Hey team- searched around discord, docs, and repo but couldn't find a clear answer: 1. Does Medplum support the

:above

and

:below

search modifiers [for searching hierarchies](https://hl7.org/fhir/R4/search.html#recursive)*? For example-

/Location?partof:below=Location/12345

It seems as if that's generating just one

Condition

in the query builder

{
  operator: '=',
  parameter: 'Location/12345',
  parameterType: undefined,
  column: Column {
    tableName: 'T2',
    columnName: 'partof',
    raw: undefined,
    alias: undefined
  }
}

2. If it does support this and I'm mistaken or if it's on the roadmap, would/should it support `:above`/`:below` as part of a chained search? I.e.

/Observation?subject:Location.partof:below=Location/12345

. It's not even clear from the [spec](https://hl7.org/fhir/R4/search.html#recursive) if that's intended usage.

Seems both are supported 🤔 https://github.com/medplum/medplum/blob/057585d75cf86066120d2897b53196d7f2447a6a/packages/core/src/search/search.ts#L73-L74 https://github.com/medplum/medplum/blob/057585d75cf86066120d2897b53196d7f2447a6a/packages/core/src/search/parse.test.ts#L314-L326 https://github.com/medplum/medplum/blob/057585d75cf86066120d2897b53196d7f2447a6a/packages/core/src/search/search.test.ts#L338-L355

Yeah I saw that too. I think that only works for [token](https://www.hl7.org/fhir/R4/search.html#token) and [URI](https://www.hl7.org/fhir/R4/search.html#uri) but I’m not ruling out user error. I should have been more clear in the original that this is specifically for

:above

and

:below

on [hierarchical references](https://www.hl7.org/fhir/R4/search.html#recursive)