Date Added: Oct 2009
Tables are a universal idiom to present relational data. Billions of tables on Web pages express entity references, at-tributes and relationships. This representation of relational world knowledge is usually considerably better than completely unstructured, free-format text. At the same time, unlike manually-created knowledge bases, relational information mined from "Organic" Web tables need not be con-strained by availability of precious editorial time. Unfortunately, in the absence of any formal, uniform schema imposed on Web tables, Web search cannot take advantage of these high-quality sources of relational information.