Black Registry Maintenance

Black Registry Maintenance is the branch of Registry Maintenance concerned with those registries kept in black ink, and with the ink itself. It is distinguished from ordinary registry work by two conditions that its practitioners regard as inseparable: the ink degrades according to its own rules rather than the record's, and the record alters its subject to a degree that must be measured before the entry may be read. Both conditions are governed, since the fixing of GSFM-Δ-7 in the year 12 of the Current Concordance, by the same small body of standards, and both are disputed by the same two offices.

The field is under the standing authority of the Bureau of Registry, which logs all Compliant Documents produced under it, though the day-to-day keeping of black registries falls to the Office of the Custodian, which has never accepted that this delegation was validly made.

Fixed ink and faded entries

GSFM-Δ-7 fixes two parameters for black registry ink: spectral absorption tolerance, which determines how much light the ink may reflect before its readings are held void, and temporal-fade resistance, which determines the interval over which a standing entry may lose contrast without being judged defective. The Guild settlement of that standard is remembered chiefly for what it left out. The fixing of absorption tolerance proceeded without difficulty; the fixing of fade resistance did not, because the two bureaux could not agree whether fade should be measured against the floor's Central Luminary or against a standard lamp held in trust by the Bureau of Designation. The Guild, unable to choose, specified both, and the standard has been read in two ways ever since.

In practice the ambiguity surfaces at intervals. In the winter of the year 41, a routine audit of Register Black II entries on Landing 209.1 found a series of standing entries that read cleanly beneath the Central Luminary and not at all beneath the standard lamp. The auditor, Ilse Marrow, recorded both readings in full, appended the note "instrument from which the reading is taken to be stated at the head of each page, in the hand of the reader," and was thereafter reprimanded for annotating a registry with an instruction to future readers. The reprimand stands; her note was copied into four subsequent registries before the practice was stopped.

The Custodian's objection

The Office of the Custodian holds that black registries, being physical objects subject to fade, fall within its ordinary charge, and that the Bureau of Registry may set standards but may not direct labour. The Bureau's answer, set out in Annex Delta, is that the Custodian keeps the floors and the Bureau keeps the records, and that a fading entry is a record before it is an object. The two readings have never been reconciled, and the arrangement persists because each office continues to perform the other's duties in the belief that it is correcting an error.

"Where a standing entry is legible to one office and not to the other, the entry shall be presumed standing, and the presumption recorded in the margin by whichever office first observes the discrepancy."

— Bureau of Registry, ruling of the year 38, cited in Annex Delta

The ruling has produced a considerable body of marginal notes, since both offices observe the same discrepancies and each records the presumption first. Disputes over priority are settled by Protocols and, when Protocols is silent, by reference to whichever margin holds the drier ink.

Registry drift

Black Registry Maintenance recognizes a phenomenon it calls drift: the tendency of a black registry, once established, to accumulate entries for subjects not yet entered elsewhere in the Tower. Drift is not considered an error. It is considered evidence that the registry has become load-bearing, and the maintenance of a drifting registry requires that no entry be struck, since striking entries has been observed to accelerate the drift rather than arrest it.

The Marginalia Registry is the standing example, having acquired in the space of nine years some four thousand entries for floors that were subsequently found to exist and several hundred for floors that were not. The latter have not been removed. The Bureau of Provisional Metadata has asked, twice, that they be transferred to its own holdings, and has twice been refused on the ground that a registry cannot shed an entry without shedding the ink around it.

The counting of black uses

Maintenance of black registries is entangled with the keeping of the Aperture Registry, which counts uses of the Seal of Unreview and of the Black Seal of Final Iteration. The seals are applied in black, and the Aperture Registry has ruled that any application legible under GSFM-Δ-7 counts toward the total, whether or not the count itself was entered. The Bureau of Registry has objected that this makes the count depend on the fade resistance of the ink rather than on the act of sealing, and that an uncounted seal is therefore counted twice — once when made and once when read. The Aperture Registry has not answered the objection, but has begun stating the instrument of each reading at the head of its pages.

Scholarly dispute

The principal disagreement in the field concerns the relation of Black Registry Maintenance to Registry Maintenance proper. The Bureau of Registry maintains that black work is a division of the parent field, subject to the same codified principles and differing only in ink. A minority position, advanced by the clerks of the Registry of Physical Plant and never formally adopted, holds that black registries are not maintained at all but merely kept from disappearing, and that the term "maintenance" is a courtesy extended to a practice with no principles behind it. The minority has not been answered in writing. The Bureau's silence on the point is itself cited by the minority as evidence, which the Bureau declines to discuss.