include "primitives.alh"
include "object_operations.alh"
include "modelling.alh"

SimpleAttribute String {
    name = "String"
}
SimpleAttribute Natural {
    name = "Natural"
}

Class Place {
    name = "Place"
    name : String
    tokens : Natural
    lower_cardinality = 1
    upper_cardinality = 1
}
