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IfcDraughtingPreDefinedColour

Definition from IAI: The draughting pre defined colour is a pre defined colour for the purpose to identify a colour by name. Allowable names are:

NOTE  The IfcDraughtingPreDefinedColour is an entity that had been adopted from ISO 10303, Industrial automation systems and integration—Product data representation and exchange, Part 202: Application protocol: Associative draughting.

The following table states the RGB values associated with the names given by the IfcDraughtingPreDefinedColour.

Colour name Red Green Blue
black 0 0 0
red 1.0 0 0
green 0 1.0 0
blue 0 0 1.0
yellow 1.0 1.0 0
magenta 1.0 0 1.0
cyan 0 1.0 1.0
white 1.0 1.0 1.0
NOTE  Corresponding STEP name: draughting_pre_defined_colour. Please refer to ISO/IS 10303-202:1994 page 194 for the final definition of the formal standard.
HISTORY  New entity in Release IFC2x Edition 2.

EXPRESS specification:

ENTITY IfcDraughtingPreDefinedColour
SUBTYPE OF ( IfcPreDefinedColour);
WHERE
WR31  :  SELF\IfcPreDefinedItem.Name IN ['black','red','green','blue','yellow', 'magenta','cyan','white','by layer'];
END_ENTITY;

Formal Propositions:

WR31  :  The inherited name for pre defined items shall only have the value of one of the following words.

Inheritance graph

ENTITY IfcDraughtingPreDefinedColour;
ENTITY IfcPreDefinedItem;
Name  :  IfcLabel;
ENTITY IfcPreDefinedColour;
ENTITY IfcDraughtingPreDefinedColour;
END_ENTITY;