Derivative Work¶

Under U.S. copyright law, a work that recasts, transforms, or adapts a preexisting work, with new authorship and underlying rights assessed separately.

Version: v1 · 2026-10-17 · History
Domain-specific #: 14116
Domain group: Professional & Organizational Practice
Origin domain: Law & Governance
Subdomain: Copyright Law → Law & Governance

Core Idea¶

Under United States copyright law, a derivative work is a work based on one or more preexisting works in a form that recasts, transforms, or adapts them. The statutory examples include a translation and a musical arrangement.^[1] The repeatable relation is between the earlier work, the new recasting, and the legal status of each layer of expression. It can be applied to different kinds of work without treating every change or every reuse of an idea as the same legal event.

Three questions follow different rules. A work may fit the derivative-work description; its new contribution receives copyright only to the extent that it is original authorship; and use of protected expression from the earlier work may require a lawful basis under the copyright owner's rights and applicable limitations.^[1] The label alone answers neither originality nor infringement. If the earlier material is public domain, new authorship can be protected without recapturing that underlying material.^[1]^[2]

Structural Signature¶

Preexisting work — Identify the earlier work or works on which the new work is based. Without an earlier work there is no derivative relation.^[1]
Recasting operation — Show what expression is translated, arranged, transformed, or otherwise adapted into a new form. A shared topic or unprotected fact alone does not establish a taking of protected expression.^[1]^[3]
New work — Identify the resulting work separately from the earlier one. The classification concerns their relation, rather than an isolated property of either artifact.^[1]
Authorship and scope of additions — Determine whether the new material contains original authorship and, if so, isolate what that copyright covers. Section 103 limits protection in a derivative work to the contributor's own material; it does not enlarge rights in the earlier material.^[1]
Underlying-material status — Determine whether the earlier expression is still protected, is public domain, or includes unprotected ideas and facts. The relation can exist even when there is no current underlying copyright to assert.^[1]^[2]^[3]
Lawful-use basis — For protected underlying expression, separately ask who holds the relevant copyright and whether a license, exception, limitation, or other lawful basis permits the use. The derivative label itself is no infringement verdict.^[1]

The first three roles locate the classification. The last three direct the separate protection and lawful-use inquiries. They are part of the useful legal analysis, but their outcome is not a prerequisite that every derivative work must satisfy in the same way.

What It Is Not¶

Not automatically a protected new copyright. A mechanical copy has no added original authorship merely because it is called a new version. A trivial variation may also fail to supply enough original new expression. Whether a particular modification qualifies is a separate inquiry under the authorship and derivative-work provisions.^[1]^[2]

Not automatically an infringement. A derivative relation can involve public-domain material. Where underlying expression remains protected, authorization, fair use, and other statutory limits can affect the use. Section 106 grants the copyright owner a derivative-work right subject to limitations; section 107 states the fair-use rule.^[1]

Not ownership of the earlier work's expression. Copyright in original additions does not extend to preexisting material used in the new work.^[1] The new author and an underlying rights holder can have distinct interests.

Not every work with a borrowed idea or fact. Copyright does not protect ideas or facts as such, though it may protect their expression.^[1]^[3] A separate work sharing only an unprotected premise or fact does not thereby take protected expression from an earlier work.

Not the same as a compilation. Section 101 also defines a compilation by the selection, coordination, or arrangement of preexisting materials or data. That neighboring route must not be silently substituted for the recasting relation addressed here.^[1]

Scope of Application¶

The operative account here is bounded to U.S. copyright law. Section 101 lists translations, musical arrangements, dramatizations, abridgments, and other forms as examples; the list is illustrative rather than exhaustive.^[1] The Copyright Office's Circular 14 also presents translations and musical arrangements as generic examples.^[2] These are categories of possible work, not judgments about the originality, permissions, or fair use of an individual instance.

The same relation can be examined for writing and music, but other countries can set different statutory tests and consequences. No civil-law originality formula in the screened article is presented here as a universal or U.S. rule. This entry describes the U.S. statutory relation and its associated rights questions.

