LaTeX Project Public License, Version 1.1

Also known as LPPL 1.1, LPPL-1.1, LaTeX Project Public License 1.1, LaTeX Project Public License v1.1.

Commercial use: allowed
Share alike: not required
Attribution: required (keep the copyright and license notices)

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Write this as a license text (needs an account) DALICC reads the model above and writes what it permits, requires and prohibits in plain English. Without an account, the Text download above writes the model out from the vocabulary.

Canonical URI https://dalicc.net/licenselibrary/LPPL-1.1

Permissions

Add statement from the text
Change license by library convention
Duties
- Use a compliant license by library convention
Charge distribution fee from the text
Commercial use from the text
Derivative works from the text
Derive from the text
Duties
- Attribution from the text
- Modification notice from the text
- Original version offer from the text
- Rename from the text
Display from the text
Distribute from the text
Duties
- Notice from the text
Grant use from the text
Modified works from the text
Modify from the text
Duties
- Attribution from the text
- Modification notice from the text
- Original version offer from the text
- Rename from the text
No-warranty notice from the text
Present from the text
Reproduce from the text

Prohibitions

Add limitation from the text

License-wide duties

This license states no duties that apply to the work as a whole.

What applies by default

The statements above are the library's reading of this license: each is marked with the sentence it rests on, or as a library convention where the text is not explicit. The statements below are the ones the DALICC reasoner supplies for acts the license says nothing about, from the default rules of the dependency graph it reasons with. Each one names the legal source it rests on. None of it is in the record.

Promote by default rule (adopted)

This license says nothing about Promote, and the graph applies this reading in all jurisdictions it covers: it is not permitted unless the license permits it.

A licence that says nothing about endorsement is read as not allowing it: the licence gives the licensee no right to use the licensor's name or marks in a way that states or implies that the licensor endorses the licensee or its product, while stating truthfully that a work is based on or uses the licensed work is a different act that this rule does not decide. A copyright licence grants rights in the work, and the right to use a name or a trademark is a separate right under trademark law and the protection of names, which a silent copyright licence does not pass on. Combining a licence that is silent about endorsement with one that permits it shows a conflict marked as coming from this rule.

Basis Trademark and name rights are separate from copyright: Regulation (EU) 2017/1001 article 9 lets the proprietor of an EU trade mark prevent all third parties not having his consent from using the sign in the course of trade, and Directive (EU) 2015/2436 article 10, 15 U.S.C. 1114 and 1125(a), section 12 BGB and section 43 ABGB protect marks and names in the same way. The library's evidence is Creative Commons 4.0 section 2(b)(2): Patent and trademark rights are not licensed under this Public License. A copyright licence that is silent grants no right to use the licensor's name or marks to suggest endorsement (Worldwide)

Clauses

Warranty disclaimer

There is no warranty for The Program. Except when otherwise stated in writing, The Copyright Holder provides The Program `as is', without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of The Program is with you. Should The Program prove defective, you assume the cost of all necessary servicing, repair, or correction.

Limitation of liability

In no event unless agreed to in writing will The Copyright Holder, or any author named in the files of The Program, or any other party who may distribute and/or modify The Program as permitted below, be liable to you for damages, including any general, special, incidental or consequential damages arising out of any use of The Program or out of inability to use The Program (including, but not limited to, loss of data, data being rendered inaccurate, or losses sustained by anyone as a result of any failure of The Program to operate with any other programs), even if The Copyright Holder or said author or said other party has been advised of the possibility of such damages.

Additional clauses

This license gives conditions under which The Program may be distributed and conditions under which modified versions of The Program may be distributed. Individual files of The Program may bear supplementary and/or superseding conditions on modification of themselves and on the distribution of modified versions of themselves, but *no* file of The Program may bear supplementary or superseding conditions on the distribution of an unmodified copy of the file. A distributor wishing to distribute a complete, unmodified copy of The Program therefore needs to check the conditions only in this license and nowhere else. Activities other than distribution and/or modification of The Program are not covered by this license; they are outside its scope. In particular, the act of running The Program is not restricted.

Info

Target asset types: Creative work (i.e. text, picture, sound, movie), Software
Region / jurisdiction: Worldwide
Validity: Perpetual
Source: https://spdx.org/licenses/LPPL-1.1.html
Legal code: https://www.latex-project.org/lppl/lppl-1-1.txt
This description is published under: Creative Commons Attribution 4.0 International
Publisher: LaTeX3 Project
Attribution name: LaTeX3 Project
SPDX identifier: LPPL-1.1 on the SPDX license list
Version: 1.1
DALICC identifier: LPPL-1.1

This record is published under CC BY 4.0. Credit it as: DALICC License Library, DALICC - Verein zur Förderung der Rechtssicherheit in der Datenbewirtschaftung, https://dalicc.net, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). The license it describes belongs to its publisher.

