Implementation Agreements

Technical corregendum to the IFC schema that mitigate uncertainty by consensus agreement of vendors implementing IFC support and the Model Support Group

IA Title Date IA Description
CV-2x3-1002006 02 24Correct usage of IfcMaterialLayerSetUsage for IfcSlab
[modified 15-12-2006]
CV-2x3-1012006 02 24Requested support of IfcEllipse for profile definitions
CV-2x3-1022006 02 24No support of b-splines within current IFC implementations
CV-2x3-1032006 02 24Independent profile geometry for doors and windows
[modified 04-11-2011]
CV-2x3-1042006 02 24Number of doors and windows within one opening is restricted to max 1
CV-2x3-1052006 02 24Export of bounding box is no longer mandatory
CV-2x3-1062006 02 24Agreed use of geometric representation context and sub context
[modified 05-05-2006 and 06-07-2011]
CV-2x3-1072006 02 24Handling of complex opening shapes (reveals, vertical extrusions)
[modified 05-05-2006]
CV-2x3-1082006 02 24Revoke previous agreement on extending the opening thickness
CV-2x3-1092006 02 24Revoke the agreement to provide Pset_Draughting
CV-2x3-1102006 02 24Revoke the agreement on not allowing vertical clipping planes
[modified 06-07-2011]
CV-2x3-1112006 02 24No duplicated points within a polyloop or polyline
CV-2x3-1122006 02 24Support for CSG geometry is required on import
[modified 06-07-2011, 06-02-2012]
CV-2x3-1132006 02 24Support for annotation pattern for hatching is restricted to model hatches
[modified 05-05-2006]
CV-2x3-1142006 02 24Material presentation information for parametric doors and windows not supported
CV-2x3-1152006 02 24Matching imported styles (curve fonts, hatching patterns, text fonts, RGB colours) to system internal styles
CV-2x3-1162006 03 07No use of subtypes of IfcStyledItem for assigning presentation information
CV-2x3-1172006 04 13Use of the same parameterization for profiles in IFC2x2 and IFC2x3 based on center of bounding
CV-2x3-1182006 04 21Agreement to use PatternStart and PointOfReferenceHatchLine in IfcFillAreaStyleHatching
CV-2x3-1192006 05 05Geometry for decomposed elements shall either be given at the container or at the part level
[modified 20-05-2011]
CV-2x3-1202006 05 05Material information for decomposed elements shall only be given at the element part level
[modified 06-07-2011]
2006 05 05Decomposed elements shall have a maximum of 1 level decomposition depth
[withdrawn 07-10-2011]
CV-2x3-1222006 05 05Extrusion thickness of opening elements should be within reasonable boundaries
CV-2x3-1232006 05 05Opening elements shall be within the wall face or slab profile (not misused as arbitrary cuttings)
[modified 26-02-2008]
CV-2x3-1242006 05 05Non vertical walls shall not be exchanged as instances of IfcWallStandardCase
CV-2x3-1252006 05 05Agreements on the limited subset of hatching style entities and attributes to be supported
CV-2x3-1262006 05 05Agreements on the limited subset of text style entities and attributes to be supported
CV-2x3-1272006 05 05Agreements on the limited subset of surface style entities and attributes to be supported
CV-2x3-1282006 11 24Agreement on how to use material layer set and usage for wall types
CV-2x3-1292006 11 24Agreement on how to use CAD layer assignment and the support of layer with style information
CV-2x3-1302006 11 24Agreement on how to use and override curve style information
CV-2x3-1312006 11 24Agreement on how to use and override surface style information
CV-2x3-1322006 11 24Agreement on import of special characters in significant names (like layer, material, or property name)
CV-2x3-1332006 11 24Restrict the insertion point of doors and windows in regard to the opening
CV-2x3-1342007 03 13For a complex wall the opening has to be associated with the aggregate (the IfcWall) and not with the parts (the IfcBuildingElementPart's)
CV-2x3-1352007 03 13Assignment of surface color to surface models (dealing with the backface issue)
CV-2x3-1362007 03 13Agreement on exporting the construction type
CV-2x3-1372007 03 13Agreement on the export of profile names for section profiles in addition to geometric parameters
CV-2x3-1382007 05 23Agreement on providing a presentation layer for doors and windows based on parametric description
CV-2x3-1392007 05 23Agreement on an add-on to the coordination view to include base quantities
CV-2x3-1402007 05 23Agreement on an add-on to the coordination view to include space boundaries
CV-2x3-1412007 05 23Agreement on having maximum of one instance of IfcSite
CV-2x3-1422007 05 23Agreement on having at least one instance of IfcBuilding as part of the spatial structure
CV-2x3-1432007 05 23Agreement on having the containment tree and the relative placement tree identical for spatial elements
CV-2x3-1442008 02 27Agreement on roofs being aggregates and shall have at least one contained element and no own geometry
[withdrawn 06-02-2012]
