This document gives an overview and guidance in the usage of existing electronic product catalogues for eBusiness. On one hand an overview of relevant eCatalogue formats will be given on an quantitative level. On the other hand a qualitative comparison of existing catalogue formats has been done to show differences of the content in detail. In addition, this document will show future directions in eCatalogues and points out areas of standardization for eCatalogues. The document shall be used as guideline for future selection, implementation and usage of electronic product catalogues. This document is addressed to decision makers within organizations and companies as well as technically interested persons who want to get some knowledge about the technical differences between existing catalogue formats.