I don't know of any document that HP provides that would include all of the package definitions. The Data Model Guide describes the tables, but not the packages. However, I can tell you the functions you are looking for:
FUNCTION get_pool_managers_list (rp_id IN NUMBER) RETURN VARCHAR2;
FUNCTION get_project_managers (p_project_id IN NUMBER) RETURN VARCHAR2; FUNCTION get_project_manager_usernames (p_project_id IN NUMBER) RETURN VARCHAR2; FUNCTION get_project_manager_name_list (p_project_id IN NUMBER) RETURN VARCHAR2;
I pulled these directly from the DDL of the package spec. Each function returns a ';' delimited list. The RP list is a First Last list as is the PM Name List. The PM Username function returns usernames and the other one returns user IDs. Hope this helps!