{"id":"LPPL-1.0","title":"LaTeX Project Public License, Version 1.0","reviewed_on":"2026-09-22","reviewer":"Giray Havur","text_source":"https://raw.githubusercontent.com/spdx/license-list-data/main/text/LPPL-1.0.txt","text_retrieved":true,"verdict":"created","summary":"The record models version 1.0 of the LaTeX Project Public License, the licence the base LaTeX distribution is published under. It lets you pass a complete, unchanged copy on and lets you distribute a changed file only if you rename it, say in the file that it is changed and no longer part of the program, credit the original, redirect error reports and give the recipient a way back to the unmodified version. The model follows the 1.3c record the library already holds and adds the rename and original-version duties that this text states. Nothing here is legal advice.","findings":[{"rubric":1,"severity":"info","field":"spdx:licenseId","description":"The file name, the local name of the odrl:Set IRI, the SPDX identifier and the id of this review record are all LPPL-1.0. cc:legalcode points at the LaTeX Project's own page for this version and dct:source at the SPDX page. The library already holds the 1.3c text under the descriptive id LatexProjectPublicLicenseVersion13c; this record keeps the SPDX id as its identifier, the way every record added since 2026-09-15 does.","action":"applied"},{"rubric":2,"severity":"minor","field":"odrl:target","description":"odrl:target carries dalicc:CreativeWork and dcmitype:Software. The licence governs program files and the documentation that travels with them: \"Redistribution of unchanged files is allowed provided that all files that make up the distribution of The Program are distributed. In particular this means that The Program has to be distributed including its documentation if documentation was part of the original distribution.\" The 1.3c record in the library lists dcmitype:Software alone, which is why this record differs from its nearest sibling in one asset type.","action":"applied"},{"rubric":3,"severity":"major","field":"odrl:permission","description":"The licence grants distribution and modification and says nothing about other uses. The permissions follow the text. odrl:reproduce, odrl:distribute, odrl:display and odrl:present follow from \"Redistribution of unchanged files is allowed provided that all files that make up the distribution of The Program are distributed\", odrl:modify, odrl:derive, cc:DerivativeWorks and dalicc:ModifiedWorks from the conditions under which a modified file may be distributed. cc:CommercialUse and dalicc:chargeDistributionFee are permitted because the text bars neither. dalicc:ChangeLicense is permitted and carries the dalicc:compliantLicense duty, because the licence requires the modified file to move to another licence with a named property: \"Any such changed files must be distributed under a license that forbids distribution of those files, and any files derived from them, under the names used by the original files in the distribution of The Program\".","action":"applied"},{"rubric":4,"severity":"major","field":"odrl:prohibition","description":"Three. cc:ShareAlike is prohibited, because the licence does not require the modified file to stay under the LPPL; it requires the opposite, a licence that forbids reuse of the original file names. dalicc:addLimitation is prohibited, from \"no file should have restrictions on distribution other than those specified below\". dalicc:promote is prohibited, from \"your license should not directly refer to the LPPL or otherwise give the impression that The Program is distributed under the LPPL\" read with \"You change any `identification string' in The Program to clearly indicate that the file is not part of the standard system\": neither the licence document nor the name of The Program may be used to suggest that a modified file is the original or that a different licence is the LPPL. The 1.3c record prohibits the same three.","action":"applied"},{"rubric":5,"severity":"major","field":"odrl:duty","description":"odrl:distribute carries cc:Notice and cc:SourceCode, the completeness rule \"Redistribution of unchanged files is allowed provided that all files that make up the distribution of The Program are distributed\". odrl:modify and odrl:derive carry five duties: cc:Attribution from \"You acknowledge the source and authorship of the original version in the modified file\", cc:SourceCode from the same completeness rule, dalicc:modificationNotice from \"You change any `identification string' in The Program to clearly