NOT urgent. if any could point glaring mistakes. will write test_relationships but any help will be appreciated..

definition user {
}
definition team {
    relation parent: team
    relation team_company:company
    relation team_member: company#company_member
    relation team_admin: company#company_member
    permission add_team_members = team_admin
    permission read_members = team_member + team_admin
    permission add_team_to_document_group = team_admin
    permission remove_team_from_document_group = team_admin
    permission add_user_to_document = team_admin
    permission remove_user_to_document = team_admin
}
definition company {
    relation owner: user
    relation company_member: user
    relation teams_maintainer: user 
    // team actions
    permission create_teams = owner
    permission create_team_admin = owner
    permission change_team_name = teams_maintainer 
}
definition document_group {
    relation disclosed_team: team
    relation disclosed_user: user
    permission read_document_group = disclosed_user + disclosed_team
}
definition document {
    relation discgrp: document_group
    relation disc_item_team: team
    relation disc_item_user: user
    relation reader: document_group#disclosed_user | document_group#disclosed_team | disc_item_user
    relation writer: team#team_admin

    permission add_item = writer
    permission view = reader 
    
}