Automatic Record Extraction for the World Wide Web

As the amount of information on the World Wide Web grows, there is an increasing demand for software that can automatically process and extract information from web pages. Despite the fact that the underlying data on most web pages is structured, we cannot automatically process these web sites/pages as structured data. We need robust technologies that can automatically understand human-readable formatting and induce the underlying data structures. In this thesis, we are focused on solving a specific facet of this general unsupervised web information extraction problem. Structured data can appear in diverse forms from lists to trees to even semi-structured graphs. However, much of the information on the web appears in a flat format we call “records”. In this work, we will describe a system, MURIEL, that uses supervised and unsupervised learning techniques to effectively extract records from webpages. Thesis Supervisor: David R. Karger Title: Professor