Linkage.shex

ShEx statement for linkage

PREFIX fhir: <http://hl7.org/fhir/> 
PREFIX fhirvs: <http://hl7.org/fhir/ValueSet/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 

IMPORT <code.shex>
IMPORT <boolean.shex>
IMPORT <Resource.shex>
IMPORT <Reference.shex>
IMPORT <Organization.shex>
IMPORT <Practitioner.shex>
IMPORT <DomainResource.shex>
IMPORT <BackboneElement.shex>
IMPORT <PractitionerRole.shex>

start=@<Linkage> AND {fhir:nodeRole [fhir:treeRoot]}

# Links records for 'same' item
<Linkage> EXTENDS @<DomainResource> CLOSED {   
    a [fhir:Linkage]?;fhir:nodeRole [fhir:treeRoot]?;

    fhir:active @<boolean>?;                # Whether this linkage assertion is 
                                            # active or not 
    fhir:author @<Reference> AND {fhir:link 
    			@<Organization> OR 
    			@<Practitioner> OR 
    			@<PractitionerRole> ? }?;  # Who is responsible for linkages
    fhir:item @<OneOrMore_Linkage.item>;    # Item to be linked
}  

# Item to be linked
<Linkage.item> EXTENDS @<BackboneElement> CLOSED {   
    fhir:type @<code> AND
    	{fhir:v @fhirvs:linkage-type};  # source | alternate | historical
    fhir:resource @<Reference> AND {fhir:link 
    			@<Resource> ? };  # Resource being linked
}  

#---------------------- Cardinality Types (OneOrMore) -------------------
<OneOrMore_Linkage.item> CLOSED {
    rdf:first @<Linkage.item>  ;
    rdf:rest [rdf:nil] OR @<OneOrMore_Linkage.item> 
}

#---------------------- Value Sets ------------------------

# Used to distinguish different roles a resource can play within a set of linked resources.
fhirvs:linkage-type ["source" "alternate" "historical"]