Use this license

Everything below is generated from this record. Replace the example address with the address of your own work.

JSON sidecar

{
  "license-uri": "https://dalicc.net/licenselibrary/LPPL-1.1",
  "license-title": "LaTeX Project Public License, Version 1.1",
  "spdx-id": "LPPL-1.1",
  "attribution": "Copyright (c) [year] [copyright holder]",
  "asset": null,
  "generated-by": "DALICC"
}

RDF, Turtle

@prefix cc: <http://creativecommons.org/ns#> .

<https://example.org/my-work>
    cc:license <https://dalicc.net/licenselibrary/LPPL-1.1> .

RDF, JSON-LD

{
  "@context": {
    "cc": "http://creativecommons.org/ns#"
  },
  "@id": "https://example.org/my-work",
  "cc:license": {
    "@id": "https://dalicc.net/licenselibrary/LPPL-1.1"
  }
}

HTML attribution

<p>This work is licensed under <a href="https://dalicc.net/licenselibrary/LPPL-1.1" rel="license">LaTeX Project Public License, Version 1.1</a>.</p>

This license asks for attribution, so the credit line is part of it.

Badge

Markdown

[![License: LaTeX Project Public License, Version 1.1](https://dalicc.net/license-library/LPPL-1.1/badge.svg)](https://dalicc.net/license-library/LPPL-1.1)

HTML

<a href="https://dalicc.net/license-library/LPPL-1.1"><img src="https://dalicc.net/license-library/LPPL-1.1/badge.svg" alt="License: LaTeX Project Public License, Version 1.1"></a>

Review

Written from the license text by: Giray Havur
Written on: 2026-09-22
Second review: not yet done
Record changed since this review: yes (version 2, 2026-09-24)
Findings: 16 recorded, 13 applied to the record, 0 proposed

The record models version 1.1 of the LaTeX Project Public License, which lets anyone distribute a complete unmodified copy of The Program and distribute a modified file if eight conditions are met. Those conditions are the duties on odrl:modify and odrl:derive: rename the file, credit the original, mark the change, and keep the unmodified Program obtainable. Condition 7 lets a modified file go under another licence that keeps the file-name rule, which is dalicc:ChangeLicense with a dalicc:compliantLicense duty.

16 findings

info Rubric 1 spdx:licenseId applied

File name, identifier, SPDX identifier and IRI agree. The library held only LatexProjectPublicLicenseVersion13c, whose descriptive identifier predates the SPDX mapping; this record uses the SPDX identifier, carries dalicc:variantKind "version" and dalicc:licenseVersion "1.1", and points cc:legalcode at the text on the LaTeX project's own site because the Open Source Initiative lists only 1.3c.
info Rubric 2 odrl:target applied

One odrl:AssetCollection of dct:type dalicc:CreativeWork and dcmitype:Software. The licence governs the files of a TeX or LaTeX distribution, which are program files and documentation in the same tree, and the record says both. LatexProjectPublicLicenseVersion13c carries dcmitype:Software alone; adding dalicc:CreativeWork there is proposed.
major Rubric 3 odrl:permission applied

The grant reads: "You may distribute a complete, unmodified copy of The Program. Distribution of only part of The Program is not allowed." and "You may distribute a modified file of The Program if, and only if, the following eight conditions are met". That is odrl:reproduce, odrl:distribute, odrl:display, odrl:present, odrl:modify, odrl:derive, cc:DerivativeWorks and dalicc:ModifiedWorks. Nothing in the text limits the field of use or the price, and the preamble says "the act of running The Program is not restricted", so cc:CommercialUse and dalicc:chargeDistributionFee stand as they do on the 1.3c record.
major Rubric 3 odrl:permission applied

Condition 7 reads: "You must distribute the modified file under a license that forbids distribution both of the modified file and of any files derived from the modified file with the filename of the original file." A modified file may therefore travel under another licence, provided that licence keeps the file-name rule. That is dalicc:ChangeLicense with a dalicc:compliantLicense duty, reciprocity shape 3, and it is the shape the 1.3c record carries for clause 10(a).
major Rubric 5 odrl:duty applied

