Structure of Semantic web

Here is a detail about structure of semantic web with an e-learning model.

1. Semantic web
1Dr. Sushma N Jogan

2. Introduction
•It is the next giant step of current web technology.
•Possible to express information in a precise, machine-
interpretable form, ready for software agents to process, share
and reuse it.
•The application of the semantic web in e-learning is in 2 areas:
i. Software that supports instructors to perform their tasks in
flexible online educational settings
ii. Software that interprets the structure of distributed, self
organized and self-directed WBL.
2Dr. Sushma N Jogan

3. Conti……….
•the semantic web was a solution to the problem arisedfrom WWW>
•So, it is proposed new WWW architecture to support not only the
web content but also associated formal semantics.
•It appears as a promising technology for implementing e-learning.
•It created an environment in which human and machine agents will
communicate on a semantic basis.
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SW
Common formats -
interchange of
documents
Language for recording

4. Components:
Dr. Sushma N Jogan 4

5. In detail….
1.URI & Unicode: provides a simple and extensible way for identifying
resources. Eg: website, doc., image etc.
2.XML: describes what is in the doc. not what document looks like. XML
schema provides grammars for leagalXML documents.
3.Data interchange and RDF layer: uses URIs to identify web resources and
uses a graph model for the purpose of describing the relationship between
different resources.
RDF schema is a simple modeling language introducing classes or
resources, properties and relations between them.
4. Ontology, Query, and others: backbone for the SW architecture providing
machine processable semantics and a sharable domain which can facilitate
communication b/w people and different applications.
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6. Conti…….
5.Unifying Logic layer: the foundation for combining the above two layers
technologies into a whole, with a unifying language to engage queries and
rules over knowledge represented in RDF.
6.Proof layer: used for checking the validity of specific statements
7.Trust layer: depends on the source of information as well as the policies
available on the information source which can deny wanted applications or
users access to these sources.
8.User interface and allocations layer: deploys a baseline that all user
interfaces and applications should satisfy.
9.Vertical layers: crypto: starts from layer 1 to layer 6. digital signature is a
step towards a web of trust (for identification).
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7. Dr. Sushma N Jogan 7