This presentation shows the online service launched by the Interoperability Solutions for European Public Adminitrations (ISA) Programme of the European Commission to make it easier for public administrations to find and re-use ICS specifications. More than one thousand specifications from organisations, including several Member States and standardization bodies, can be found via the European Commission Joinup Portal (https://joinup.ec.europa.eu/catalogue/all). By increasing the visibility and promoting the re-use of existing semantic assets the European Commission fosters semantic interoperability among information systems developed in different Member States.