To enable the interoperability of APIs at all levels (whether among systems, sectors, or geographies), the adoption of common data standards is necessary. Open data standards and ontologies provide a reference point that enables two parties to share data and information in a way that ensures understanding is preserved and the meaning can be conveyed.
58) To that end organisations should adopt international open data standards and ontologies when providing an API in order to ensure maximum interoperability.
59) For more detailed information on appropriate data standards please see Appendix D.