Page 36 - DCAP603_DATAWARE_HOUSING_AND_DATAMINING

Data Warehousing and Data Mining

notes
figure 2.7: examples of time-series Data

Worldwide Web

The Worldwide Web is the most heterogeneous and dynamic repository available. A very large
number of authors and publishers are continuously contributing to its growth and metamorphosis,
and a massive number of users are accessing its resources daily. Data in the Worldwide Web
is organised in inter-connected documents. These documents can be text, audio, video, raw
data, and even applications. Conceptually, the Worldwide Web is comprised of three major
components: The content of the Web, which encompasses documents available; the structure of
the Web, which covers the hyperlinks and the relationships between documents; and the usage of
the web, describing how and when the resources are accessed. A fourth dimension can be added
relating the dynamic nature or evolution of the documents. Data mining in the Worldwide Web,
or web mining, tries to address all these issues and is often divided into web content mining, web
structure mining and web usage mining.

engineering Design Data

Database technology has evolved in parallel to the evolution of software to support engineering.
In these applications relatively simple operations are performed on large volumes of data with
uniform structure. The engineering world, on the other hand, is full of computationally intensive,
logically complex applications requiring sophisticated representations. Recent developments in
database technology emphasise the need to provide general-purpose support for the type of
functions involved in the engineering process such as the design of buildings, system components,
or integrated circuits etc.

Task Discuss the purpose of ER diagram in database management system.

30 LoveLy professionaL university