CV-2x3-1452008 02 27Agreement on clipping of round walls to require compatible geometry for wall body and restricted clipping planes
CV-2x3-1462008 02 27Agreement on consistent export of shells by having each vertex defined only once and shared by edges
CV-2x3-1472008 02 27Agreement on single and double-sided faces in surface models to be determined by IfcSurfaceStyle
CV-2x3-1482008 02 27Agreement on exporting geographic data if available, including latitude, longitude, elevation, address and true north
[modified 13-07-2011]
CV-2x3-1492008 02 27Agreement to add support for certain types of IfcCovering to be added to the coordination view
CV-2x3-1502008 06 24Agreement on how to split an opening between two walls (e.g. in a staircase)
CV-2x3-1512008 06 24Agreement on how to differentiate space boundaries between first level and second level
CV-2x3-1522008 06 24Agreement that all spaces shall have a body shape representation
CV-2x3-1532008 06 24Agreement that virtual elements should/could be ignored on import
CV-2x3-1542008 06 24Agreement on the compression mechanism for ifcZIP
[modified 23-10-2008]
CV-2x3-1552008 06 24Agreement on implementation of first level space boundaries
CV-2x3-1562008 06 24Agreement on exporting CAD presentation layer for multi-layer walls
[modified 20-03-2011]
CV-2x3-1572008 10 23Agreement on a particular type of building element proxy to exchange provisions for voids
CV-2x3-1582010 09 01Agreement that element parts in element containers shall not be individually contained within the spatial structure
[modified 27-02-2013]
CV-2x3-1592010 09 01Agreement that openings that are subtracted from elements shall not be individually contained within the spatial structure
CV-2x3-1602010 09 01Agreement that element parts in element containers shall be positioned relative to the container
CV-2x3-1612010 09 01Agreement on applicable geometric items to be used for axis representation
CV-2x3-1622010 09 01Agreement on the valid value range for the angle in revolved area solids
CV-2x3-1632010 09 01Agreement on the minimum set of default units to be defined within the project context
CV-2x3-1642010 09 01Agreement on the correct use of shape representation types for elements and its features (openings, projections)
CV-2x3-1652010 09 23Agreement on how to export the profile name
CV-2x3-1662010 09 23Agreement to not use the deprecated IfcElectricHeaterType for electrical space heaters
[addition 10-04-2013 on always using IfcFlowTerminal as occurrence]
CV-2x3-1672011 05 01Agreement to assign style to all body shape representations
CV-2x3-1682011 09 01Agreement to use standard shape representation type names "Axis", "FootPrint" also for IfcStairFlight and IfcRampFlight
CV-2x3-1692011 09 01Agreement to restrict which independent elements can be contained in a building spatial structure
CV-2x3-1702011 10 24Requirement to provide a fall-back configuration to export b-rep instead of CSG shape representations
CV-2x3-1712011 10 24No shape representation identifier shall be used twice within the product representation of an element
CV-2x3-1722011 10 24Enable multiple mapped items as a shape representation of regular patterns
CV-2x3-1732011 10 24Aggregates shall have more than one part
CV-2x3-1742012 02 01Restrictions on the 'Axis' shape representation for IfcWallStandardCase
CV-2x3-1752012 09 24Agreement that all doors and windows shall have a body shape representation
CV-2x3-1762012 12 01Agreement on how to use IfcPort / IfcDistributionPort within the IFC2x3 extended coordination view
CV-2x3-1772013 01 01Agreement for definition of opening geometry either as IfcOpeningElement or as part of a CSG tree.
CV-2x3-1782013 07 01Agreement on using IfcRelConnectsElements for assigning IfcDoor / IfcWindow to building elements without IfcOpeningElement's.
CV-2x3-179- (Unassigned number)
CV-2x3-1802013 09 13Agreement on Color Priority in the Coordination View
CV-2x3-1812013 09 13Agreement on use of ParameterTakesPrecedence for doors and windows
CV-2x3-1822013 09 13Agreement to clarify the export of a Building Storey and its local placement 
CV-2x3-1832013 09 13Agreement to disallow duplication of Property Set Names within a single object or object type 
CV-4-0012013 09 13Agreement on export of explicit plan view geometry of IfcWindow and IfcDoor
CV-4-0022013 09 13Agreement on use of Local Relative Placement
CV-4-0032013 09 13Agreement on use of Local Relative Placement for profiles definitions
CV-4-0042014 03 14Agreement on use of naming for Objects versus Object Types
CV-4-0052014 03 14Agreement for the usage of MaterialLayerSetUsage for Elements without StandardCase definitions (proposed - in progress)
CV-4-0062014 03 14Agreement for the use of MaterialLayerSetUsage for Quantity Take-off (proposed - in progress)
Showing entries (filtered from total entries)

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