2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/31819We study the core fragment of the Elog wrapping language used in the Lixto system (a visual wrapper generator) and formally compare Elog to other wrapping languages proposed in the literature.12 pages, 0 figures, second part of long version of PODS 2002 paper "Monadic Datalog and the Expressive Power of Languages for Web Information Extraction". First part accepted for JACMDatabasesF.1.1, F.4.1, F.4.3, H.2.3, I.7.2text