Semantic Web Languages and Standards

Published on 2012-07-048728 Views

Aidan Hogan

2nd ESWC Summer School, Kalamaki 2012

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Presentation

Semantic Web Languages and Standards (Primer)00:00

Semantic Web00:03

What Is The Semantic Web?00:23

The Semantic Web is Tim (et al.)’s Vision ?00:52

The Semantic Web is intelligent machines helping us make sense of the Web ?01:07

The Semantic Web is naming everything ?01:20

The Semantic Web is linking Web data ?01:41

The Semantic Web is breaking down the data silos / walls ?02:29

The Semantic Web is Web 3.0 ?03:15

The Semantic Web is a stack of technologies for interoperability? - 103:51

The Semantic Web is a stack of technologies for interoperability? - 204:52

The Semantic Web is a bunch of standards for interoperability?05:01

The Semantic Web is something very very bad and it must die (apparently) ?05:30

The Semantic Web is a buzzword ?05:38

The Semantic Web is… - 105:49

The Semantic Web is… - 205:51

…What Is The Semantic Web For?06:22

Web = Flood of information - 106:29

Web = Flood of information - 207:02

Web = Flood of information - 307:23

Web = Flood of information - 407:39

Web = Flood of information - 507:58

From signals …08:31

To binary …08:35

To characters (ASCII/Unicode) …08:37

To document markup (HTML) …08:40

To data markup …08:59

To arbitrary information exchange ???09:18

Arbitrary data/information exchange …09:47

Syntax to semantics / terms to entities10:55

…When Did The Semantic Web Begin?11:39

Started with the Web?12:54

Pre-dating Web …13:15

Modern Semantic Web …14:12

…So where is this semantic web now?16:04

Hidden within the Web?16:21

Linked Open Data cloud16:38

Open Government Data (US)17:02

Open Government Data (UK)17:32

Semantics in HCLS/Biomedical Domain17:55

Drupal 7 Core18:33

GoodRelations for Products - 119:17

GoodRelations for Products - 219:34

GoodRelations for Products - 320:02

FaceBook’s Open Graph Protocol - 120:13

FaceBook’s Open Graph Protocol - 220:43

schema.org20:54

BBC World Cup 2010 site21:38

qwiki.com22:11

Metaweb / Freebase23:55

Google’s Knowledge Graph24:16

Not there yet (but getting there…) - 126:05

Not there yet (but getting there…) - 226:12

Not there yet (but getting there…) - 326:18

It All Begins With Rdf …26:22

A brief history of RDF 26:40

What is RDF (not)?28:14

What is RDF?28:31

What are triples?28:42

RDF Triples: statements in slots of three29:06

Triples form a directed, labelled graph29:28

Why triples? Simplest fixed-arity model … - 129:58

Why triples? Simplest fixed-arity model … - 230:38

Naming in triples … avoid ambiguity30:40

Avoid ambiguities: use URIs (/IRIs)!34:03

Abbreviating URIs34:21

RDF Triples: literals in object position34:41

Simple Literals35:02

Language-tagged Literals35:04

Datatype Literals35:19

RDF Literals: summary36:46

RDF Triples: blank-nodes37:15

Blank Nodes37:39

Blank Nodes are existential (in theory)38:25

Summary of RDF Triples40:47

Triples are everywhere! - 141:38

Triples are everywhere! - 242:14

Triples are everywhere! - 342:28

Features of RDF: typing / classes43:20

Features of RDF: containers (aka. lists)43:37

Other features of RDF (not covered)45:59

Writing RDF triples down?46:37

RDF syntaxes / serialisation47:00

RDF syntaxes47:09

N-Triples47:26

Turtle (Terse RDF Triple Language)48:32

Turtle (Blank node abbreviation)49:45

Turtle (RDF collection / list abbreviation)52:47

Turtle (my favourite abbreviation)53:10

Notation3 (N3) … a quick note53:21

RDF/XML overview54:21

RDF/XML (…will not go into detail)56:08

RDFa overview01:00:28

RDFa (…will not go into detail)01:01:08

That’s Rdf … Next Up…01:01:36

RDFS and OWL!01:02:48

Features walkthrough…01:03:31

A Family-Relations OWL Ontology01:03:41

RDFS01:03:55

rdfs:subPropertyOf01:04:07

rdfs:subClassOf01:05:08

rdfs:domain 01:05:22

rdfs:range01:05:52

Recap RDFS01:06:06

OWL - 101:06:36

owl:equivalentProperty01:06:44

owl:inverseOf01:08:00

owl:SymmetricProperty01:08:19

owl:TransitiveProperty01:08:37

owl:propertyChainAxiom01:09:02

Recap OWL property axioms01:09:47

OWL - 201:10:38

owl:sameAs01:11:50

owl:FunctionalProperty01:15:29

owl:InverseFunctionalProperty01:16:50

Recap OWL equality axioms01:18:11

OWL - 301:18:32

owl:unionOf01:19:02

owl:intersectionOf (i)01:19:29

owl:intersectionOf (ii)01:20:04

owl:oneOf01:20:16

owl:disjointWith01:24:07

owl:allValuesFrom01:25:24

owl:someValuesFrom (i)01:25:47

owl:someValuesFrom (ii)01:26:03

Recap OWL class axioms01:28:41

OWL - 401:28:44

…some OWL features not covered:01:28:46

But what does it all mean?01:28:50

RDFS History01:28:54

RDF(S) Semantics01:28:56

RDF(S) Semantics: existential blank nodes01:29:02

RDFS Semantics: RDFS rules / reasoning01:29:09

OWL History01:29:18

OWL Semantics01:29:21

OWL Profiles01:30:55

That’S Rdfs/Owl … … Next Up…01:31:40