The literature provides a wide range of techniques to assess and improve the quality of data.
Due to the diversity and complexity of these techniques, research has recently focused on …

In the last few years, several works in the literature have addressed the problem of data
extraction from Web pages. The importance of this problem derives from the fact that, once …

Current-day crawlers retrieve content only from the publicly indexable Web, ie, the set of
web pages reachable purely by following hypertext links, ignoring search forms and pages …

The exponential growth and capillar diffusion of the Web are nurturing a novel generation of
applications, characterized by a direct business-to-customer relationship. The development …

Many challenging problems in information systems engineering involve the manipulation of
complex metadata artifacts or models, such as database schema, interface specifications, or …

This paper describes a methodology for the development of WWW applications and a tool
environment specifically tailored for the methodology. The methodology and the …

Extracting information from web documents has become a research area in which new
proposals sprout out year after year. This has motivated several researchers to work on …

Most modern applications are immutable and turn-key despite the acknowledged benefits of
empowering users to modify their software. Writing extensible software remains challenging …

The success of the World Wide Web has caused the concept of information system to
change. Web information Systems (WIS) use from the Web its paradigm and technologies in …

Flexible queries facilitate, in a novel way, easy and concise querying of databases that have
varying structures. Two different semantics, flexible and semiflexible, are introduced and …