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Most of the Web's content today is designed
for humans to read, not for computer programs to manipulate meaningfully.
Computers can adeptly parse Web pages for layout and routine processing—here
a header, there a link to another page—but in general, computers have no
reliable way to process the semantics
The Semantic Web will bring structure to the meaningful content of Web
pages, creating an environment where software agents roaming from page
to page can readily carry out sophisticated tasks for users.
The Semantic Web is not a separate Web but an extension of the current
one
To date, the Web has developed most rapidly as a medium of documents for
people rather than for data and information that can be processed automatically.
For the semantic web to function, computers must have access to structured
collections of information and sets of inference rules that they can use
to conduct automated reasoning.
Semantic Web researchers, in contrast, accept that paradoxes and unanswerable
questions are a price that must be paid to achieve versatility.
Adding logic to the Web—the means to use rules to make inferences, choose
courses of action and answer questions—is the task before the Semantic
Web community at the moment.
Two important technologies for developing the Semantic Web are already
in place: eXtensible Markup Language (XML) and the Resource Description
Framework (RDF).
Subject and object are each identified by a Universal Resource
Identifier (URI), just as used in a link on a Web page.
the URIs ensure
that concepts are not just words in a document but are tied to a unique
definition that everyone can find on the Web
The semantic web is not "merely" the tool for conducting individual tasks
that we have discussed so far. In addition, if properly designed, the Semantic
Web can assist the evolution of human knowledge as a whole.
Most of the Web's
content today is designed for humans to read, not for computer programs to
manipulate meaningfully. Computers can adeptly parse Web pages for layout
and routine processing--here a header, there a link to another page--but in
general, computers have no reliable way to process the semantics
Subject and object are each identified by
a Universal Resource Identifier (URI), just as used in a link on a Web
page.
The Semantic Web is not a separate Web but an extension of the current
one
To date, the Web has developed most rapidly as a medium of documents for
people rather than for data and information that can be processed
automatically.
For the semantic web to function,
computers must have access to structured collections of information and
sets of inference rules that they can use to conduct automated reasoning.
Semantic Web researchers, in contrast, accept that paradoxes and
unanswerable questions are a price that must be paid to achieve
versatility.
Adding logic to the Web--the means to use rules to make inferences,
choose courses of action and answer questions--is the task before the
Semantic Web community at the moment.
Two important technologies for developing the Semantic Web are already
in place: eXtensible Markup Language (XML) and the Resource Description
Framework (RDF).
The Semantic Web will bring structure to the meaningful content of Web
pages, creating an environment where software agents roaming from page to
page can readily carry out sophisticated tasks for users.
the URIs
ensure that concepts are not just words in a document but are tied to a
unique definition that everyone can find on the Web.
he third basic component of
the Semantic Web, collections of information called ontologies.
an ontology is a document or file that
formally defines the relations among terms. The most typical kind of
ontology for the Web has a taxonomy and a set of inference rules.
even
agents that were not expressly designed to work together can transfer data
among themselves when the data come with semantics.
your computer asks the service for a proof of its answer
Another vital feature will be digital signatures, which are encrypted
blocks of data that computers and agents can use to verify that the
attached information has been provided by a specific trusted source
URIs can point to anything, including
physical entities, which means we can use the RDF language to describe
devices such as cell phones and TVs.
The semantic web
is not "merely" the tool for conducting individual tasks that we have
discussed so far. In addition, if properly designed, the Semantic Web can
assist the evolution of human knowledge as a whole.