definition user {}

definition team {
    relation owner: user
    relation manager: user
    relation parent: team
    relation direct_member: user

    permission member = owner + manager + direct_member + team->member
}

// Testing relationships
team:tam#owner@user:phil#...
team:tam#manager@user:reid#...
team:tam#direct_member@user:mark#...
team:stap#owner@user:steven#...
team:stap#direct_member@user:zhinan#...
team:stap#parent@team:tam   (What I want to say is:  Team TAM is a parent of Team STAP, is this line correct?)