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How Automated is Automated?
Automated subject indexing requires significant human
input. But once setup, one can easily index millions of documents.
l creating
preprocessing rules
l creating stopword
list
l iteratively
running clustering
l identifying junk
topics
l interpreting and
hand-labeling topics
l choosing number
of topics
l mapping topics to
a standard set of subject
headings
l figuring out when
to re-cluster
l integrating
automatically generated topics
into existing systems
l preprocessing
l clustering
l classification
Not Automated
Automated
Lessons Learned