The number of research topics covered in recent approaches to Information Extraction
(IE) is continually growing as new facts are being considered. In fact,
while the user’s interest in extracting information from texts deals mainly with
the success of the entire process of locating, in document collections, facts of
interest, the process itself is dependent on several constraints (e.g. the domain,
the collection dimension and location, and the document type) and currently it
tackles composite scenarios, including free texts, semi- and structured texts such
as Web pages, e-mails, etc.