indicate that the file is not part of the standard system\", dalicc:originalVersionOffer from \"You also distribute the unmodified version of the file or alternatively provide sufficient information so that the user of your modified file can be reasonably expected to be able to obtain an original, unmodified copy of The Program\", and dalicc:rename from \"You rename the file before you make any changes to it, unless the file explicitly says that renaming is not required\". dalicc:rename and dalicc:originalVersionOffer are what this licence is about and the 1.3c record does not carry either, which is the largest difference between this record and its sibling.","action":"applied"},{"rubric":6,"severity":"info","field":"dalicc:additionalClauses","description":"dalicc:WarrantyDisclaimer and dalicc:LiabilityLimitation hold the two paragraphs of the warranty section, each in its own field. dalicc:additionalClauses holds the distribution and modification conditions in full, the rules for the LaTeX file name extensions, and the sentence about files that bear their own conditions, so a reader can see the wording every duty was read from. The quoted text keeps the licence's own bullet and number markers.","action":"applied"},{"rubric":7,"severity":"info","field":"cc:jurisdiction","description":"cc:jurisdiction is dalicc:worldwide and dalicc:validityType is dalicc:perpetual: the text names no country, no governing law and no term. It also states no termination clause, so dalicc:terminatesOnBreach is absent, which says the text is silent rather than that the licence cannot end.","action":"applied"},{"rubric":8,"severity":"gap","field":"dalicc:additionalClauses","description":"Two clauses have no vocabulary term. The error-report rule, \"If The Program includes an `error report address' so that errors may be reported to The Copyright Holder, or other specified addresses, this address must be changed in any modified versions of The Program\", is neither a rename nor a modification notice; proposed term: dalicc:errorReportRedirection, a duty action. And the per-file conditions, under which an individual file may carry its own modification rules while the distribution rules stay the same for every file; proposed term: dalicc:perFileConditions, an annotation. Both are quoted instead.","action":"none"},{"rubric":8,"severity":"info","field":"dalicc:orLaterVersionOption","description":"The licence document itself grants no later-version option. The example notice the preamble recommends does, \"either version 1 of the License, or (at your option) any later version\", but that is wording the author of a program chooses to put in the file, not a grant this licence makes. dalicc:orLaterVersionOption is therefore absent, as it is on the 1.3c record, whose preamble recommends the same notice.","action":"none"},{"rubric":9,"severity":"info","field":"record","description":"The consistency check of app.services.composer against the axioms of licensedata/dependencygraph/dg_default.ttl returns an empty list for this record.","action":"none"},{"rubric":10,"severity":"info","field":"family","description":"The nearest sibling is LatexProjectPublicLicenseVersion13c, which the library has held since before the 2026-09-15 review. This record keeps that record's shape: dalicc:ChangeLicense permitted with dalicc:compliantLicense, cc:ShareAlike prohibited, dalicc:addLimitation and dalicc:promote prohibited. It differs in four places, each from the text: dalicc:CreativeWork is added to the target, dalicc:rename and dalicc:originalVersionOffer are added to the adaptation duties, and odrl:grantUse, dalicc:addStatement and dalicc:noWarrantyNotice are left off, because the 1.0 text grants none of the three. dalicc:variantKind is \"version\", the kind the library gives to the 52 records that model an earlier text of a licence it also holds.","action":"none"},{"rubric":4,"severity":"minor","field":"odrl:prohibition","description":"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.","action":"applied","change":"# removed\nodrl:prohibition [ a odrl:Prohibition ;\n        odrl:action dalicc:promote ] ;\n"}],"family":"Other OSI approved licenses (corporate, academic, weak copyleft)","port_of":null,"variant_kind":"version","variant_of":null,"notes":"Modelled from the SPDX plain text of LPPL-1.0 and checked against the LaTeX Project page in cc:legalcode. The family name is the one the 1.3c record uses, so that the three LaTeX records group together; version 1.0 is not itself OSI approved, only 1.3c is. No quoted clause carries a long dash."}