EHR Reference Model — Introduction

Clarotech.OpenEHR.RM (OpenEHR.RM.*) implements the structural backbone of an openEHR record store. It depends on Clarotech.OpenEHR.RM.Datatypes for all leaf data values.

Design patterns

Locatable — the identity backbone

Almost every class in the RM inherits from Locatable, which provides:

Property	Type	Purpose
Name	DvText	Human-readable name (mandatory)
ArchetypeNodeId	string	at0001-style node ID from the constraining archetype
Uid	UidBasedId?	Optional local unique ID
ArchetypeDetails	Archetyped?	Archetype + template binding
Links	ISet<Link>?	Cross-references to other objects

Pathable — AQL path navigation

Pathable (base of Locatable) allows objects to be addressed using AQL-style paths such as /data[at0001]/items[at0002]/value.

init-only properties

All RM classes use C# init-only properties. Construct with object-initialiser syntax and treat instances as effectively immutable after construction:

var section = new Section
{
    Name           = new DvText("History"),
    ArchetypeNodeId = "at0001",
    Items          = new List<ContentItem> { /* entries */ }
};

Package layout

Package	Guide page
EHR, versioning, contribution	EHR & Versioning
Composition, sections, entries	Composition
Common — audit, party, links	Common
Data structures — tree, list	Data Structures