This presentation on Semantic Web covers what is Semantic Web, the building blocks of semantic web and a brief overview n RDF, SPARQL, Ontologies and OWL.

1. -DARSHINI PARIKH
(TechKnowXpress)

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WHAT IS
SEMANTIC
WEB?
The Semantic Web is an extension of the Web
through standards by theWorld WideWeb
Consortium (W3C)

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ADVANTAGES
OFSEMANTIC
WEBOVER
TRADITIONAL
WEB
Improve the
understandability
and interpretability
of data for
processing by
machines
Enables inference
of new knowledge
from existing
information
Integration of
heterogeneous
data

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SEMANTIC
WEB
TECHNOLOGY
STACK

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BUILDING
BLOCKSOF
SEMANTIC
WEB
RDF –
Resource
Description
Framework
ONTOLOGIES
SPARQL

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RESOURCE
DESCRIPTION
FRAMEWORK
(RDF)
Standard model for
data interchange on
theWeb.
Facilitates data
merging even if the
underlying schemas
differ.
Supports the
evolution of
schemas over time
without requiring all
the data consumers
to be changed.

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RESOURCE
DESCRIPTION
FRAMEWORK
(RDF) (conti…)
RDF extends the
linking structure of the
Web to use URIs to
name the relationship
between things as well
as the two ends of the
link.
Allows structured and
semi-structured data
to be mixed, exposed,
and shared across
different applications.
RDFTriple:
Rdf: subject.
Rdf: predicate.
Rdf: object.

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RESOURCE
DESCRIPTION
FRAMEWORK
SCHEMA
(RDFS)
RDFS is a set of classes
with certain properties
using the RDF extensible
knowledge
representation data
model, providing basic
elements for the
description of ontologies

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ONTOLOGIES
An ontology is a formal
specification of a shared
conceptualization

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TYPESOF
ONTOLOGIES DOMAIN
ONTOLOGY
TASK
ONTOLOGY
APPLICATION
ONTOLOGY
TOP LEVEL
ONTOLOGY
The ontology
which describes
very general
concepts across all
knowledge
domains is called
top level ontology

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TYPESOF
ONTOLOGIES
(conti…)
DOMAIN
ONTOLOGY
TASK
ONTOLOGY
APPLICATION
ONTOLOGY
TOP LEVEL
ONTOLOGY
The ontology which
provides a
specification or
detailed description
of elements and
relationships of tasks
to explain how tasks
can exist and be used
in a specific field or
environment.

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TYPESOF
ONTOLOGIES
(conti…)
DOMAIN
ONTOLOGY
TASK
ONTOLOGY
APPLICATION
ONTOLOGY
TOP LEVEL
ONTOLOGY
The ontology
which represents
concepts
belonging to part
of the world is
called domain
ontology

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TYPESOF
ONTOLOGIES
(conti…)
DOMAIN
ONTOLOGY
TASK
ONTOLOGY
APPLICATION
ONTOLOGY
TOP LEVEL
ONTOLOGY
The ontology which is
engineered for a
specific use or
application focus and
whose scope is
specified through
testable use cases is
called application
ontology

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SPARQL
SPARQL Protocol
And RDF Query
Language
SPARQL is an RDF
query language
SPARQL allows for a
query to consist of
triple patterns,
conjunctions,
disjunctions and
optional patterns
SPARQL is able to
retrieve and
manipulate data
stored in Resource
Description
Framework (RDF)
format

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OWL –WEB
ONTOLOGY
LANGUAGE
 TheWeb Ontology Language (OWL) is a family of
knowledge representation languages for authoring
ontologies.
 OWL exists in various flavors:
 OWL EL
 OWL RL
 OWL QL
 OWL2 DL
 OWL2 Full

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USEOFOWL
WEB PORTALS
Content-based
searches for non-text
media

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USEOFOWL
(conti…)
MULTIMEDIA
COLLECTIONS
Categorization rules used
to enhance search

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USEOFOWL
(conti…)
CORPORATE WEB
SITE MANAGEMENT
(1) AutomatedTaxonomical
Organization of data and
documents
(2) Mapping Between
Corporate Sectors
(mergers!)

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USEOFOWL
(conti…)
DESIGN DOCUMENTATION
(1) Explication of derived
assemblies
(2) Explicit Management
of Constraints

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USEOFOWL
(conti…)
INTELLIGENT AGENTS
(1) Expressing User
Preferences and/or
Interests
(2) Content Mapping
between Web sites

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USEOFOWL
(conti…)
WEB SERVICES AND
UBIQUITOUS COMPUTING
(1)Web Service
Discovery and
Composition
(2) Rights Management
and Access Control

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GIST

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