This lecture sets the scene for the rest of the Web
Services Theme. It covers the motivation behind Web
Services and its relative position within the
Distributed Computing market. In the second part of the
lecture, we attempt to revisit some basic technologies
that are required for Web Services like XML, WSDL and
SOAP. The lectures will go so deep into these
technologies as it is required for understanding web
services and the material that is included in the
lectures to follow.
Breakdown
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Web Services
Basic definition of the technology and some
motivation for it. Benefits of Web Services compared
to other distributed system’s technologies.
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Distributed Systems
Existing distributed system’s technologies like
CORBA, COM and RMI.
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Service Based Architectures
The basic architectures that one can have with web
services and how they are used to solve a scientific
problem.
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XML Primer
Introduction to XML. Elements, Attributes,
Processing Instructions defined and composed into a
small example useful for web services.
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XML Namespaces
The problem that arises by the flexibility of
defining your own tags in XML and how it is solved
using Namespaces
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XML Schema
Giving predefined structure to XML documents using
the XML Schema
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WSDL
The WSDL as a specific XML Schema for describing Web
Services
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SOAP
The protocol that makes Web Services actually work.