Hi guys,
I'm helping our client to pass a Chinese CHIMA FHIR certification, which requires to search encounter by subject(Patient) name.
I noticed that in FHIR specification, chained parameters were included, as below:
2.21.1.4.13 Chained parameters 
In order to save a client from performing a series of search operations, reference parameters may be "chained" by appending them with a period (.) followed by the name of a search parameter defined for the target resource. This can be done recursively, following a logical path through a graph of related resources, separated by .
