The FHIR model is available at http://data.developer.nhs.uk/fhir/eRS/Chapter.1.About/index.html
Noticed the DocumentReference profile (http://data.developer.nhs.uk/fhir/eRS/Profile.ReferralRequestResponse/ers-documentreference-1.html) is using different code systems. I would prefer DocumentType to be be the same SNOMED set used by National Record Locator Service - NRLS (and others). http://www.diseasesdatabase.com/snomed/snomed_subset_browser.asp?dblSubsetID=44041000000135
Also would prefer this to follow NRLS and also include DocumentReference.class/specialty (this can be inferred from ReferralRequest but it saves processing if we don’t have to transform the DocumentReference). Specialty should be the same SNOMED valueSet as GPConnect and NRLS [care-setting-codes-snct-1] (would accept NHS Data Dictionary valueSet also).
In ReferralRequest would prefer the reference to Patient to be actual reference e.g. https://pds.proxy.nhs.uk/Patient/9409401122 rather than a reference to a contained resource [It makes reading the resource easier and makes it consistent with NRLS]
Would like examples to also be available in XML and the JSON to be formatted for human reading (prettyprint?)