Filling in code predicates with SNOMED

1_starting_graph.ttl

@prefix : <http://smartplatforms.org/terms#> .
@prefix dcterms:<http://purl.org/dc/terms/>.

# We start with a mixed bag:
#  some problems have local code only
#  some problems have snomed code only
#  some problems have both

<http://pboth>  a :Problem;
  :code <http://some.refrence.to/icd9#982.1>;
  :snomedCode <http://www.ihtsdo.org/snomed-ct/concepts/74267005>;
  :startDate "2011-05-05".

<http://plocal>  a :Problem;
  :code <http://some.refrence.to/icd9#982.1>;
  :startDate "2011-05-05".

<http://psnomedonly>  a :Problem;
  :code <http://www.ihtsdo.org/snomed-ct/concepts/74267005>;
  :startDate "2011-05-05".

<http://some.refrence.to/icd9#982.1> a :Code,:Diagnosis;
 dcterms:title "Toxic effect of; carbon tetrachloride";
 :system "http://some.refrence.to/icd9#";
 :translation [ 
    a :Translation;
    :targetCode <http://www.ihtsdo.org/snomed-ct/concepts/74267005> ;
    :translationFidelity <http://smartplatforms.org/terms/codes/TranslationFidelity#automated>.
  ]

<http://www.ihtsdo.org/snomed-ct/concepts/74267005> a :Code, :Diagnosis, :SNOMED;
  dcterms:title "Toxic encephalopathy due to carbon tetrachloride";
  :system "http://www.ihtsdo.org/snomed-ct/concepts/";
  :identifier "74267005".

2_augment_via_sparqlupdate.sparql

# this query implements some very basic 
# rules-based reasoning, augmenting the
# graph by supplying a :snomedCode for each
# :Problem.

PREFIX :<http://smartplatforms.org/terms#>
PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#>

insert { ?p :snomedCode ?s. } 
where {
  ?p a :Problem.
  ?p :code ?c.
  ?c (:translation/:targetCode)*  ?s.
  ?s a :SNOMED.
}

3_result.md

When a client requests the problem list, it sees the augmented graph. And so a developer can easily query for SNOMED identifiers:

SPARQL:

PREFIX :<http://smartplatforms.org/terms#>
select * where {
 ?p a :Problem.
 ?p :snomedCode ?s.
}

Yields:

@prefix : <http://smartplatforms.org/terms#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

<http://pboth> :snomedCode <http://www.ihtsdo.org/snomed-ct/concepts/74267005> .
<http://plocal> :snomedCode <http://www.ihtsdo.org/snomed-ct/concepts/74267005> .
<http://psnomed> :snomedCode <http://www.ihtsdo.org/snomed-ct/concepts/74267005> .