H. Holger Rath is Head of Consulting at empolis GmbH - a Germany based company providing premium products and services for content management and knowledge management. Holger started at STEP Electronic Publishing Solutions GmbH - a company acquired by empolis - in 1996 as senior consultant and project manager and headed the consulting department from 1998-2001. Prior to his work for STEP he was head of the Document Computing department at the Computer Graphics Center (ZGDV e.V.). Holger represents Germany in the ISO standards committee which is responsible for SGML, DSSSL, HyTime, and Topic Maps. He is co-editor of the new ISO standards initiative TMQL (Topic Map Query Language) and chair of the OASIS TC 'Vocabulary for XML Standards and Technologies'.