Geographisches Objekt - Typ | |
Geographic Element Type | |
Type d'élément géographique |
Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
---|---|---|---|---|
IfcGeographicElementType | ADDED |
An IfcGeographicElementType is used to define an element specification of a geographic element (i.e. the specific product information, that is common to all occurrences of that product type). Geographic element types include for different types of element that may be used to represent information within a geographical landscape external to a building. Within the world of geographic information they are referred to generally as 'features'. IfcGeographicElementType's include:
The specification of the specific types are given by the inherited attribute IfcElementType.ElementType given as an IfcLabel.
Geographic element types are frequently identified in feature catalogs that are produced for particular purposes. The IfcGeographicElementType entity enables the continued use of existing feature catalogs through capture of their identity and attributes.
Information from feature catalogs might be captured in various ways:
NOTE This is due to the range of choices of element type thyat are available and their expression in different languages. It is not considered possible to create a reasonably full list of types within an enumeration. It is suggested that selection of the relevant type be drawn from an available 'feature catalog'.
HISTORY New entity in IFC4.
# | Attribute | Type | Cardinality | Description | B |
---|---|---|---|---|---|
10 | PredefinedType | IfcGeographicElementTypeEnum | [1:1] | Predefined types to define the particular type of the geographic element. There may be property set definitions available for each predefined type. | X |
Rule | Description |
---|---|
CorrectPredefinedType | The inherited attribute ElementType shall be provided, if the PredefinedType is set to USERDEFINED. |
# | Attribute | Type | Cardinality | Description | B |
---|---|---|---|---|---|
IfcRoot | |||||
1 | GlobalId | IfcGloballyUniqueId | [1:1] | Assignment of a globally unique identifier within the entire software world. | X |
2 | OwnerHistory | IfcOwnerHistory | [0:1] |
Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,
NOTE only the last modification in stored - either as addition, deletion or modification. | X |
3 | Name | IfcLabel | [0:1] | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X |
4 | Description | IfcText | [0:1] | Optional description, provided for exchanging informative comments. | X |
IfcObjectDefinition | |||||
HasAssignments | IfcRelAssigns @RelatedObjects | S[0:?] | Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups. | X | |
Nests | IfcRelNests @RelatedObjects | S[0:1] | References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only). | ||
IsNestedBy | IfcRelNests @RelatingObject | S[0:?] | References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types). | X | |
HasContext | IfcRelDeclares @RelatedDefinitions | S[0:1] | References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object. | ||
IsDecomposedBy | IfcRelAggregates @RelatingObject | S[0:?] | References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts). | X | |
Decomposes | IfcRelAggregates @RelatedObjects | S[0:1] | References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only). | X | |
HasAssociations | IfcRelAssociates @RelatedObjects | S[0:?] | Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification. | X | |
IfcTypeObject | |||||
5 | ApplicableOccurrence | - | This attribute is out of scope for this model view definition and shall not be set. | ||
6 | HasPropertySets | IfcPropertySetDefinition | S[1:?] |
Set | X |
Types | IfcRelDefinesByType @RelatingType | S[0:1] | Reference to the relationship IfcRelDefinedByType and thus to those occurrence objects, which are defined by this type. | ||
IfcTypeProduct | |||||
7 | RepresentationMaps | IfcRepresentationMap | ~L[1:?] | List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given. | X |
8 | Tag | - | This attribute is out of scope for this model view definition and shall not be set. | ||
ReferencedBy | IfcRelAssignsToProduct @RelatingProduct | S[0:?] | Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product type. | ||
IfcElementType | |||||
9 | ElementType | - | This attribute is out of scope for this model view definition and shall not be set. | ||
IfcGeographicElementType | |||||
10 | PredefinedType | IfcGeographicElementTypeEnum | [1:1] | Predefined types to define the particular type of the geographic element. There may be property set definitions available for each predefined type. | X |
# | Concept | Model View |
---|---|---|
IfcRoot | ||
Software Identity | Bridge View | |
User Identity | Bridge View | |
Object Ownership | Bridge View | |
IfcTypeObject | ||
Property Sets for Types | Bridge View | |
IfcGeographicElementType |
<xs:element name="IfcGeographicElementType" type="ifc:IfcGeographicElementType" substitutionGroup="ifc:IfcElementType" nillable="true"/>
<xs:complexType name="IfcGeographicElementType">
<xs:complexContent>
<xs:extension base="ifc:IfcElementType">
<xs:attribute name="PredefinedType" type="ifc:IfcGeographicElementTypeEnum" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcGeographicElementType
SUBTYPE OF (IfcElementType);
PredefinedType : IfcGeographicElementTypeEnum;
WHERE
CorrectPredefinedType : (PredefinedType <> IfcGeographicElementTypeEnum.USERDEFINED) OR
((PredefinedType = IfcGeographicElementTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;