A method for determining active topics may include receiving topic information for
a document, the information including at least one topic and a weight for each
topic, where the topic relates to content of the document, and the weight
represents how strongly the topic is associated with the document. User activity
information for the document, including a user activity value including at least
one of a number of viewers and a number of editors of the document may be received.
A topic intensity for each topic may be generated and stored by multiplying the
user activity value for the document by the weight of the topic in the document.
The topic intensity may be monitored over time. An alert may be generated based on
the topic intensity.