1. RDF 1.1 Concepts and Abstract Syntax
Yanan Zhang
2018/12/3

2. contents RDF current status
Introduction to RDF 1.1 Concepts and Abstract Syntax
Changes from RDF 2004 to this version
2018/12/3

3. RDF current status
RDF Model and Syntax (1999 Recommendation) and RDF Schema (2000 Candidate Recommendation).
…….
W3C Recommendation 10 February 2004
RDF Concepts and Abstract Syntax
RDF Semantics
RDF Primer
RDF Vocabulary Description Language 1.0 :RDF Schema
RDF/XML Syntax Specification
RDF Test Cases
Group notes
Microdata to RDF
RDF Interfaces
RDF 1.1 Concepts and Abstract Syntax( )
2018/12/3

4. The Resource Description Framework (RDF)
is a framework for representing information in the Web.
has an abstract syntax that reflects a simple graph-based data model, and formal semantics.
that allows data to be shared and reused across application, enterprise, and community boundaries.
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5. Introduction to RDF 1.1 Concepts and Abstract Syntax
 Graph-based Data Model
RDF/XML
2018/12/3
Concepts:
Triples
(subject , predicate , object)
Nodes:
IRIs
blank nodes
literals

6. IRI (Internationalized Resource Identifier)
IRIs are a generalization of URIs.
IRI:Universal Character Set (Unicode/ISO 10646).
URI: a subset of the ASCII character set
As globally unique identifiers that describes resources(its referent), and as starting points for RESTful interaction with these resources.
2018/12/3

7. RDF Vocabularies and Namespace IRIs
a collection of IRIs with clearly established referents intended for use in RDF graphs.
eg. classes such as exterms:Tent,
properties such as exterms:model, exterms:weightInKg, and exterms:packedSize 
RDF Vocabulary Description Language : RDF Schema
rdfs:Class rdfs:subClassOf rdf:type rdf:Property rdfs:domain, rdfs:range, and rdfs:subPropertyOf
The IRIs in an RDF vocabulary often share a common substring known as a namespace IRI.
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8. blank node
something with the given relationships exists, without explicitly naming it.
Replacing blank nodes with IRIs, use a well-known IRI with the registered name genid.
2018/12/3

9. literal A literal in an RDF graph consists of:
a lexical form being a Unicode string,
a datatype IRI being an IRI that establishes the literal value.
e.g. "27"^^ Schema#integer
" "^^ Schema#date
A language-tagged string is any literal whose datatype IRI is equal to
simple literals, datatype IRI
In earlier versions of RDF
Plain literals
Typed literals 
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10. Datatypes The rdf:XMLLiteral Datatype The rdf:HTML Datatype
xsd:boolean
lexical space
lexical-to-value mapping 
The XML Schema Built-in Datatypes
RDF-compatible XSD types, where xxx is the name of a datatype.
Added xsd:duration , xsd:dayTimeDuration, xsd:yearMonthDuration and xsd:dateTimeStamp
The rdf:XMLLiteral Datatype
The rdf:HTML Datatype
2018/12/3

11. Changes from RDF 2004 to this version
Introduced a datatype for language-tagged strings, and one for HTML fragments
Modified the lexical space and value space of the rdf:XMLLiteral datatype
Updated the list of RDF-compatible XSD types to reflect XML Schema 1.1
a section on skolemization of blank nodes
Add a note that explains that #x0-#x1F are no longer allowed in simple literals
Changed “RDF URI Reference” to “IRI”
Renamed “graph equivalence” to “graph isomorphism”
many updated references to other specifications
Added a Conformance section
2018/12/3

12. Thanks!
2018/12/3