You can search for identifiers within the package.
in-package search v0.2.0
key-parsers
Asn1.Algorithm_identifier
val rsa_grammar : Rsa.Params.t Asn.t
val dsa_grammar : Dsa.Params.t Asn.t
val ec_grammar : Ec.Params.t Asn.t
val dh_grammar : Dh.Params.t Asn.t