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WAP Service Developer's Guide for Nokia Series 40
Version 1.0
Copyright © 2002. Nokia Corporation. All rights reserved.
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2.6 Take care of backward navigation
Due to the differences between WAP and the Web in regard to the processing of the history,
only the history processing described in the WML specifications is followed. This means that
the service provider must be responsible for navigation as a whole.
2.7 Use of card titles and element labels
Card titles describe the content of the display and their use is recommended. They help the
user to navigate in the application because they function as a reminder of where the user is
in the application. The item previously selected by the user should determine the header text.
For instance, the card title ‘Bookmarks’ tells the user that the display contains a list of
bookmarks in the application and that the options item previously selected was Bookmarks.
Proportional fonts are used in header texts, and if the header text is too long, it is
automatically truncated. Truncation is usually better than abbreviation, because the user
might be confused by unfamiliar abbreviations that can be difficult to understand.
2.8 Performing a usability test
It is always good to perform a usability test of new applications. People who have not been
involved in the design or development of the applications tend to notice potential usability
problems that are often not obvious to those who know the design by heart. Usability tests
should always be performed as early as possible in the development process. Any necessary
changes resulting from the tests can then be implemented within the development
timescale. Try to recruit users who are representative of the end users of the application, and
try to conduct the usability test on a smaller scale, if the schedule does not allow for
extensive testing.