docs/CHANGELOG.md

Changelog

Each release is a git tag on this repository; load a specific one with revision="<tag>" in datasets.load_dataset.

Versioning follows these rules:

• Patch (v2.0.x): corrections to existing content (reference answers, source files, removal of duplicate or defective questions), even when corrected answers fall on the test side of the frozen split; surviving id values and split assignments never change.
• Minor (v2.x.0): added projects, models or questions.
• Major (vX.0.0): changes to the schema, the id scheme or the evaluation split.

The checksum of each release's questions/ifc-bench-v2.csv is listed in the README at that tag.

Unreleased

• wbdg_office: replaced the license.txt copied by mistake from dental_clinic with the original buildingSMART alliance reuse terms of the Common BIM Files, and relabelled the model card and README entry from CC BY 4.0 to those terms.
• ac20, fzk_house, smiley_west: replaced the CC BY 4.0 license.txt with the KIT "unrestricted use" terms and source line published on the KIT IFC Examples page, and relabelled the README entries to match the model cards.

v2.0.3 (2026-10-07)

• Corrected the reference answers of 69 questions and the encoding of one question text (Q269); no id or split assignment changed (#12, discussion #9).
• Repaired the remaining Mac Roman mojibake (e.g. TÖºr to Tür) in 54 answers across 9 projects.
• fzk_house: labelled net and gross areas in Q512 and Q541, unified area units to m², aligned the structural element count in Q508 with Q544 (50), fixed the double-counted walls in Q554 (82 elements), moved the HANDRAIL type to the railing occurrences in Q539, and dropped details the questions do not ask for in Q513, Q536 and Q547.
• smiley_west: fixed the Kalksandstein 175 layer thickness in Q917 (0.175 m).
• fantasy_hotel_1: removed the wrong total in Q356.
• 37 of the changed questions belong to the test side of the frozen split, 7 of them with content changes (512, 513, 536, 541, 547, 554, 917); test scores on v2.0.3 are not directly comparable with earlier releases.

v2.0.2 (2026-10-01)

• Corrected the reference answers of 61 questions; no question text, id or split assignment changed.
• Restored the corrupted Molio IFC source (projects/molio/arc.ifc) and corrected the 33 dependent Molio answers (#8).
• Corrected unsupported answers and definitions across 4351, dental_clinic, digital_hub, hitos, schependomlaan, sixty5 and wbdg_office (#7, #8).
• fzk_house: fixed the window width extremes in Q519 and Q520 (#3), dropped two unreproducible element counts (issue #5), labelled gross and net floor areas and fixed coordinates, railing type and text encoding (#10, discussion #9).
• smiley_west: fixed the 2.OG spaces, wall type counts, a wall layer thickness, a missing slab type and text encoding (#11).
• 21 of the changed questions belong to the test side of the frozen split, so test scores on v2.0.2 are not directly comparable with v2.0.1 or with Hellin et al. 2026.

v2.0.1 (2026-07-01)

• Removed the train-side copy of a question duplicated across the frozen split (former id 21); see Deduplication note.

v2.0-frozen-split (2026-07-01)

• Added the seven West Riverside Hospital models (without QA pairs) and corrected one answer.
• Added the stable id column and the frozen 514-question evaluation split used in Hellin et al. 2026; snapshot taken before deduplication.

v2.0.0 (2026-02-05)

• First v2 release: 21 projects, 37 BIM models, 1027 QA pairs, with licensing updated to flag the GPL-3.0 models.