Information Technology Reference
In-Depth Information
Wizard
GPS
Landmark 1
Landmark 2
Landmark 3
User's comments
Selection engine
Landmark 1
Landmark 3
Agent
Figure 13.3
Using selection engine to filter unnecessary landmarks.
not all landmarks would be used for searching web pages on the Internet
because it is too inefficient. By processing strings of landmarks and user
comments, mark l and mark 2 would not be the users' most interesting
objects. So they are ignored. The rest will then be sent to the agent for
collecting information.
The concept of a landmark selection engine is simple. The input source
of the selection engine is a set of strings generated by the GPS in a PDA.
The selection engine will find the maximum similar substring in all input
landmark strings. There could be several similar names of landmarks in the
same region of the visitor. We chose some terms appearing in those strings of
landmarks as keywords for further searching by the agent. The approximate
procedures are listed as follows:
1. Storing all landmarks around visitors for selecting representative
keywords
2. Comparing all input landmark strings and users' comments for
generating keywords
3. Passing those selected keywords to an agent for searching related
web pages on the Internet
