PROVENANCE — input/duplex_apartment_ifc2x3.ifc
================================================

Source model : "Duplex Apartment" IFC 2x3 test file (student competition
               design, first used at the Dec 2009 COBie challenge; exported
               by Autodesk Revit Architecture 2011).
Distributor  : buildingSMART International (2020), "Duplex Apartment Test
               Files", buildingSMART community sample test files, https://github.com/buildingsmart-community/Community-Sample-Test-Files/tree/main/IFC%202.3.0.1%20(IFC%202x3)/Duplex%20Apartment
License      : Creative Commons Attribution 4.0 International (CC BY 4.0),
               as granted by the distributor's README: the files may be
               copied and redistributed in any medium or format and
               remixed, transformed, and built upon, for any purpose,
               provided attribution is given and changes are indicated.
               https://creativecommons.org/licenses/by/4.0/
Required
attribution  : "BSI (2020) 'Duplex Apartment Test Files,' buildingSMART
               International" + the repository URL above.
Local copy   : fetched from the byte-identical public mirror used by the
               ThatOpen/web-ifc test suite (https://raw.githubusercontent.com/ThatOpen/engine_web-ifc/master/tests/ifcfiles/public/duplex.ifc)
SHA-256      : b347a2c8aa8fff6db896a4417a9c50c22ac0ccd7c5cfc22b99b8d29336c606ed
Size         : 2380763 bytes
Schema       : FILE_SCHEMA(('IFC2X3')) (verified)

Modifications applied locally (CC BY 4.0 requires indicating changes):
- FILE RENAME ONLY: duplex.ifc -> duplex_apartment_ifc2x3.ifc.
  The file contents are UNMODIFIED (byte-frozen; the SHA-256 above is the
  upstream content hash). All task materials derived from the model (the
  exported space schedule CSV, the reference IFC4 migration, the spec) are
  separate files generated by real pipeline runs.

This benchmark package is itself published under CC BY 4.0; the upstream
attribution above is preserved with it.
