IfcClassificationNotation
Definition from buildingSMART International: An IfcClassificationNotation is a
notation used from published reference (which may be either publicly available
from a classification society or is published locally for the purposes of an
organization, project or other purpose).
HISTORY: New class in IFC
Release 1.5. It has changed in IFC Release 2x. Documentation corrections made
in IFC 2x Addendum 1
Use Definitions
A classification notation may be developed using various notation
facets. A facet is a part of the actual notation but which has a specific
meaning. For instance, it may be appropriate to classify an item by owning
actor (represented by A=Architect) and by an entry from a classification table
such as CI/SfB (represented by 210 for external wall). This gives a
classification as A210.
All classifications of an object that are contained within the IFC model
are made through the IfcClassificationNotation class. For a given
object, the IfcRelAssociatesClassification class makes the connection
between the IfcObject and the IfcClassificationNotation.
It is a requirement that a classification notation can only bring
together facets from the same classification system or source. Bringing
together notation facets from different sources within the same classification
notation is not allowed. However, multiple classifications can be applied to a
single object through the use of more than one instance of
IfcRelAssociatesClassification. In this way it is possible to define
multiple classification notations where each notation contains facets from a
single source.
EXPRESS specification:
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| ENTITY IfcClassificationNotation;
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Attribute definitions:
| NotationFacets
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Alphanumeric characters in defined groups from which the classification notation is derived.
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Inheritance graph
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| ENTITY IfcClassificationNotation;
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