Eivora platform

Papertrail

The file-derivation engine for the unstructured side of the platform. Papertrail picks up at an ingestion_file and derives everything below it — original mirror, rasters, crops, transcripts — so any statement traces back to the bytes it was read from. It never acquires and never resolves identities.

Provenance spine

  1. 01

    ingestion_file

    The immutable original, acquired and written by ingestor — the one anchor.

  2. 02

    register

    Papertrail mints the kind="original" mirror row and projects the subject link.

  3. 03

    rasterize

    Planner + worker steps emit one page_raster row + PNG per page under derived keys.

  4. 04

    crop / evidence

    Locators materialize into crops; statements trace back by FK-walk, never string parsing.