This paper has a twofold concern. First, to show that probabilitypropagation nets (PPNs) can be derived from formulae for conditionalprobabilities. Second, to show that PPNs are usable for (local)propagations of mass distributions, too, if the inscriptions are suitablyadapted.[...]

With the Multimedia Metadata Ontology (M3O), we havedeveloped a sophisticated model for representing among others the annotation,decomposition, and provenance of multimedia metadata. Thegoal of the M3O is to integrate the existing metadata standards andmetadata formats rather than replacing...