IfcStructuralCurveActivityTypeEnum

BACnet MVD

#### IfcStructuralCurveActivityTypeEnum

Natural language names

| Structural Curve Activity Type Enum

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcStructuralCurveActivityTypeEnum |  |  | ADDED |

##### Semantic definitions at the type

Type definition

This enumeration defines the distribution of load values in a curve action or reaction.

> HISTORY New enumeration in IFC4

Enumeration definition

Constant | Description
--- | ---
CONST | The load has a constant value over its entire extent.
LINEAR | The load value is linearly distributed over the load's extent.
POLYGONAL | The load consists of several consecutive linear sections.
EQUIDISTANT | The load consists of n consecutive sections of same length and is specified by n+1 load samples. The interpolation type over the segments is not defined by this distribution type but may be qualified in IfcObject.ObjectType based on additional agreements.
SINUS | The load value is distributed as a sinus half wave.
PARABOLA | The load value is distributed as a half wave described by a symmetric quadratic parabola.
DISCRETE | The load is specified as a series of discrete load points.
USERDEFINED | The load distribution is user-defined.
NOTDEFINED | The load distribution is undefined.

##### Formal representations

XML Specification
`<xs:simpleType name="IfcStructuralCurveActivityTypeEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="const"/>
<xs:enumeration value="linear"/>
<xs:enumeration value="polygonal"/>
<xs:enumeration value="equidistant"/>
<xs:enumeration value="sinus"/>
<xs:enumeration value="parabola"/>
<xs:enumeration value="discrete"/>
<xs:enumeration value="userdefined"/>
<xs:enumeration value="notdefined"/>
</xs:restriction>
</xs:simpleType>
`
EXPRESS Specification
`TYPE IfcStructuralCurveActivityTypeEnum = ENUMERATION OF (
CONST,
LINEAR,
POLYGONAL,
EQUIDISTANT,
SINUS,
PARABOLA,
DISCRETE,
USERDEFINED,
NOTDEFINED);
END_TYPE;

EXPRESS-G diagram

`

References: IfcStructuralCurveAction IfcStructuralCurveReaction

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