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Adaptive web sites vary along a number of design axes.
- Types of adaptations.
New pages may be created. Links may be added or removed,
highlighted or rearranged. Text, link labels, or formatting may be
- Customization vs. Transformation. Customization is
modifying a web site to suit the needs of an individual user;
customization necessitates creating a large number of versions of
the web site -- one for each user. In contrast, transformation involves
altering the site to make navigation easier for a large set of
users. For example, a university web site may be reorganized to
support one ``view'' for faculty members and a distinct view for
students. In addition, certain transformations may seek to improve the site
for all visitors.
- Content-based vs. Access-based.
A site that uses content-based adaptation organizes and presents pages
based on their content -- what the pages say and what they are about.
Access-based adaptation uses the way past visitors have interacted with
the site to guide how information is structured. Naturally,
content-based and access-based adaptations are complementary and may
be used together.
- Degree of automation. Excite and Yahoo's manually
personalized home pages
are a simple example of customization; we are interested in more
automatic adaptation techniques. However, for feasibility,
adaptive web sites are likely to be only partially automated.
We now survey previous work on adaptive web site using the vocabulary and distinctions introduced above.
Next: Previous Work Up: Introduction and Motivation Previous: Introduction and Motivation Mike Perkowitz