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The SNOMED International URI specifications use the namespace http://snomed.info/sct for the code system, and the URI http://snomed.info/id for the individual concepts in the code system. This means that when a SNOMED CT concept is converted from the system::code pair, where the system is http://snomed.info/sct, to the RDF ontological form, the representation is http://snomed.info/id/[concept-id]. Expressions are represented using the URI pattern http://snomed.info/scg/[expression]. Expressions represented in this way SHALL not contain whitespace, terms, or comments.
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In addition, any SNOMED CT relationships where the relationship type is subsumed by 246061005 |Attribute 410662002 |Concept model attribute| automatically become properties. For example, the laterality property is represented using the conceptId for 410662002 |Laterality|:
| Laterality410662002 | codeIn | this case, the URI (See the code system definition) The equivalent URI for the Laterality property is http://snomed.info/id/272741003, which can be used to unambiguously map to the underlying concept (see the code system definition). |
Note that when a $lookup operation is performed on a SNOMED CT concept, servers SHALL return the full URI for the edition and version being used (see above) in the version property. Other properties are at the discretion of the server and the client.
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