Introduction to information and knowledge access systems ikas
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Introduction to Information and Knowledge Access Systems (IKAs). Istud151. Introduction to Information and Knowledge Access Systems. IKAS : provide access to information resources facilitating learning, research, innovation, problem solving and decision making.

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Introduction to Information and Knowledge Access Systems

  • IKAS : provide access to information resources facilitating learning, research, innovation, problem solving and decision making.

  • IKAs facilitate their users in finding and accessing resources that help in improved understanding and knowledge about some phenomena


Examples of ikas
Examples of IKAs

  • Examples of such IKAs :

    1- Digital Libraries .

    2- Content Management Systems.

    3- Data Collections.

    4- Knowledge Management Systems.


The scope of ikas
The scope of IKAs

  • The scope of IKAs in terms of their usage , users and content.

    Aspects related to the scope of IKAs :

  • The users served by IKAs may be institutional, regional or global .

  • The scope can be defined in terms of subject domain, geographic boundaries, type of resources covered.


Components of ikas
Components of IKAs

  • At top level, IKAs consist of two components IKA itself and the users.

  • In many advanced IKAs:

    Information about the user community is also usually part of the IKAs.

    This is stored in the form of 'user profiles'.

    These profiles may be built and maintained automatically or manually.


User interacts with an ika
User interacts with an IKA

  • We may decompose the IKA into three components:

    1- The back-end.

    2- Front-end .

    3- The user.


User interacts with an ika1
User interacts with an IKA

  • The back-end : it is contains the content (information resources) which is accessed by the user via the front-end.

  • Front-end : the user does not access the information sources directly, he does so through a front-end (or user interface).


The ikas mechanism
The IKAs mechanism

  • As IKAs typically contain a large number of information sources, we cannot expect the users to examine all the sources for every information need.

  • IKAs have to provide a mechanism for the user to first find out if there exist one or more information sources that are likely to contain the required information, and then allow selection and access to these resources.


The ikas mechanism1
The IKAs mechanism

  • This is achieved by storing information about the information sources, i.e., their metadata information, separately and allowing users to browse and search this meta information.

    Further decomposition of IKA .


The ikas mechanism2
The IKAs mechanism

  • Information objects: are the information sources.

    Ex : books and journals in a conventional library, full-text articles in an e-journal, a video movie or lecture, an audio song or lecture, etc.

  • Metadata: is the information about these objects.

    Ex : the library catalogue, OPAC systems, user profiles (user is the information object in this case).


Note of finer points related to the information sources
Note of finer points related to the information sources.

  • 1- Information sources referred by the metadata may be part of the IKA or may lie outside the IKA.

    • Libraries are examples of IKAs where both the metadata (library catalog) and information sources (books, journals) reside within the IKA.

    • Bibliographic databases are example IKAs where publications referred by bibliographic records lie outside the system.

  • 2- The information sources referred by the metadata may take different forms .

    • print (e.g. a book), digital (e.g. a website, audio clip), artifact (e.g. a painting, sculpture) or a living being (e.g. plants, people).


Note of finer points related to the information sources1
Note of finer points related to the information sources.

  • Finally, the content in the back-end has to come from some where!

  • This is handled through the content development and management component.

  • This includes content selection, evaluation, procurement/ licensing, capturing and conversion, metadata preparation, loading, maintenance and administration.


Content development and management component
Content development and management component

  • In digital, networked systems, much of the related workflow happens through content management related interfaces.


Conclusion
Conclusion

  • Increasingly, in a networked environment (within intranets or on Internet), IKAs may need to interact with other IKAs to support distributed search queries or for information exchange, So Interoperabilityof IKAs is a key challenge today.

  • This has implications for metadata standards, naming schemes, vocabularies and protocols that enable such interoperability.



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