Consequence Mapping

Definition and scope

Consequence Mapping is the cartographic discipline concerned with recording the downstream effects of an archival action once it has been ratified and can no longer be reversed. It is distinguished from Citation Mapping, which records what a holding points to, and from Dependency Mapping, which records what a holding rests upon; Consequence Mapping alone proceeds in the forward direction, charting what a decision will cause rather than what it cites or requires. The practice is administered by the Office of Reciprocal Citation and is bound to the Narrative Tapestry of Consequence, which serves as its substrate. The discipline's foundational instrument is the retrospective forecast: a diagram drawn after an event, but formatted as though drawn before it, so that the sequence of cause and effect can be laid out with the clarity that only hindsight confers. Critics within the Librarians' order have long objected to this format. The objection is recorded and has not been upheld.

Relation to the Hall of Interwoven Outcomes

Consequence Mapping is the principal means by which the Hall of Interwoven Outcomes maintains its structural integrity. Each ratified action generates a filament of consequence; the mapper's task is to trace that filament to its terminus and mark it as either closed (its effects fully accounted for) or open (its effects still propagating). An open filament left unmapped for more than one administrative season is considered a hazard, and the Hall's custodians may requisition mapper-hours to address the backlog without prior notice. The relationship is not universally regarded as reciprocal. A faction associated with the Fifth Spiral Annex holds that the Hall generates consequences independently of any ratifiable action, and that the mapper's role is properly understood as transcription rather than derivation. This position, advanced most forcefully by the clerk Ostreth in a marginal note to the Pillarist Concordance, has not been incorporated into any binding Concordance.

Method

Standard practice, as set out in Concordance 114, Annex 6, proceeds in four movements:

1. Identification of the ratifying instrument and the moment of ratification.
2. Extraction of all downstream holdings touched, created, or invalidated within three floors of the originating event.
3. Classification of each effect as intended, unintended but benign, or unintended and contested.
4. Marking of the terminus, whether or not a terminus has been located.

The fourth movement is the source of most procedural difficulty. A consequence with no located terminus is marked with a dashed line and carried forward indefinitely; several floors of the Tower now carry such lines through their central aisles, where they are occasionally mistaken for shelf markings.

The Affair of the Receding Reference Desk

The practice's most consequential failure remains the handling of the Mapping the Receding Reference Desk affair. In the winter of the unrecorded year, a ruling by the Third Concordance altered the standing position of the Reference Desk by an undetermined distance. Consequence mappers were assigned to chart the effects. They produced, over eleven weeks, a diagram of considerable beauty showing that the Desk's movement had caused no downstream effects whatsoever. The diagram was not wrong. The effects existed, but they ran through holdings the mappers had no authorization to enter, and the mappers, applying the standard of the time, declined to trace them further than the boundary of their remit. The unresolved consequences were subsequently absorbed into the Counterfactual Crystals, where they remain legible but unmapped. The incident prompted the amendment now known as the Ostreth Clause, requiring mappers to record the limit of their search as an explicit element of the diagram rather than as an absence. The clause is frequently cited and, in practice, frequently omitted.

Points of disagreement

Concordance 114 and Concordance 209 contradict one another on the treatment of consequences that reverse direction. Concordance 114, Annex 6, holds that a consequence which returns to its originating holding and modifies it constitutes a closed loop and should be referred to Loop Mapping. Concordance 209, Clause 3, holds that such a return is a new consequence and must be mapped as a further movement of the same diagram. The two readings produce incompatible shelf diagrams, and both are currently in force on their respective floors. A second dispute concerns whether consequences can precede their causes. The matter was raised formally during the Re Mapping Amp Re Cataloguing Phase Iii proceedings and remains tabled.

Practical notes

Dashed lines indicating open consequences are to be repainted at each recension; the pigment used is not lightfast, and mappers working near the aperture galleries have reported that their markings fade faster than the events they describe. Visitors are reminded that consequence diagrams in the public aisles are working documents. Do not straighten them.