The eight conditions on a modified file are the duties on odrl:modify and odrl:derive. Condition 3: "You must not distribute the modified file with the filename of the original file." is dalicc:rename. Condition 4: "In the modified file, you must acknowledge the authorship and name of the original file, and the name (if any) of the program which contains it." is cc:Attribution. Condition 5: "You must change any identification string in the file to indicate clearly that the modified file is not part of The Program." is dalicc:modificationNotice. Condition 8(A): "distribute a copy of The Program (that is, a complete, unmodified copy of The Program) together with the modified file", or information sufficient to obtain a copy, is dalicc:originalVersionOffer, a term defined by the review of 2026-09-15 and applied to no record until now. cc:Notice hangs on odrl:distribute, because the conditions of the licence are borne by the files themselves.
minor Rubric 5 odrl:duty applied

cc:SourceCode is not written. Version 1.1 has no Compiled Work: it speaks only of files of The Program, and every file it governs is source. Version 1.3a introduced the Compiled Work and with it clause 7, which is why the 1.3a record carries cc:SourceCode and this one does not.
major Rubric 4 odrl:prohibition applied

dalicc:addLimitation is prohibited. The preamble reads: "Individual files of The Program may bear supplementary and/or superseding conditions on modification of themselves and on the distribution of modified versions of themselves, but *no* file of The Program may bear supplementary or superseding conditions on the distribution of an unmodified copy of the file." A licensee may not make the distribution of an unmodified copy harder than the licence makes it.
minor Rubric 4 odrl:prohibition applied

dalicc:promote is prohibited, as it is on LatexProjectPublicLicenseVersion13c and on 419 of the 460 records the library held. Version 1.1 has no trademark clause: the nearest sentences are condition 5, "You must change any identification string in the file to indicate clearly that the modified file is not part of The Program.", and condition 6, which asks you to redirect error reports away from the original maintainers. The review record of the 1.3c version proposes dropping the prohibition from that record; the same question is open here and the prohibition is kept so that the three LaTeX records answer it the same way.
major Rubric 4 odrl:prohibition applied

cc:ShareAlike is not prohibited. LatexProjectPublicLicenseVersion13c carries odrl:prohibition cc:ShareAlike, one of only three records in the library that do, and its own review record proposes removing it. Neither the 1.1 text nor the 1.3a text states a share-alike condition or forbids one, so the statement is not repeated here. Family rule 5 is not affected, because neither record is in the permissive set.
minor Rubric 6 dalicc:WarrantyDisclaimer applied

The NO WARRANTY section holds two paragraphs and they go into two properties, which is family rule 10: the first into dalicc:WarrantyDisclaimer and the second, which begins "In no event unless agreed to in writing will The Copyright Holder", into dalicc:LiabilityLimitation. The backtick-apostrophe quoting of the source (`as is') is kept as the text writes it. The text carries no long dash.
info Rubric 6 dalicc:additionalClauses applied

Five clauses are quoted whole: the scope paragraph, the eight conditions on a modified file, the definitions of distribution and modification, the rule on individual files, and the additional conditions on LaTeX software files, which include "You may not modify any file with filename extension `.ins' since these are installation files containing the legal notices that are placed in the files they generate." The file-extension rules for .ins, .fd and .cfg files have no term of their own and are quoted rather than modelled.
info Rubric 7 cc:jurisdiction applied

The text names no legal system, so cc:jurisdiction is dalicc:worldwide, and it sets no term, so dalicc:validityType is dalicc:perpetual. There is no termination clause, so dalicc:terminatesOnBreach is not written. The example notice in the "How to Use This License" section offers "either version 1.1 of this license or (at your option) any later version", but that is a sentence an author puts in a file rather than a clause of the licence, so dalicc:orLaterVersionOption is not written; the 1.3c record does not carry it either.
gap Rubric 8 dalicc:additionalClauses none

Two clauses no term can express. The first is "Distribution of only part of The Program is not allowed.", a bar on partial distribution that is narrower than any prohibition in the vocabulary. Proposed term: dalicc:completeDistributionCondition. The second is the maintainer construction the later versions turn into a named role: version 1.1 has no Current Maintainer, but its conditions 6 and 7 already assume that somebody maintains the files. Both are quoted.
info Rubric 9 record none

The consistency check of app.services.composer against the axioms of licensedata/dependencygraph/dg_default.ttl returned no conflicts.
info Rubric 10 record none

The nearest sibling is LatexProjectPublicLicenseVersion13c. This record differs from it in five things: no cc:ShareAlike prohibition, dalicc:rename and dalicc:originalVersionOffer among the duties on odrl:modify and odrl:derive, no cc:SourceCode duty, dalicc:CreativeWork beside dcmitype:Software on the target, and the maintenance section quoted in dalicc:additionalClauses rather than in dalicc:WarrantyOrLiabilityAcceptance. Version 1.1 has no maintenance section at all, so that last difference shows only on the 1.3a record.
minor Rubric 4 odrl:prohibition applied

dalicc:promote was prohibited and no sentence of this text supports it. The statement was the library's reading of a legal default, that a copyright licence which says nothing about endorsement grants no right to it, and it sat in 519 of 581 records as a house convention. That reading is now an adopted dalicc:DefaultRule of the core dependency graph, which supplies it to every licence that is silent about the action, so a compatibility check reaches the same answer and the record states only what the text states. Removed on 2026-09-23; see section 13 of docs/LICENSE_REVIEW.md.

