Interoperability is the key for SWIM. Interoperability Frameworks are created to structure and to classify the different interoperability aspects from different perspectives (IT systems, data/information, governance). Such Interoperability Frameworks are based on a layered model including network, technical, syntactical, semantic and even legal interoperability layers. The technical, the syntactical and the semantic interoperability layers all fall within the remit of SESAR SWIM. The technical interoperability layer is covered by SESAR SWIM Infrastructure Profiles.