Table 1.

An example predicate and candidate expression for subsumption querying

Concept	384963009 | chest wall involved by direct extension of malignant neoplasm |
Normal form	384963009 | chest wall involved by direct extension of malignant neoplasm |: 116676008 | associated morphology | = 49755003 | morphologically abnormal structure |
Predicate expression (SNOMED CT extension)	385413003 | tumor extension finding |: 363714003 | interprets | = 370052007 | status of invasion by tumor | {116676008 | associated morphology | = 49755003 | morphologically abnormal structure |, 363698007 | finding site | = 78904004 | chest wall structure | }
Candidate expression template	385413003 | tumor extension finding |: 363714003 | interprets | = <invasion> {116676008 | associated morphology | = <morphology>, 363698007 | finding site | = <topology> }

where <invasion>, <morphology> and <topology> are invasion, morphology and topology concepts from the free text used to populate the post-coordinated candidate expression template.

SNOMED CT, systematized nomenclature of medicine–clinical terms.