Definition
A detailed, written statement of particulars. The term carries distinct meanings across several legal contexts, each sharing the common thread of precision and enumeration.
1. Patent Law. The written document accompanying a patent application that fully describes an invention — its nature, construction, operation, and manner of use — with sufficient clarity to enable a person skilled in the relevant art to replicate or practice it. In U.S. patent practice, the specification includes both the written description and the claims, which are the operative boundaries of patent protection. Historical sources sometimes use "specification" to refer only to the descriptive portion, excluding claims; modern U.S. practice treats both as components of the specification as a whole.
2. Contract and Construction Law. A detailed written statement of materials, workmanship, dimensions, and standards required for the performance of a contract, most commonly encountered in building and construction agreements. Specifications of this kind are typically incorporated into or attached to the contract itself and govern how work is to be executed.
3. Military Law. The clear and particular description of the charges preferred against a person accused of a military offense. The specification in a court-martial proceeding functions analogously to a criminal charge or count — it identifies the offense, the accused, and the time, place, and circumstances of the alleged act with sufficient particularity to inform the accused and frame the proceeding.
4. General Usage. More broadly, any itemized or detailed account of particulars — as in a specification of items in a claim, invoice, or pleading. This usage is largely archaic in formal legal contexts but appears frequently in older case law and practice materials.
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Common Language
Modern common usage (Wiktionary): An explicit set of requirements to be satisfied by a material, product, or service; or an act of specifying.
Historical common usage (Webster's 1913): The act of specifying or determining by a mark or limit; the designation of particulars; a written statement containing a minute description or enumeration of particulars.
The common and legal meanings share a core — detailed enumeration — but diverge in consequence. In ordinary usage, a "specification" is essentially a requirements document: it describes what something should be. In patent law, the specification is a legal instrument with statutory requirements; its adequacy or inadequacy determines the validity and scope of a patent grant. Researchers treating the patent specification as merely descriptive will miss its constitutive legal function.
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Common Confusion
Patent Law — Specification vs. Claims. Older sources, including Bouvier's and Burrill's, use "specification" loosely to mean the entire patent document or, conversely, only the descriptive narrative portion. Modern U.S. patent law treats the claims as part of the specification but conceptually distinguishes the two: the written description enables the invention; the claims define the legal boundaries of exclusivity. A historical source saying a "specification" was defective may mean the description was inadequate, the claims were defective, or both — context is essential.
Specification vs. Charge (Military Law). In courts-martial practice, a "charge" names the offense category (e.g., conduct unbecoming); the "specification" supplies the factual particulars. The two are paired but distinct. Sources conflating them, or using "charge" to mean both, are common in pre-20th-century military law materials.
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Recognized Forms
/SUBTYPES
Provisional Specification (Patent Law). In British patent practice, a preliminary filing describing the invention in general terms, followed later by a complete specification. Rapalje & Lawrence references this distinction. U.S. law does not use the term "provisional specification" — the U.S. provisional application is a distinct procedural mechanism, not a specification in the technical sense.
Complete Specification (Patent Law). The full, formal written description required to prosecute and secure a patent, as distinguished from a provisional filing. Primarily a term of British and Commonwealth patent law.
Performance Specification (Contracts). Specifies required outcomes or standards rather than methods of construction or materials. Distinguished in construction practice from a prescriptive or design specification, which dictates precisely how work is to be done.
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Why It Matters in Research
The term is a chameleon. A researcher encountering "specification" in a 19th-century source must immediately identify the field — patent, contract, military — before the word carries any navigable meaning. The hazard is compounded because all three usages appear in general legal dictionaries without domain labeling, and courts of the period occasionally imported meaning from one domain into another.
In patent research, the evolution is significant. Burrill's definition (drawn from Kent's Commentaries) captures the pre-claim-era understanding, when the specification was primarily a disclosure document. The bifurcation between description and claims — and the legal consequences that now attach to each — emerged through statutory development and judicial construction over the 19th and 20th centuries. A researcher using Burrill's or Bouvier's to interpret a patent specification dispute from 1840 is working in a world where "claims" as operative legal units barely existed. The Law Mind IP Encyclopedia entry on 35 U.S.C. § 112 requirements provides the modern framework against which historical materials should be benchmarked.
In construction and commercial contract research, "specifications" frequently appear as exhibits or attachments rather than in the body of agreements. Whether specifications are incorporated by reference, how conflicts between specifications and contract terms are resolved, and what level of deviation triggers a breach are recurring issues. The maxim noted in Black's 2nd Ed. — that a special provision on a particular subject controls over general language — is directly implicated when contract terms and specifications conflict.
In military law research, the specification functions as the charging instrument for purposes of notice, double jeopardy analysis, and appellate review. Researchers working with court-martial records should treat the specification as the operative factual allegation, not merely a procedural formality.
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Historical Dictionary Support
The six source dictionaries largely agree on the core definition — detailed, particular description — but differ in emphasis and coverage. Burrill's provides the most technically precise treatment of the patent specification, reproducing language close to the statutory standard and grounding the definition in Kent's Commentaries. Bouvier's adds the useful note that "specification" in patent law, used without the word "claim," means description and claims together — a point that resolves ambiguity in older sources. Black's 1st Ed. offers the broadest coverage, spanning patent, contract, and military law contexts in a single entry. Anderson's gestures toward the general usage — "a statement of species or particulars" — capturing the pre-technical meaning that still surfaces in older pleadings and commercial documents.
Rapalje & Lawrence is notably fragmentary on this entry; the surviving text addresses only the patent petition context and drifts into an unrelated passage, offering limited independent value. Researchers should treat that source's treatment of specification as incomplete.
None of the historical dictionaries fully anticipates the modern doctrine surrounding patent claim definiteness or the consequences of specification inadequacy under contemporary statutory and judicial frameworks. Their treatment of military specification is also thin relative to the actual procedural significance of the instrument in courts-martial practice.
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Jurisdictional Note
Patent specification requirements are governed by federal law (35 U.S.C. § 112) and are uniform nationally, though claim construction and adequacy are extensively litigated. In construction contract law, the interpretation of specifications varies by state contract law principles, and some jurisdictions have specific rules for public contracts that control how discrepancies between plans and specifications are resolved.
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Encyclopedia Cross-Reference
ip_10: Claim Drafting and Specification — 35 U.S.C. § 112 Requirements (The Law Mind Intellectual Property Encyclopedia)
contracts_89: Remedies — Specific Performance (Availability and Requirements) (The Law Mind Contracts & Commercial Law Encyclopedia)
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