# IFC Development Monthly Call - 19 November 2020 **URL:** \ **Category:** General Assembly (neé ISG) Meetings\ **Tags:** ifc5, meetings\ **Created:** [November 6, 2020, 3:42pm UTC](https://forums.buildingsmart.org/t/ifc-development-monthly-call-19-november-2020/3099 "2020-11-06T15:42:41Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![jwouellette](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/jwouellette/32/2140_2.png) [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\ **Post date:** [November 6, 2020, 3:42pm UTC](https://forums.buildingsmart.org/t/ifc-development-monthly-call-19-november-2020/3099/1 "2020-11-06T15:42:41Z")
Greetings buildingSMART Technical Community, The next meeting will be [19 November 2020, 14.00 GMT](https://www.timeanddate.com/worldclock/meetingdetails.html?year=2020&month=11&day=19&hour=14&min=0&sec=0&p1=179&p2=136&p3=37&p4=49&p5=771&p6=33&p7=248) # Topic: **Constraints and IFC** ## Topic Summary: How do we deal with Constraints on/in IFC? Should requirements be represented within or outside the IFC schema? Are ‘data’ requirements and ‘real’ requirements mainly similar or mainly different? This will include reviewing a generic view on requirements (and checks), experiences from mvdXML, the IFC Constraint model, RASE as a methodology, BuildingSync and Schematron, and regulatory checking… Presentations by: Nick Nisbet, AEC3 Matthias Weise, AEC3 Nicholas Long, NREL Ted Summer, Devetry Thomas Krijnen, AECGeeks There will be room for questions and discussions after the presentation. **The call will be 2 hour this week.** Community members are invited to offer presentations on the subject. Please submit your ideas in response to this Topic so we can coordinate. Also, reach out to [technical@buildingsmart.org](mailto:technical@buildingsmart.org) at least a couple days before. # IFC Development Monthly Call > Please join my meeting from your computer, tablet or smartphone. > **[https://global.gotomeeting.com/join/362688421](https://global.gotomeeting.com/join/362688421)** > > You can also dial in using your phone. > United States: +1 (312) 757-3119 > > Access Code: 362-688-421 > > More phone numbers > Australia: +61 2 8355 1038 > Austria: +43 7 2081 5337 > Belgium: +32 28 93 7002 > Canada: +1 (647) 497-9373 > Denmark: +45 32 72 03 69 > Finland: +358 923 17 0556 > France: +33 170 950 590 > Germany: +49 721 6059 6510 > Ireland: +353 15 295 146 > Italy: +39 0 230 57 81 80 > Netherlands: +31 202 251 001 > New Zealand: +64 9 913 2226 > Norway: +47 21 93 37 37 > Spain: +34 932 75 1230 > Sweden: +46 853 527 818 > Switzerland: +41 315 2081 00 > United Kingdom: +44 330 221 0097 > > New to GoToMeeting? Get the app now and be ready when your first meeting starts: > [GoTo](https://global.gotomeeting.com/install/362688421) As usual, the meeting will be recorded and a link posted for anyone to view later. If there are any questions, please let me know. ---
**Author:** ![vserge](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/vserge/32/661_2.png) [@vserge](https://forums.buildingsmart.org/u/vserge)\ **Post date:** [November 8, 2020, 8:25pm UTC](https://forums.buildingsmart.org/t/ifc-development-monthly-call-19-november-2020/3099/2 "2020-11-08T20:25:36Z")
I consider it appropriate to create an abstract class “Constrains” and two objects “Regulatory and technical requirements” and “Business requirements” within the framework of the main IFC scheme. This will allow you to compare the General - state regulatory requirements and functional Customer’s requirements with the elements of the information model. This will also allow you to define rules for checking for compliance with these requirements. An additional argument in favor of including these elements in the IFC scheme is the possibility of using the information model as a method for long-term storage of information. A model containing such data can be processed in 50 years without additional links to external sources. ---
**Author:** ![jwouellette](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/jwouellette/32/2140_2.png) [@jwouellette](https://forums.buildingsmart.org/u/jwouellette)\ **Post date:** [November 20, 2020, 2:02am UTC](https://forums.buildingsmart.org/t/ifc-development-monthly-call-19-november-2020/3099/3 "2020-11-20T02:02:13Z")
Recording for this session can be found here: [https://app.box.com/s/of3o7ys5vv8t41g83xmirs7yg1mvzgaw](https://app.box.com/s/of3o7ys5vv8t41g83xmirs7yg1mvzgaw) **Links from chat** Here is a link to the Schematron project’s github repo that includes multiple schematron instances: [https://github.com/buildingsync/testsuite](https://github.com/buildingsync/testsuite) And an example instance: [https://github.com/BuildingSync/TestSuite/blob/develop/schematron/v2.2.0/v2-2-0\_L200\_Audit.sch](https://github.com/BuildingSync/TestSuite/blob/develop/schematron/v2.2.0/v2-2-0_L200_Audit.sch) Per Nicholas Long: We use this in what we call the BuildingSync Use Case Selection tool which is a web application to validate/verify that the instance of BuildingSync meets the required use case. This example is an ASHRAE Std 211 Level 2 energy audit. ---
**Author:** ![Benzcly](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/benzcly/32/671_2.png) [@Benzcly](https://forums.buildingsmart.org/u/Benzcly)\ **Post date:** [November 20, 2020, 12:00pm UTC](https://forums.buildingsmart.org/t/ifc-development-monthly-call-19-november-2020/3099/4 "2020-11-20T12:00:38Z")
Are the slides of the meeting going to be shared?