Open Software License 2.1
E618953
OSI-approved license
copyleft license
open source license
permissive-style copyleft license
software license
Open Software License 2.1 is an earlier version of the Open Software License, a copyleft-style open source software license designed to govern the use, modification, and distribution of software.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Open Software License 2.1 canonical | 1 |
| Open Software License family | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6790539 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Open Software License 2.1 Context triple: [Open Software License 3.0, hasPredecessor, Open Software License 2.1]
-
A.
Open Software License 3.0
Open Software License 3.0 is a copyleft open-source software license that permits free use, modification, and distribution of software while imposing conditions to protect authors’ rights and ensure source code availability.
-
B.
Apache License 1.1
Apache License 1.1 is an older, permissive open-source software license from the Apache Software Foundation that preceded and was later replaced by Apache License 2.0.
-
C.
Apache License 2.0
Apache License 2.0 is a permissive open-source software license from the Apache Software Foundation that allows broad use, modification, and distribution of licensed code with minimal restrictions.
-
D.
Apache License 1.0
Apache License 1.0 is the original version of the Apache Software Foundation’s permissive open-source software license that laid the groundwork for later Apache license revisions.
-
E.
Eclipse Public License
The Eclipse Public License is a widely used open-source software license that permits use, modification, and distribution of covered software while imposing certain copyleft-style obligations on derivative works.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Open Software License 2.1 Target entity description: Open Software License 2.1 is an earlier version of the Open Software License, a copyleft-style open source software license designed to govern the use, modification, and distribution of software.
-
A.
Open Software License 3.0
Open Software License 3.0 is a copyleft open-source software license that permits free use, modification, and distribution of software while imposing conditions to protect authors’ rights and ensure source code availability.
-
B.
Apache License 1.1
Apache License 1.1 is an older, permissive open-source software license from the Apache Software Foundation that preceded and was later replaced by Apache License 2.0.
-
C.
Apache License 2.0
Apache License 2.0 is a permissive open-source software license from the Apache Software Foundation that allows broad use, modification, and distribution of licensed code with minimal restrictions.
-
D.
Apache License 1.0
Apache License 1.0 is the original version of the Apache Software Foundation’s permissive open-source software license that laid the groundwork for later Apache license revisions.
-
E.
Eclipse Public License
The Eclipse Public License is a widely used open-source software license that permits use, modification, and distribution of covered software while imposing certain copyleft-style obligations on derivative works.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
OSI-approved license
ⓘ
copyleft license ⓘ open source license ⓘ permissive-style copyleft license ⓘ software license ⓘ |
| alsoKnownAs |
OSL version 2.1
ⓘ
linked to:
OSL 2.1
|
| appliesTo | software and associated documentation ⓘ |
| approvedBy | Open Source Initiative ⓘ |
| author | Lawrence Rosen ⓘ |
| compatibleWith |
GNU General Public License (GPL) (in one-way sense for derivative works)
ⓘ
linked to:
GNU General Public License
|
| conformsTo |
Open Source Definition
ⓘ
linked to:
Open Source Initiative
|
| contains |
limitation of liability clause
ⓘ
patent license grant ⓘ patent retaliation clause ⓘ warranty disclaimer ⓘ |
| copyrightHolder | Lawrence Rosen ⓘ |
| creator | Lawrence Rosen ⓘ |
| follows | Open Software License 2.0 ⓘ |
| governs |
distribution of software
ⓘ
modification of software ⓘ use of software ⓘ |
| grants |
right to copy the software
ⓘ
right to distribute the software ⓘ right to modify the software ⓘ right to sublicense under its terms ⓘ right to use the software ⓘ |
| hasClause | network use is not distribution (no network copyleft) ⓘ |
| hasCopyleft |
file-level copyleft
ⓘ
reciprocal licensing requirement ⓘ |
| hasJurisdiction | no specific jurisdiction (intended to be international) ⓘ |
| hasVersion | 2.1 ⓘ |
| isEarlierVersionOf | Open Software License 3.0 ⓘ |
| legalCodeLanguage | English ⓘ |
| licenseModel | copyright license ⓘ |
| licenseType | strong copyleft for original files ⓘ |
| partOf |
Open Software License family
ⓘ
linked to:
Open Software License 2.1
|
| precededBy | Open Software License 3.0 ⓘ |
| prohibits | removal of author attribution notices ⓘ |
| requires |
distribution of license text with copies
ⓘ
distribution of source code for modifications ⓘ identification of changes in modified files ⓘ preservation of attribution notices ⓘ preservation of copyright notices ⓘ preservation of license notices ⓘ |
| shortName | OSL 2.1 ⓘ |
| usedFor | free and open source software projects ⓘ |
| website | https://opensource.org/licenses/OSL-2.1 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Open Software License 2.1 Description of subject: Open Software License 2.1 is an earlier version of the Open Software License, a copyleft-style open source software license designed to govern the use, modification, and distribution of software.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Open Software License 2.1