With the release of Acorn 8 last December, I published "ACTN002 Acorn's Native File Format" as part of the documentation updates, which is exactly what it sounds like. Without going into details (that's what the technote is for), Acorn's file format is a SQLite database, with a simple three-table schema, containing TIFF or PNG bitmaps to represent bitmap layers, and a plist to represent shape layers. Acorn has kept this simple format since version 2.0 back in 2009. And since the format is a S...
