{ public OwnersClause(ClauseType_InCollection t, string v) : base("owners", t, v) { }
{ public ReadersClause(ClauseType_InCollection t, string v) : base("readers", t, v) { }
{ public ParentsClause(ClauseType_InCollection t, string v) : base("parents", t, v) { }
{ public WritersClause(ClauseType_InCollection t, string v) : base("writers", t, v) { }