Clarity¶

The central distinction is classification versus protection versus lawful use. First ask whether the new work is based on an earlier work by recasting its form. Next ask whether the new material contributes original authorship, and restrict any new copyright to that contribution. Finally, if protected earlier expression is involved, ask whether its copyright owner controls the proposed use and whether authorization or a limitation applies.^[1]

These questions can yield different answers. An adaptation of public-domain material can have a derivative relation and potentially protectable new expression without a current copyright in the underlying work.^[1]^[2] A translation of a protected work may add original expression but still implicate the underlying copyright owner's derivative-work right.^[1] Neither general example settles a particular dispute.

Manages Complexity¶

The relation keeps two layers of authorship and rights from collapsing into one. It tracks what came from the earlier work, what the new maker contributed, and what legal status each layer has. Section 103(b)'s scope limit is the key: new protection does not extend to material that was already there, and it does not create an exclusive right in public-domain material.^[1]

That layered account supports a practical inventory. Identify the underlying work, the recasting, the new expression, the status of the earlier expression, the right asserted, and any lawful-use basis. The inventory does not replace fact-specific legal analysis. It prevents the category name from doing more work than the sources allow.

Abstract Reasoning¶

To test a proposed instance, start with the work relation rather than the reputation of its maker. What earlier work is involved? Which features of that work are carried into a new expressive form? A translation preserves and recasts literary expression; a musical arrangement recasts a composition's musical expression. Both are statutory examples, although their media and creative decisions differ.^[1]^[2]

Then change the question. What original material did the later maker add? Section 103(b) limits any resulting copyright to those additions.^[1] Change it again: is the earlier expression protected, who owns the relevant right, and does a license, fair use, or another limitation apply?^[1] The conclusion about one stage cannot simply be copied into the next.

Knowledge Transfer¶

The legal relation transfers literally across a novel translated into another language and a composition given a new arrangement. In both, an earlier work supplies expression, a new work recasts it, and rights in additions are distinguished from the status of the earlier material.^[1]^[2] The artistic choices and the copyright category of each source differ; the statutory relation persists.

Outside copyright law, an adaptation may mean a system adjusting to a changed environment. That broader word does not transfer the U.S. statutory test, the original-authorship threshold, or section 103's rights split. The Prime Adaptation can be a comparison about transformation, but it is not a substitute for this legal classification.

Examples¶

Canonical — literary translation¶

Consider a new-language translation of a preexisting novel, a class named by section 101 and Circular 14.^[1]^[2] The novel is the preexisting work; rendering its expressive text in another language is the recasting operation; the translated text is the new work. Original linguistic choices may supply authorship in additions, but that cannot be assumed from the category label.^[1] The novel's copyright or public-domain status fixes the underlying-material status; if protected expression is used, the relevant copyright owner's right and any authorization or exception determine the lawful-use basis.^[1]

Mapped back: preexisting work → novel; recasting → translation; new work → translated text; authorship/scope → original linguistic contribution, if any; underlying status → protected or public domain; lawful use → separately evaluated permission or limitation.

Applied / In Practice — musical arrangement¶

Consider an arrangement of a preexisting musical composition. The composition is the preexisting work; newly shaping its expressive musical material is the recasting operation; the resulting arrangement is the new work. Original arrangement choices may support copyright in the added material, while section 103(b) leaves the earlier composition outside that new claim.^[1] Whether the composition is protected, and whether a license or limitation applies to the use, are separate questions.^[1] The statute and Circular 14 both name musical arrangements as an example.^[1]^[2]

Mapped back: preexisting work → composition; recasting → arrangement; new work → resulting music; authorship/scope → original arrangement choices, if any; underlying status → composition's protection status; lawful use → separately evaluated permission or limitation.

Structural Tensions¶

T1: Creative reuse versus control of underlying expression. Translations and arrangements can produce new expression, and original additions may receive their own limited protection.^[1] Yet use of still-protected underlying expression can fall within the copyright owner's derivative-work right, subject to statutory limitations.^[1] Unrestricted reuse and full exclusive control over that same expression cannot both govern one use; licenses and statutory limitations allocate the conflict. Leaning entirely toward control restricts new recasting, while ignoring the underlying right erases the earlier rights layer. Diagnostic: Which protected expression is carried forward, who owns the implicated right, and what lawful-use basis applies?

