The OntoIOp stands for Ontology Integration and Interoperability and is a new working item which is currently being standardised as ISO NP 17347 by ISO TC37/SC 3. The goal of the standard is to provide the guidelines for ontological modularity and structuring mechanisms within an ontology. The standard does not include the definition of basic ontology or processes, but provides a framework specifying a language for distributed knowledge representation in ontologies, and outlining the principles and key structural elements for representation of information in ontologies and knowledge bases, mappings mechanisms between ontologies, annotation of ontologies, translation mechanisms between ontology languages, etc. Furthermore the standard provides ways to accomodate an interoperability between different ontology Languages.