Information is the core of Business Architecture. Coming historically from Product Information Management (PXM) consulting in sector wide scenarios for retail and manufacturing in questions of • Data Architecture • Data Modeling • Data Governance • Data Redesign morphe* extended this to MDM leaded by market requirements and more and more abstracted to Enterprise Architecture which relates information, data, processes, organization and business models to a customer centric approach for nowadays requirements. ECLASS as a classifying and describing product ontology plays a necessary, outstanding keyrole in relating product knowledge to other knowledge concepts for business.