Structural–Framed Character¶

Vocabulary travel: Translation and musical arrangement name unlike creative practices, yet section 101 applies the same derivative-work relation.^[1] Evaluative weight: The category does not praise the later work's originality or condemn its use. Human-practice dependence: Authors create and label works, but the legal classification depends on the work relation and governing law, not a label chosen by a maker. Institutional origin: U.S. statutory copyright law fixes the definition and consequences addressed here. Import versus recognition: Naming a derivative work imports a legal framework into a factual relation between works; a court or rights analyst must still determine what expression and rights the facts support.

Its character: a repeatable structural relation framed by a U.S. jurisdictional rule. It is neither a purely physical transformation nor a universal creative-work taxonomy.

Structural Core vs. Domain Accent¶

What can lift: A new product may depend on and transform prior material. That broad dependence can motivate comparison to Adaptation or other general patterns. A future Prime proposal would need at least two unlike noncopyright settings in which a prior creation, a substantive recasting, and a distinguishable new contribution jointly determine the same reasoning move without a copyright owner, statutory originality test, or section 103 rights split. Failure test: If the proposed second setting survives only by retaining those legal roles, or if its transformation has no dependency on a prior creation, the broader identity has not been shown. The two cases here stay within copyright and cannot establish it.

What stays in the domain: The derivative-work classification is fixed by U.S. statutory language about preexisting works and their recasting. The separation of new authorship, underlying rights, and lawful use depends on copyright provisions.^[1] Remove that law and one may still describe transformation, but one has lost the identity this entry is meant to explain.

This entry presupposes Copyright.

The live Prime Adaptation concerns a more general kind of system change. It is a related comparison, not a demonstrated parent of this legal entry. Property Rights is relevant through the copyright regime's divisible legal entitlements, while Copyright is the immediate domain neighbor that supplies the legal context. These comparisons do not establish that every derivative work instantiates an adaptation in the systems sense or that the work itself is a property right.

Relationships to Other Abstractions¶

Current abstraction Derivative Work Domain-specific

Parents (1) — more general patterns this builds on

Derivative Work presupposes Copyright Domain-specific

The U.S. derivative-work classification and its separate added-authorship and lawful-use inquiries presuppose the copyright regime that defines them.

Hierarchy path (1) — routes to 1 parentless root

Derivative Work → Copyright → Property Rights → Boundary

Neighborhood in Abstraction Space¶

Derivative Work sits in a sparse region of the domain-specific corpus (99^th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.

Family — Unclustered & Miscellaneous (2721 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-17

Not to Be Confused With¶

Copyright: The broad territorial regime containing subject-matter rules, rights, and exceptions. Derivative work names a narrower relation between preexisting and new works under U.S. law.
Adaptation: A general systems Prime whose identity is not the U.S. statutory work category.
Copyright in additions: A separate conclusion about original new authorship and the scope of its protection; derivative classification does not guarantee it.^[1]
Infringement: A separate conclusion about the relevant protected right, act, ownership, authorization, and limits.^[1]
Compilation: A neighboring statutory category concerning selected or arranged materials or data rather than necessarily recasting a preexisting work.^[1]
Derivative in calculus: A rate-of-change concept that shares a word, not this legal structure.

References¶

[1] U.S. Copyright Office, Copyright Law of the United States, Title 17, Chapter 1, especially §§101, 102(a)–(b), 103(a)–(b), 106(2), and 107. Official statutory text: https://www.copyright.gov/title17/92chap1.html. registry ↩a ↩b ↩c ↩d ↩e ↩f ↩g ↩h ↩i ↩j ↩k ↩l ↩m ↩n ↩o ↩p ↩q ↩r ↩s ↩t ↩u ↩v ↩w ↩x ↩y ↩z ↩27 ↩28 ↩29 ↩30 ↩31 ↩32 ↩33 ↩34 ↩35 ↩36

[2] U.S. Copyright Office, Copyright in Derivative Works and Compilations, Circular 14, PDF pp. 1–2, examples and rights-scope explanation. The circular's registration-policy discussion says current Compendium policy supersedes it; the statutory text supplies the operative rule. https://www.copyright.gov/circs/circ14.pdf. registry ↩a ↩b ↩c ↩d ↩e ↩f ↩g ↩h ↩i

[3] U.S. Copyright Office, “What Does Copyright Protect?,” FAQ, first answer on ideas, facts, and expression. https://www.copyright.gov/help/faq/faq-protect.html. registry ↩a ↩b ↩c