Class D

Class D is the designation applied throughout the Tower to documents, instruments, and fixtures that have been formally determined to bear no content, no function, and no referent, yet which remain subject to full archival custody. A Class D holding is not blank, discarded, or superseded; it is retained, shelved, and cited, but nothing may be done with it. The class was established under Fourth Concordance, Annex 11, and has been amended on nine occasions, of which seven were themselves determined to be Class D and are accordingly filed but of no effect.

Class D is distinguished from Class R-1 in that ephemera decay; Class D does not. It is distinguished from Archival in that Class R material has a subject. The defining test, set out in Sixth Concordance §2.4, is that a holding qualifies for Class D when three sworn readers drawn from separate scriptoria independently report having read it and are unable to state what it was about, and the reports themselves, once compared, contain no agreement beyond that inability.

Procedure and the Reading Record

Determination is made by a panel of three, seated for no longer than the time required to read the holding aloud twice. The panel does not deliberate. Its finding is entered in the Register of Non-Contents and stamped with the Class Beta Unbound Attribute only where the holding originated in a Beta-class log; holdings of independent origin are stamped Class A neutral, which confers no privilege but exempts the panel from further summons for one year.

Where a Class D holding is subsequently found to contain meaning — a rare but recorded event — it is elevated and the panel is reconvened to explain the earlier finding. The explanation is entered as a Class D holding. Clerk-Arkivist Second Class Perrine Halloway, who sat on eleven panels between 618 and 631, is recorded as having objected to this arrangement in a memorandum of 629 that the Office of Recensions classified as Class D in 630, thereby closing the matter.

Scholarly Disagreement

The principal dispute concerns whether Class D is a class of objects or a class of findings. Seventh Concordance, Annex 2, holds that Class D adheres to the document itself and travels with it wherever it is copied; Eighth Concordance, §9.1, holds that Class D adheres only to the determination, so that a copy made after determination is an ordinary document until separately read. The two Concordances have never been reconciled, and the Standing Committee on Class Reconciliation has met continuously since 604 without reaching the second item on its agenda.

In practice the Tower follows the Eighth. This is not a resolution but a consequence: the Register records determinations, not documents, and no clerk has ever been found willing to reconcile the Register against the shelves. The Librarians have declined four times to comment, on the ground that comment would constitute a finding.

"A Class D may be cited. It may not be relied upon. The distinction is the whole of the class."

— Fourth Concordance, Annex 11, clause 3

The Halloway Inventory

The largest Class D accession on record is the Halloway Inventory of Floor 388, compiled in the winter of 631 after a routine sweep of the floor's eastern stacks returned an inventory listing 1,140 items, none of which the sweep party could describe. The inventory itself, when read by the panel, could not be described either. It was classified Class D on 4 February 632. The following year a second sweep of the same stacks produced an inventory of 1,144 items, and the discrepancy of four has never been accounted for. Both inventories are shelved together and may not be separated.

Visitors to the eastern stacks are asked to leave their outer coats with the attendant at the stair-head. Nothing in the Concordances requires this.

Interaction with Other Classes

Class D holdings are excluded from the cascading revisions required of Class Alpha procedures under Class Δ, on the reasoning that a procedure with no content cannot contradict one. They are likewise exempt from the septennial re-certification demanded of Beta-class logs, though the exemption is granted by an instrument that is itself Class D, a circularity the Office of Recensions has described as "sound but unhelpful" (Memorandum 41, 587).

Class D material may not be entered into Sigma-class descent operations, since descent requires a referent to descend toward. It has twice been mistaken for Class Γ material during floor-wide audits, and on both occasions the error was corrected only after the echoes failed to arrive.

Custody

Class D holdings are shelved by chronological accession rather than by the decimal scheme, since decimal placement implies subject. They are dusted on the same schedule as everything else. Retrieval requires a written request naming the holding, which the requesting clerk must be able to name without having read it.