Guide to reifnitiv.data search functions

Is there a comprehensive guide which shows how to build search functions in python. For example, I need to program a loan search function in the form below but with other search parameters and output. How do I identify how to add other search parameters and which output fields are available:

df = rd.discovery.search(

view = rd.discovery.Views.LOAN_INSTRUMENTS,

top = 5,

filter = "Currency in ('USD')",

select = "PermID,Currency"

)