Fedora Commons in the CLARIN Infrastructure ISOcat and RELcat, two cooperating semantic registries Semantic Mapping in CLARIN Component Metadata. Collaboratively Defining Widely Accepted Linguistic Data Categories in the ISOcat Data Category Registry A CMD Core Model for CLARIN Web Services LDL 2012 - Linking to ISOcat Data Categories What do cats have to do with explicit semantics? On the way to a Relation Registry for ISOcat data categories Use of ISOcat within CMDI ISOcat: a short introduction Sustainable operability: Keeping complex linguistic resources alive.