EKG annotation example using a paired Observation with valuePeriod

@prefix fhir: <http://hl7.org/fhir/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

# - resource -------------------------------------------------------------------

# A paired Observation annotates an abnormal interval in the referenced EKG waveform.

<http://hl7.org/fhir/Observation/ekg-abnormal-period> a fhir:Observation ;
  fhir:nodeRole fhir:treeRoot ;
  fhir:id [ fhir:v "ekg-abnormal-period"] ; # 
  fhir:text [
     fhir:status [ fhir:v "generated" ] ;
     fhir:div [ fhir:v "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n      <p>This Observation identifies the abnormal interval from 09:30:35.240 to 09:30:35.320 in the EKG waveform referenced by derivedFrom.</p>\n    </div>"^^rdf:XMLLiteral ]
  ] ; # 
  fhir:status [ fhir:v "final"] ; # 
  fhir:code [
     fhir:text [ fhir:v "Abnormal EKG period" ]
  ] ; # 
  fhir:subject [
     fhir:l <http://hl7.org/fhir/Patient/f001> ;
     fhir:reference [ fhir:v "Patient/f001" ] ;
     fhir:display [ fhir:v "P. van de Heuvel" ]
  ] ; # 
  fhir:effective [
     a fhir:DateTime ;
     fhir:v "2015-02-19T10:00:00+01:00"^^xsd:dateTime
  ] ; # 
  fhir:performer ( [
     fhir:l <http://hl7.org/fhir/Practitioner/f005> ;
     fhir:reference [ fhir:v "Practitioner/f005" ] ;
     fhir:display [ fhir:v "A. Langeveld" ]
  ] ) ; # 
  fhir:value [
     a fhir:Period ;
     fhir:start [ fhir:v "2015-02-19T09:30:35.240+01:00"^^xsd:dateTime ] ;
     fhir:end [ fhir:v "2015-02-19T09:30:35.320+01:00"^^xsd:dateTime ]
  ] ; # 
  fhir:derivedFrom ( [
     fhir:l <http://hl7.org/fhir/Observation/ekg> ;
     fhir:reference [ fhir:v "Observation/ekg" ] ;
     fhir:display [ fhir:v "EKG waveform" ]
  ] ) . # 

<http://hl7.org/fhir/Patient/f001> a fhir:Patient .

<http://hl7.org/fhir/Practitioner/f005> a fhir:Practitioner .

<http://hl7.org/fhir/Observation/ekg> a fhir:Observation .

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