This page allows you to explore the use of SNOMED's ECL expressions via the /ValueSet/$expand operation on SNOMED Implicit ValueSets.
To use it, you can either click on a row in the table below to pre-populate the ECL or manually enter/alter the expression. Note that the | display text |, while valid in ECL, is not strictly permitted in an Implicit ValueSet URI, however Ontoserver is forgiving and does allow it.
To test the operation, click the Expand button to issue the appropriate /ValueSet/$expand call to Ontoserver. The actual request URL and the results will be displayed below. Note that the count parameter is being used to limit the number of concepts returned to 20.
| ECL expression examples |
|---|
| MemberOf 32570481000036109 |Emergency department diagnosis reference set| |
| << 80146002 |Appendicitis| |
| DescendantOf 80146002 |
| << 80146002 |Appendicitis| |
| DescendantOrSelfOf 80146002 |
| < 19829001 |Disorder of lung| AND < 301867009 |Edema of trunk| |
| < 19829001 |Disorder of lung| OR < 301867009 |Edema of trunk| |
| < 19829001 |Disorder of lung| MINUS < 301867009 |Edema of trunk| |
| << 404684003 |Clinical finding| : << 47429007 |Associated with| = << 267038008 |Edema| |