National Record Locater API - standards

As suggested by techUK in their draft ten point plan, the National Record Locater should support key standards such as Integrating the Healthcare Enterprise (IHE) Cross-Document Sharing (XDSb.) and Cross Community Access (XCA). Many vendors already support these standards but without being able to interact using them, they have to build bespoke integration, and this makes adoption much harder. Furthermore, these standards have already solved these problems before the sharing of information, and we do not want to re-invent the wheel again and solve them in a different way.