented database management system. It is classified as both free software and a database management system.

### Q: Under what license is ConceptBase distributed?
A: ConceptBase is distributed under the 2-clause BSD License, a permissive free software license.

### Q: Who developed ConceptBase?
A: ConceptBase was developed at RWTH Aachen University (University of Aachen) and the University of Skövde.

### Q: Is ConceptBase free to use?
A: Yes, ConceptBase is free software, though it maintains a copyrighted status.

## Why It Matters
ConceptBase matters as an academic-developed database management system that combines deductive and object-oriented paradigms. It represents a research-oriented approach to database technology developed through collaboration between German and Swedish universities. As free software released under the 2-clause BSD License, it provides users the freedom to run, study, change, and distribute the software, aligning with the principles of the free software movement. Its availability in multiple languages (German, English, Indonesian) indicates international accessibility and relevance.

## Notable For
- Combines **deductive** and **object-oriented** database paradigms in one system
- **Academic origins**: Developed collaboratively at RWTH Aachen University and University of Skövde
- Released as **free software** under the permissive 2-clause BSD License
- Available in **three Wikipedia languages**: German, English, and Indonesian
- Integrates logical inference capabilities with object-oriented data modeling

## Body

### Definition and Classification
ConceptBase is a deductive and object-oriented database management system. It is classified as an instance of **free software** and **database management system**. The system has an alternative spelling listed as "Conceptbase" (lowercase 'b'). Its bibliographic identifier is GND ID 4203319-6, and it was previously indexed in Freebase under ID /m/04mm9g.

### Development and Origin
ConceptBase was developed through a collaboration between two universities:
- **RWTH Aachen University** (University of Aachen) — listed as the developer entity
- **University of Skövde** — noted as a co-development institution in the project description

The project is associated with **Australia** in its structured country property. The official website is hosted at http://conceptbase.cc/.

### Licensing and Distribution
ConceptBase is distributed under the **2-clause BSD License**, a permissive free software license. The license reference is documented at https://conceptbase.sourceforge.net/CB-FreeBSD-License.txt. The software is classified as **copyrighted** while being distributed as free software. This classification as free software means ConceptBase grants users the freedoms to run, study, change, and distribute the software and its modified versions.

### Online Presence and Documentation
ConceptBase has a Wikipedia article under the title "ConceptBase" with sitelink count of 3. The article is available in three languages:
- **German (de)**
- **English (en)**
- **Indonesian (id)**

The system was previously indexed in Microsoft Academic under ID 2779973573 (service discontinued). The Wikidata description for ConceptBase is "free software."

### Relationship to Free Software Category
ConceptBase is an instance of the free software category, meaning it is software distributed under terms that allow users to freely run, study, change, and distribute it and modified versions. This positions ConceptBase within the broader free software movement and relates it to open-source software and FOSS (free and open-source software) concepts. The software provides an alternative model to proprietary software by emphasizing redistribution and modification rights.

## References

1. [Source](https://conceptbase.sourceforge.net/CB-FreeBSD-License.txt)