What does the Acronym IFC stand for?
What is the current official version?
Industry Foundation Classes
IFC 4.3
What are 3 use cases of IFC?
Data Handover to client
Coordination of disciplines
Model handover to following design phase
What are Geometry only exchange formats? What are their limitations
STL, OBJ
No modification possible
no semantics => Limited use for downstream applications (quantity take-off)
What is BIM Modeling?
Catalog of parametric object types
Objects have geometric and non-geometric attributes
What can IFC describe?
What is a class?
Template that defines which attributes and relationships an object of this type has
A BIM model is an …
Object-orient model
What is the difference between a Schema and an Instance? What is the data format of each in IFC?
A schema is a description of a data model like the IFC Data Model in EXPRESS
An Instance is an individual object created based on the definition of a schema (concrete building model) in STEP 21 File
How does the IFC Data Model look like? (Top 3 classes)
What is IFC based on?
What is the data modeling language?
EXPRESS
Standard for the Exchange of Product model data (STEP)
How does EXPRESS look like
How does an objectified IFC relationship look like (Wall to Window)?
How does the IFC graph look from the top?
Do you have to assign IFC Elements to a story?
How does an IfcRelSpaceBoundary look like?
What is it important for?
How is the relationship of semantics and geometry in IFC? What does it allow?
What are 4 different geometry representations in IFC?
Name 3 kinds of IFC relationships
- IfcRelAggregates
- IfcRelContainedInSpatialStructure
-IfcRelSpaceBoundary
How do I get all walls from an IFC model in c#?
What is an IfcBuildingElementProxy?
The IfcBuildingElementProxy is a proxy definition that provides the same functionality as any subtype of IfcBuiltElement, but without having a predefined meaning of the special type of building element it represents.
=> Used for elements that are not yet defined in IFC.
What is a Property Set?
How is IFC stored in a file?
Each object is stored as a data record (one line) and has a number
A record contains all attributes
Each object (record) has a unique ID
Relationships between objects are realized via record number and not via ID
What is an alternativ to IFC STEP P21?
What are Pros/Cons?
What two approaches do IFC readers use? What are the differences?
What does IFC provide? 4 bullets.
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