Method: HQMF1::PopulationCriteria#reference

Defined in:
lib/hqmf-parser/1.0/population_criteria.rb

#reference ⇒ Object 



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# File 'lib/hqmf-parser/1.0/population_criteria.rb', line 49

def reference
  reference = attr_val('./cda:observation/cda:sourceOf[@typeCode="PRCN"]/cda:observation[@classCode="OBS"]/cda:id/@root')
  reference = reference.upcase if reference
  reference
end