IFC 4.3.x development

8.12.3.25 IfcPreDefinedTextFont

8.12.3.25.1 Semantic definitions at the entity

The pre defined text font determines those qualified names which can be used for fonts that are in scope of the current data exchange specification (in contrary to externally defined text fonts). There are two choices:

  • IfcDraughtingPreDefinedTextFont for definitions from ISO/IS 10303-46:1994 for (old) vector based and monospace text.
  • IfcTextStyleFontModel for definitions from Cascading Style Sheets, level 1{ target="_blank"}, W3C Recommendation 17 Dec 1996, revised 11 Jan 1999, CSS1, for all true type text. The use of the CSS1 definitions is the preferred way to represent text fonts.

NOTE  Corresponding ISO 10303 name: pre_defined_text_font. Please refer to ISO/IS 10303-46:1994, p. 138 for the final definition of the formal standard.

HISTORY  New entity in IFC2x2.

IFC2x3 CHANGE  The IfcTextStyleFontModel has been added as new subtype.

#Attribute Type Description
IfcPresentationItem
IfcPreDefinedItem
1Name IfcLabelThe string by which the pre defined item is identified. Allowable values for the string are declared at the level of subtypes.

8.12.3.25.1 Entity inheritance

dot_inheritance IfcTextStyleFontModel IfcTextStyleFontModel IfcPreDefinedTextFont IfcPreDefinedTextFont IfcTextStyleFontModel->IfcPreDefinedTextFont IfcPreDefinedItem IfcPreDefinedItem IfcPreDefinedTextFont->IfcPreDefinedItem IfcPreDefinedColour IfcPreDefinedColour IfcPreDefinedColour->IfcPreDefinedItem IfcPresentationItem IfcPresentationItem IfcPreDefinedItem->IfcPresentationItem IfcPreDefinedCurveFont IfcPreDefinedCurveFont IfcPreDefinedCurveFont->IfcPreDefinedItem IfcPresentationItem_children 16 more... IfcPresentationItem_children->IfcPresentationItem

8.12.3.25.2 Formal representations

ENTITY IfcPreDefinedTextFont
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcTextStyleFontModel))
 SUBTYPE OF (IfcPreDefinedItem);
END_ENTITY;