Recursive Programs for Document Spanners

international conference on database theory, 2019.

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EI

Abstract:

A document spanner models a program for Information Extraction (IE) as a function that takes as input a text document (string over a finite alphabet) and produces a relation of spans (intervals in the document) over a predefined schema. A well studied language for expressing spanners is that of the regular spanners: relational algebra ove...More

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