A query is a medical concept that can be extracted from a database through a 'where' clause in a 'SQL' statement. This includes concepts.
domain
The domain to search (e.g. "Condition", "Drug", "Measurement", etc)
conceptSet
The Concept set describing the observation to serach for
attributes
a list of attributes that modify the query (e.g. `male()`, `female()`, `age(gte(65))`)