RDF 文件的推荐扩展名是 *.rdf。不过，*.xml 常用于提供对老式 XML 解析器的兼容性。
已注册的 MIME 类型是 "application/rdf+xml"。
| 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 |
| 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 |
| 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) |