IfcURIReference

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcURIReference			ADDED

Semantic definitions at the type

Type definition

The IfcURIReference provides for identifying a Uniform Resource Identifier (URI). A URI can be classified as a locator or a name or both, that is it may comprise a Uniform Resource Locator (URL) and/or a Uniform Resource Name (URN).

A Uniform Resource Locator, URL, is a string conforming to a standardized format, which refers to a resource on the internet (such as a document or an image) by its location.
A Uniform Resource Name, URN, is intended to serve as persistent, location-independent resource identifier and is designed to make it easy to map other namespaces (that share the properties of URNs) into URN-space.

NOTE See RFC 3986 for definition of Uniform Resource Identifier.

HISTORY New defined datatype in IFC4.

Formal representations

XSD Specification

 <xs:simpleType name="IfcURIReference">

  <xs:restriction base="xs:normalizedString"/>

 </xs:simpleType>

 <xs:element name="IfcURIReference-wrapper" nillable="true">

  <xs:complexType>

   <xs:simpleContent>

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

     <xs:attributeGroup ref="ifc:instanceAttributes"/>

    </xs:extension>

   </xs:simpleContent>

  </xs:complexType>

 </xs:element>

EXPRESS Specification


TYPE IfcURIReference = STRING;
END_TYPE;


 EXPRESS-G diagram

	URIReference
	Référence à une adresse Web