IfcTimeSeries

Item	SPF	XML	Change	Description
IFC2x3 to IFC4 4.0.0.0
IfcTimeSeries			MOVED	Schema changed from IFCTIMESERIESRESOURCE to IFCDATETIMERESOURCE.

Semantic definitions at the entity

Entity definition

A time series is a set of a time-stamped data entries. It allows a natural association of data collected over intervals of time. Time series can be regular or irregular. In regular time series data arrive predictably at predefined intervals. In irregular time series some or all time stamps do not follow a repetitive pattern and unpredictable bursts of data may arrive at unspecified points in time.

The modeling of buildings and their performance involves data that are generated and recorded over a period of time. Such data cover a large spectrum, from weather data to schedules of all kinds to status measurements to reporting to everything else that has a time related aspect. Their correct placement in time is essential for their proper understanding and use, and the IfcTimeSeries subtypes provide the appropriate data structures to accommodate these types of data.

HISTORY New entity in IFC2x2.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	Name	IfcLabel		An unique name for the time series.	X
2	Description	IfcText	?	A text description of the data that the series represents.	X
3	StartTime	IfcDateTime		The start time of a time series.	X
4	EndTime	IfcDateTime		The end time of a time series.	X
5	TimeSeriesDataType	IfcTimeSeriesDataTypeEnum		The time series data type.	X
6	DataOrigin	IfcDataOriginEnum		The origin of a time series data.	X
7	UserDefinedDataOrigin	IfcLabel	?	Value of the data origin if DataOrigin attribute is USERDEFINED.	X
8	Unit	IfcUnit	?	The unit to be assigned to all values within the time series. Note that mixing units is not allowed. If the value is not given, the global unit for the type of IfcValue, as defined at IfcProject.UnitsInContext is used.	X
	HasExternalReference	IfcExternalReferenceRelationship @RelatedResourceObjects	S[1:?]	Reference to an external reference, e.g. library, classification, or document information, that is associated to the IfcTimeSeries. IFC4 CHANGE New inverse attribute.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcTimeSeries
1	Name	IfcLabel		An unique name for the time series.	X
2	Description	IfcText	?	A text description of the data that the series represents.	X
3	StartTime	IfcDateTime		The start time of a time series.	X
4	EndTime	IfcDateTime		The end time of a time series.	X
5	TimeSeriesDataType	IfcTimeSeriesDataTypeEnum		The time series data type.	X
6	DataOrigin	IfcDataOriginEnum		The origin of a time series data.	X
7	UserDefinedDataOrigin	IfcLabel	?	Value of the data origin if DataOrigin attribute is USERDEFINED.	X
8	Unit	IfcUnit	?	The unit to be assigned to all values within the time series. Note that mixing units is not allowed. If the value is not given, the global unit for the type of IfcValue, as defined at IfcProject.UnitsInContext is used.	X
	HasExternalReference	IfcExternalReferenceRelationship @RelatedResourceObjects	S[1:?]	Reference to an external reference, e.g. library, classification, or document information, that is associated to the IfcTimeSeries. IFC4 CHANGE New inverse attribute.	X

Formal representations

XML Specification

 <xs:element name="IfcTimeSeries" type="ifc:IfcTimeSeries" abstract="true" substitutionGroup="ifc:Entity" nillable="true"/>

 <xs:complexType name="IfcTimeSeries" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:Entity">

    <xs:sequence>

     <xs:element name="Unit" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:group ref="ifc:IfcUnit"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="Name" type="ifc:IfcLabel" use="optional"/>

    <xs:attribute name="Description" type="ifc:IfcText" use="optional"/>

    <xs:attribute name="StartTime" type="ifc:IfcDateTime" use="optional"/>

    <xs:attribute name="EndTime" type="ifc:IfcDateTime" use="optional"/>

    <xs:attribute name="TimeSeriesDataType" type="ifc:IfcTimeSeriesDataTypeEnum" use="optional"/>

    <xs:attribute name="DataOrigin" type="ifc:IfcDataOriginEnum" use="optional"/>

    <xs:attribute name="UserDefinedDataOrigin" type="ifc:IfcLabel" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcTimeSeries

 ABSTRACT SUPERTYPE OF(ONEOF(IfcIrregularTimeSeries, IfcRegularTimeSeries));

  Name : IfcLabel;

  Description : OPTIONAL IfcText;

  StartTime : IfcDateTime;

  EndTime : IfcDateTime;

  TimeSeriesDataType : IfcTimeSeriesDataTypeEnum;

  DataOrigin : IfcDataOriginEnum;

  UserDefinedDataOrigin : OPTIONAL IfcLabel;

  Unit : OPTIONAL IfcUnit;

 INVERSE

  HasExternalReference : SET [1:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects;

END_ENTITY;

 EXPRESS-G diagram

	Serie mit Zeitabständen
	Time Series
	Séries temporelles