The web is overflowing with implicitly structured data, spread over hundreds of thousands of
sites, hidden deep behind search forms, or siloed in marketplaces, only accessible as …

Wrapper induction is the problem of automatically inferring a query from annotated web
pages of the same template. This query should not only select the annotated content …

In this paper we study the prevalence of unique entity identifiers on the Web. These are, eg,
ISBNs (for books), GTINs (for commercial products), DOIs (for documents), email addresses …

Many data providers make their data available through Web service APIs. In order to
unleash the potential of these sources for intelligent applications, the data has to be …

In the era of industrial digitalization, people are increasingly investing in solutions that allow
their process for data collection, data analysis and performance improvement. In this paper …

The world wide web has become a large pool of information. Extracting structured data from
a published webpages has drawn attention in the last decade. The process of web data …

Set expansion is the task of finding elements of a set given example members. We are
interested in the design of algorithms and techniques for a set expansion tool that expands a …

The extraction of multi-attribute objects from the deep web is the bridge between the
unstructured web and structured data. Existing approaches either induce wrappers from a …

Data integration is an important task in order to create comprehensive RDF knowledge
bases. Many data sources are used to extend a given dataset or to correct errors. Since …

In this work, we address the problem of query rewriting using views, by adopting both a
theoretical and a pragmatic perspective. In the first and main chapter, we approach the topic …