RDF Reference

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# RDF Reference

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## The RDF Namespaces

The RDF namespace (xmlns:rdf) is: http://www.w3.org/1999/02/22-rdf-syntax-ns#

The RDFS namespace (xmlns:rdfs ) is: http://www.w3.org/2000/01/rdf-schema#

## The RDF Extension and MIME Type

The recommended file extension for RDF files is .rdf. However, the extension .xml is often used to provide compatibility with old xml parsers.

The MIME type should be "application/rdf+xml".

## RDFS / RDF Classes

Element | Class of | Subclass of
--- | --- | ---
rdfs:Class | All classes |
rdfs:Datatype | Data types | Class
rdfs:Resource | All resources | Class
rdfs:Container | Containers | Resource
rdfs:Literal | Literal values (text and numbers) | Resource
rdf:List | Lists | Resource
rdf:Property | Properties | Resource
rdf:Statement | Statements | Resource
rdf:Alt | Containers of alternatives | Container
rdf:Bag | Unordered containers | Container
rdf:Seq | Ordered containers | Container
rdfs:ContainerMembershipProperty | Container membership properties | Property
rdf:XMLLiteral | XML literal values | Literal

## RDFS / RDF Properties

Element | Domain | Range | Description
--- | --- | --- | ---
rdfs:domain | Property | Class | The domain of the resource
rdfs:range | Property | Class | The range of the resource
rdfs:subPropertyOf | Property | Property | The property is a sub property of a property
rdfs:subClassOf | Class | Class | The resource is a subclass of a class
rdfs:comment | Resource | Literal | The human readable description of the resource
rdfs:label | Resource | Literal | The human readable label (name) of the resource
rdfs:isDefinedBy | Resource | Resource | The definition of the resource
rdfs:seeAlso | Resource | Resource | The additional information about the resource
rdfs:member | Resource | Resource | The member of the resource
rdf:first | List | Resource |
rdf:rest | List | List |
rdf:subject | Statement | Resource | The subject of the resource in an RDF Statement
rdf:predicate | Statement | Resource | The predicate of the resource in an RDF Statement
rdf:object | Statement | Resource | The object of the resource in an RDF Statement
rdf:value | Resource | Resource | The property used for values
rdf:type | Resource | Class | The resource is an instance of a class

## RDF Attributes

Element | Domain | Range | Description
--- | --- | --- | ---
rdf:about |  |  | Defines the resource being described
rdf:Description |  |  | Container for the description of a resource
rdf:resource |  |  | Defines a resource to identify a property
rdf:datatype |  |  | Defines the data type of an element
rdf:ID |  |  | Defines the ID of an element
rdf:li |  |  | Defines a list
rdf:_n |  |  | Defines a node
rdf:nodeID |  |  | Defines the ID of an element node
rdf:parseType |  |  | Defines how an element should be parsed
rdf:RDF |  |  | The root of an RDF document
xml:base |  |  | Defines the XML base
xml:lang |  |  | Defines the language of the element content
rdf:aboutEach |  |  | (removed)
rdf:aboutEachPrefix |  |  | (removed)
rdf:bagID |  |  | (removed)

Elements described as (removed) are removed from the latest RDF standard.

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