IfcCurveInterpolationEnum

BACnet MVD

#### IfcCurveInterpolationEnum

Natural language names

| Curve Interpolation Enum

Change log

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

##### Semantic definitions at the type

Type definition

IfcCurveInterpolationEnum specifies the possible methods for the interpolation of property values given as a curve.

> HISTORY New type in IFC4.

Enumeration definition

Constant | Description
--- | ---
LINEAR | Indicates that values between the defined values are to be found by linear interpolation.
LOG_LINEAR | Indicates that values between the defined values are to be found by linear interpolation of the natural logarithm (base e) of the values.
LOG_LOG | Indicates that values between the defined values are to be found by linear interpolation of the Briggs' logarithm (base 10) of the values.
NOTDEFINED | No interpolation information is provided

##### Formal representations

XML Specification
`<xs:simpleType name="IfcCurveInterpolationEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="linear"/>
<xs:enumeration value="log_linear"/>
<xs:enumeration value="log_log"/>
<xs:enumeration value="notdefined"/>
</xs:restriction>
</xs:simpleType>
`
EXPRESS Specification
`TYPE IfcCurveInterpolationEnum = ENUMERATION OF (
LINEAR,
LOG_LINEAR,
LOG_LOG,
NOTDEFINED);
END_TYPE;

EXPRESS-G diagram

`

References: IfcPropertyTableValue

Link to this page