
Exploring Content to Find Entities ◾ 51
Document Level
While some changes to a taxonomy may be made at the class level, others
require a ner degree of control. ese are called document level changes
and consist of moving or copying selected documents from a source cat-
egory to a destination category. e most dicult part of this operation
from the user’s point of view is selecting exactly the right set of documents
to move so that the source and destination categories are changed in the
manner desired.
One of the most natural and common ways to select a set of documents
is with a keyword query. Documents that are found using the keyword ...