Domain

Definition and Standing

Domain is the primary unit of territorial description used throughout the Tower's records, denoting any contiguous body of holdings, abstractions, or jurisdictions over which a single authority may claim competence. The term is applied without regard to size: a single corridor of shelving and an entire abstraction-wing may each be designated a domain, provided the designation is recorded and sealed.

The standing definition is Concordance-sourced and remains in force despite three failed revisions. A domain is "that over which a claim of competence can be stated in a single clause without conjunction."¹ The clause test has itself produced considerable litigation, since most real domains require at least two clauses, and a few famous ones require four.

Historical Development

Early catalogues did not use the word. Pre-Concordance inventories described holdings as belonging to a hand, to a reach, or, in the oldest scriptoria, to a quiet — a term now considered archaic and retained only in floor-names. The shift to "domain" is generally dated to the settlement following the Silent Stair disputes, when it became necessary to describe a jurisdiction that had no physical extent and yet could still be entered.

The word was adopted partly at the insistence of the early Archivists, who found that "hand" implied a single keeper and "reach" implied an arm. Domain implied neither, and by the mid-recensions it had displaced both.

Bounding and Measurement

Domains are bounded by one of four recognised methods: by Harmonic Mapping, by concordant citation, by natural terminus (a stair, a sealed door, a cessation of shelving), or by long custom unchallenged. Harmonic Mapping is preferred where the boundary is unstable, since it produces a bound that adjusts without requiring a new seal. The Fourth Concordance's appendices on the Radial Domain are the standard worked example: the orbits there are adjusted frequently enough that a fixed bound would need reissuing eleven times a year.

Measurement is not required. A domain with no stated extent is not thereby defective; it is merely unmeasured, and unmeasured domains are common in the upper recensions where the shelving does not hold still.

Overlapping Claims

Two domains may occupy the same holdings simultaneously without contradiction, provided the claims are of different kinds. A jurisdictional domain and a custodial domain may be coextensive; a custodial domain and an abstract domain may be coextensive; two jurisdictional domains may not. The last case is the standard trigger for Concordance litigation and has produced some of the archive's longest-running disputes.

The most frequently cited instance is the double claim over the floor catalogued as Nothing, Arranged, where the Galleries of Attenuated Light assert custodial authority and the Department of Ontic Verification asserted jurisdictional authority until its mandate lapsed. The custodial claim survived. The jurisdictional claim is still listed, sealed, and unanswered.

"A domain is not a place. It is a sentence that has been allowed to stand."

— High Curator Elara, marginalia to the Census of Potentialities

Contested Cases

The Census of Potentialities attempted to enumerate all domains then recorded and produced a total that changed between recensions. The discrepancy was never resolved; it was annotated. High Curator Elara's objection — that the census confused a ledger for a universe — is now standard citation in objections to any attempt at a complete domain register.

A smaller but persistent disagreement concerns whether a domain can exist without an authority to claim it. The Bureau of Procedural Paradoxes maintains that such domains are simply unclaimed and waiting; the older view, associated with the Archive of Lost Protocols, holds that authority and domain arose together and that one cannot precede the other. Neither position has been formally adopted, and both are cited in current rulings, sometimes in the same document.

Related Provisions

Provisions concerning domains are scattered across the Concordances rather than consolidated. The Seventh Concordance (Orbital) defines its jurisdictional boundary by reference to the Tetrahedral Moon. The Third Concordance governs abutting domains. The Sub-Lexical Humours maintain a domain that is recognised in principle and whose extent has never been stated, on the ground that stating it would vocalise it.

Copies of the standard domain-seal are available from the scriptorium on the floor numbered 4, second drawer from the left. Visitors are reminded that seals affixed to a door do not extend the domain beyond that door, however firmly they are pressed.