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The application has a flexible searching architecture in the background that allows additional searching algorithms to be implemented and incorporated into the application. By default, three choices are offered:
ATOM STANDARD - tuned to be the most useful search for general concept browsing. The background algorithm is complex and out-of-scope to fully document here. By default, this is configured to find only “active” concepts.
EXACT - this is does a more-or-less “exact-ish” search (when not normalizing for whitespace, some stop words, and punctuation)
NGRAM - useful for when you’re not sure of the spelling of something, or not sure whether the terminology uses noun-like or adjective-like language to label concepts (e.g. “cervical” vs “cervix”).
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Lucene Searching “Tricks”
The “ATOM” “STANDARD” search handler also allows for use of “lucene syntax” within the query, where if you understand the underlying data model - you can tune searches to specific aspects of the content. Here are some examples of queries making use of the Lucene syntax:
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< 71388002 | Procedure | : has_indirect_procedure_site = <<64033007 | Kidney structure |- Procedures with a direct procedure site of “kidney” or any of it’s descendants.< 71388002 : has_indirect_procedure_site = <<64033007- Same as the query above, but with the name portions removed.< 71388002 : 405814001 = <<64033007- Same as the query above, but using the SNOMEDCT_US concept id for the relationship name instead of the metadata label.^723264001 | Lateralizable body structure reference set |- members of the “Lateralizable body structure reference set”^723264001 | Lateralizable body structure reference set | AND << 362837007 | Entire cell |- members of that refset that are also descendants (or self) of “Entire Cell”<< I11 | Hypertensive heart disease |- an ECL expression used with ICD10CM to find I11 and all of it’s descendants.* : MAPPING=B20- an (enhanced) ECL expression used to find concepts with mappings to a particular code (e.g. in this case SNOMED concepts with B20 as an ICD10 code)Other examples will be provided in the future - as will more documentation on the complete model of what ECL is supported
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