Automatic information extraction from large websites.

Information extraction from websites is nowadays a relevant problem, usually performed by software modules called wrappers. A key requirement is that the wrapper generation process should be automated to the largest extent, in order to allow for large-scale extraction tasks even in presence of chang...

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Detalhes bibliográficos

Publicado no:	Journal of the ACM 51, 5 (2004).
Autor principal:	Crescenzi, Valter
Formato:	Artigo
Idioma:	English
Assuntos:	Theory of computation. Mathematical logic and formal languages. Formal languages. Classes defined by grammars or automata (e.g., context-free languages, regular sets, recursive sets). Information systems. Database management. Systems. Relational databases. Algorithms. Theory.