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Research dossier · History & Society

Public-domain-equivalent license

license that waives all copyright and related rights, to the extent permitted by the law in each jurisdiction

Layered newspapers, civic records and oral-history reels arranged as chronological evidence
History and societyInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 16, 2026
Entity authorityQ25047642 ↗
Source-derived summary

Public-domain-equivalent licenses also known as public-domain-like licenses are licenses that grant public-domain-like rights and/or act as waivers. They are used to make copyrighted works usable by anyone without conditions, while avoiding the complexities of attribution or license compatibility that occur with other licenses.

No permission or license is required for a work truly in the public domain, such as one with an expired copyright; such a work may be copied at will. Public domain equivalent licenses exist because some legal jurisdictions do not provide for authors to voluntarily place their work in the public domain, but do allow them to grant arbitrarily broad rights in the work to the public.

The licensing process also allows authors, particularly software authors, the opportunity to explicitly deny any implied warranty that might give someone a basis for legal action against them. While there is no universally agreed-upon license, several licenses aim to grant the same rights that would apply to a work in the public domain.

Licenses

General

WTFPL

In 2000, the "Do What the Fuck You Want To Public License" (WTFPL) was released as a public-domain-equivalent license for software. It is distinguished among software licenses by its informal style and lack of a warranty disclaimer. In 2016, according to Black Duck Software, the WTFPL was used by less than 1% of FOSS projects.

CC0

In 2009, Creative Commons released CC0, which was created for compatibility with jurisdictions where dedicating to public domain is problematic, such as continental Europe.

Editorial summary

“Public-domain-equivalent license” enters the record as license that waives all copyright and related rights, to the extent permitted by the law in each jurisdiction. Crown Archives preserves that source wording while asking what Public-domain-equivalent, license and waives can confirm, complicate or overturn.

Editorial reviewA strong contextual entry point for chronology, institutions and public events when official records are distinguished from later interpretation. The current lead gives the account dated anchors—2000, 2016, 2009—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around Public-domain-equivalent, license and waives.
Editorial analysis

Why this record matters

“Public-domain-equivalent license” is worth following because a concise public description often conceals a longer documentary argument. Here, Public-domain-equivalent, license and waives provides the most credible route into that argument.

Evidence profile

Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Aug 16, 2026. The linked authority identifier is Q25047642. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2000, 2016 and 2009.

Critical limits

Official terminology may obscure informal participation, dissent or communities documented only indirectly. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Compare institutional narratives with records created by participants and affected communities. Dates and formal titles are useful anchors, but not substitutes for context.

Best used for
  • Event chronology
  • Institutional context
  • Locating named record creators
Verify next

Contemporary correspondence, government or organizational records, oral histories and cited historical scholarship.

Three-step research path

  1. Establish the record: confirm the title “Public-domain-equivalent license”, its source revision and the description used here.
  2. Expand the search: follow Public-domain-equivalent license primary sources, Public-domain-equivalent license archive and Public-domain-equivalent research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Public-domain-equivalent license”?
  2. Who created the surviving record, and for what administrative purpose?
  3. What chronology connects this entry to wider political or social change?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “Public-domain-equivalent license” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.