Report an issue The review record as JSON The review checks the model against the license text. It is not legal advice.

History

This license model has 2 versions. Version 2 is the one served today; every earlier version keeps its own address, so a conclusion drawn from one of them can still be checked against it.

Version 2 current2026-09-24 Giray Havur

The changes since version 1 left endorsement to the default rule of the core dependency graph, recorded which sentence of the text each statement rests on and named the license the record itself is published under.

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7 changes
- removed prohibition dalicc:promote
  
  Manual edit The endorsement prohibition rested on no sentence of the text; the default rule for endorsement now supplies it.
- changed permission dalicc:ChangeLicense with duties [dalicc:compliantLicense]
  
  was permission dalicc:ChangeLicense with duties [dalicc:compliantLicense]
  
  Manual edit The statement is marked as a library convention, family rule 15: Permissive records permit relicensing: the text does not state it in as many words. Its duty dalicc:compliantLicense is marked as a library convention, family rule 15: Permissive records permit relicensing.
- changed permission odrl:derive with duties [cc:Attribution, dalicc:modificationNotice, dalicc:originalVersionOffer, dalicc:rename]
  
  was permission odrl:derive with duties [cc:Attribution, dalicc:modificationNotice, dalicc:originalVersionOffer, dalicc:rename]
  
  Manual edit Its duty cc:Attribution quotes "In the modified file, you must acknowledge the authorship and name of the original file, and the name (if any) of the program which contains it." Its duty dalicc:modificationNotice quotes "You must change any identification string in the file to indicate clearly that the modified file is not part of The Program." Its duty dalicc:originalVersionOffer quotes "(A) distribute a copy of The Program (that is, a complete, unmodified copy of The Program) together with the modified file; if your distribution of the modified file is made by offering access to copy the modified file from a designated place, then offering equivalent access to copy The Program from the same place meets this condition, even though third parties are not compelled to copy The Program along with the modified file;" Its duty dalicc:rename quotes "You must not distribute the modified file with the filename of the original file."
- changed permission odrl:distribute with duties [cc:Notice]
  
  was permission odrl:distribute with duties [cc:Notice]
  
  Manual edit The statement now quotes the sentence of the licence text it rests on: "You may distribute a complete, unmodified copy of The Program. Distribution of only part of The Program is not allowed."
- changed permission odrl:modify with duties [cc:Attribution, dalicc:modificationNotice, dalicc:originalVersionOffer, dalicc:rename]
  
  was permission odrl:modify with duties [cc:Attribution, dalicc:modificationNotice, dalicc:originalVersionOffer, dalicc:rename]
  
  Manual edit Its duty cc:Attribution quotes "In the modified file, you must acknowledge the authorship and name of the original file, and the name (if any) of the program which contains it." Its duty dalicc:modificationNotice quotes "You must change any identification string in the file to indicate clearly that the modified file is not part of The Program." Its duty dalicc:originalVersionOffer quotes "(A) distribute a copy of The Program (that is, a complete, unmodified copy of The Program) together with the modified file; if your distribution of the modified file is made by offering access to copy the modified file from a designated place, then offering equivalent access to copy The Program from the same place meets this condition, even though third parties are not compelled to copy The Program along with the modified file;" Its duty dalicc:rename quotes "You must not distribute the modified file with the filename of the original file."
- changed permission odrl:reproduce
  
  was permission odrl:reproduce
  
  Manual edit The statement now quotes the sentence of the licence text it rests on: "You may distribute a complete, unmodified copy of The Program. Distribution of only part of The Program is not allowed."
- added dct:license <https://creativecommons.org/licenses/by/4.0/>
  
  Manual edit Every record is published under CC BY 4.0. cc:license names the record DALICC keeps of that licence; dct:license now names it by the address Creative Commons publishes it at, so that a consumer matching the canonical IRI finds it.
Version 1

Created from the license text on 2026-09-22 (Other OSI approved licenses (corporate, academic, weak copyleft)).

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Every change names the reason behind it: a finding of the content review, one of its library-wide decisions, the metadata that review wrote onto every record, or a hand edit. None of it is legal advice.

Nothing on this page is legal advice. What a license means is decided by its text; ask a legal advisor before you rely on it.