FHIR🔥 API Extensions
Boosting
The Extension URI http://ontoserver.csiro.au/profiles/boost can be added to the ValueSet.compose.include element to adjust the ranking up (value > 1.0) or down (value < 1.0) of codes when performing an $expand with filter.
The following example demonstrates usage:
{
"resourceType" : "ValueSet",
"url" : "http://csiro.au/example/ValueSet/boost1",
"compose" : {
"include" : [ {
"system" : "http://snomed.info/sct",
"filter" : [ {
"property" : "concept",
"op" : "is-a",
"value" : "30560011000036108"
} ],
// This extension reduces the significance of codes matching this filter
"extension" : [ {
"url" : "http://ontoserver.csiro.au/profiles/boost",
"valueDecimal" : 0.01
} ]
}, {
"system" : "http://snomed.info/sct",
"filter" : [ {
"property" : "concept",
"op" : "is-a",
"value" : "30404011000036106"
} ],
"extension" : [ {
// This extension increases the significance of codes matching this filter
"url" : "http://ontoserver.csiro.au/profiles/boost",
"valueDecimal" : 10.01
} ]
}, {
"valueSet": [
"http://snomed.info/sct?fhir_vs=refset/30513011000036104"
],
"extension" : [ {
// This extension increases the significance of codes in the imported ValueSet
"url" : "http://ontoserver.csiro.au/profiles/boost",
"valueDecimal" : 5.0
} ]
} ]
}
}