IfcCurveStyleFontPattern

Semantic definitions at the entity

Entity definition

NOTE Definition according to ISO/CD 10303-46:1992
A curve style font pattern is a pair of visible and invisible curve segment length measures in presentation area units.

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

HISTORY New entity in IFC2x2.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	VisibleSegmentLength	IfcLengthMeasure		The length of the visible segment in the pattern definition. NOTE For a visible segment representing a point, the value 0. should be assigned. IFC2x3 CHANGE The datatype has been changed to IfcLengthMeasure with upward compatibility for file-based exchange.	X
2	InvisibleSegmentLength	IfcPositiveLengthMeasure		The length of the invisible segment in the pattern definition.	X

Attribute

Type

Cardinality

Description

VisibleSegmentLength

IfcLengthMeasure

The length of the visible segment in the pattern definition.

NOTE For a visible segment representing a point, the value 0. should be assigned.

IFC2x3 CHANGE The datatype has been changed to IfcLengthMeasure with upward compatibility for file-based exchange.

InvisibleSegmentLength

IfcPositiveLengthMeasure

The length of the invisible segment in the pattern definition.

Formal Propositions

Rule	Description
VisibleLengthGreaterEqualZero	The value of a visible pattern length shall be equal or greater then zero.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Description	G
IfcPresentationItem
IfcCurveStyleFontPattern
1	VisibleSegmentLength	IfcLengthMeasure	The length of the visible segment in the pattern definition. NOTE For a visible segment representing a point, the value 0. should be assigned. IFC2x3 CHANGE The datatype has been changed to IfcLengthMeasure with upward compatibility for file-based exchange.	X
2	InvisibleSegmentLength	IfcPositiveLengthMeasure	The length of the invisible segment in the pattern definition.	X

Formal representations

XML Specification

 <xs:element name="IfcCurveStyleFontPattern" type="ifc:IfcCurveStyleFontPattern" substitutionGroup="ifc:IfcPresentationItem" nillable="true"/>

 <xs:complexType name="IfcCurveStyleFontPattern">

  <xs:complexContent>

   <xs:extension base="ifc:IfcPresentationItem">

    <xs:attribute name="VisibleSegmentLength" type="ifc:IfcLengthMeasure" use="optional"/>

    <xs:attribute name="InvisibleSegmentLength" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcCurveStyleFontPattern

 SUBTYPE OF (IfcPresentationItem);

  VisibleSegmentLength : IfcLengthMeasure;

  InvisibleSegmentLength : IfcPositiveLengthMeasure;

 WHERE

  VisibleLengthGreaterEqualZero : VisibleSegmentLength >= 0.;
END_ENTITY;

 EXPRESS-G diagram

	Linienstilsatz - Muster
	Curve Style Font Pattern