Chapter 15: Information Search and Visualization
15.5 - Advanced Filtering
-
Dynamic Queries - Adjusting sliders, buttons, etc and getting immediate
feedback
-
Also called direct-manipulation queries
-
Use sliders and other related controls to adjust the query
-
Get immediate (less than 100 msec) feedback with data
-
Hard to update fast with large databases
-
Need to accomplish the following:
-
select a set of sliders from a large set of attributes
-
specify greater than, less than, or greater than and less than
-
deal with boolean combinations of slider settings
-
choose among highlighting by color, points or light, regions, blinking,
etc
-
cope with tens of thousands of points
-
permit weighting of criteria
-
Commercial information-retrieval systems
-
DIALOG and FirstSearch
-
Use complex Boolean expressions - difficult to use
-
Complexity has led to Venn diagrams and decision tables
-
Water flow metaphor with filters
-
can use AND, OR, NOT
-
easy to learn and helps novice users
-
User-Constructed set of Keywords
-
Users create their profiles and media is scanned
-
Called: Selective Dissemination of Information (SDI)
-
Set of keywords is used to filter out information
-
Collaborative Filtering
-
Groups of users combine evaluations to help in finding items in a large
database
-
User "votes" and his info is used for rating the item on interest


