Difference: ScottThompson (1 vs. 2)

_Meeting Minutes_

June 17, 2007 - Getting started (Scott, Rachel) * scope of project * submit user account from for eb.cs.ubc.ca * setup db lab access (ICICS X415) * setup meeting with jiemin, others

June 17, 2007 - Intro & current status(Scott, Jiemin) * Revit: ** Currently export to ODBC for main data source ** no cartesian co-ordinates for entities, (aka location information) ** Other Possible sources: * DWF (there is an api: DWF Toolkit, presently unexplored) * gbXML (this apparently only provides a partial export, and does not export all entities; for example, it might export walls, but not cielings) * "Embrace, Extend & Extinguish" * DWG - no location info (not examined in-depth; how is DWG diff from DWF?) ** Final format for data source: we won't have single format that combines all data. info will be provided on a query basis from multiple formats. * Some discussion on procedures for using software.

Comments: * AutoDesk has been known to follow microsoft's business approach, to standards (see: "Embrace, Extend & Extinguish"). It's possible that autodesk has made a business decision to intentionally omit key (location) information in the data export in order to cripple a potentially threatening format.

June 25, 2007 (Scott, Rachel, Brandon, Madnav, Jiemin, Sheryl)

Approaches: * Ji - Given design, how do we query the data? * Ma - Given design, consider actions - identify what info we need. * Ma - need prototyping info, etc

Slides: * formalize conditions for design model * "object based feature model" OBFM * Sh: IFC is a feture model * Ra: db people talk about "schemas" * objects & implicit design considerations (id beams and wall intersections) * how to populate 3D model * query 3D model * research framework (picture: domain knowledge -> generic feature templates -> instaniated models <-> query <-> 3D product model -> (feedback to generic feature template) * Q: what level of detail is in the templates? * Examples & Query Types ** alignment of supporting columns ** Ra: where to we define what it means to be aligned? A: generic feature template ** Sh: questions are pre-selected (aka pre-defined) * eg. are 2 components similar? what is the clear-span size? what is column spacing? are there patterns? ** Sh: terms like "moderate variation" need to be explicit ** eg. groupings of similar components ** eg. contractor reasoning about what is relevant ** eg. wall penetration - what? where? how many? properties of walls/ducts? * IFC relations ** Parent-class relationships, etc ** attributes of components, pair, etc * Penetration of walls is implicit ** Q: how to find implicit relationships? * sh: IFS is the industry standard ** rich on design, good architecturally ** undeveloped in building systems ** Q: product support? ** different models? * Ma: what db structure do products (revit) use? * Sh: need to document what info available from where * Ra: the research is in the methodology used to create the model * Sh: archiCAD has better IFC integration * Q: what is the market share of various CAD apps * sh: there is a paper on Revit export/re-import, and how it is lossy

Next meeting: 2 weeks later, july 10. 3:00

Action Items: * Ma: put slides on wiki * Ji, Sc: location data extraction * Ji: document the export sources and what info is exported * Ma: document data required for query * Ji: Share CAD models

Next steps: a) simple queries b) advanced, composidte, 3D queries c) "derived" information

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