Project Summary
OPUS is a repository software originally developed at University library Stuttgart and Bibliotheksservice-Zentrum Baden-Württemberg (BSZ). Coorporative Library Network Berlin Brandenburg (KOBV) released its recent version OPUS 4 in November 2010 and will develop it further. OPUS is one of the most frequently utilized repository management systems in German libraries.
In a Nutshell, OPUS...
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has a well established, mature codebase
maintained by a small development team
with stable Y-O-Y commits -
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took an estimated 68 years of effort (COCOMO model)
starting with its first commit in August, 2008
ending with its most recent commit 28 days ago
GNU General Public License v3.0 only
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryJul 24 2026 — Aug 23 2026
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12 Month SummaryAug 23 2025 — Aug 23 2026
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