Tryton is a high-level general purpose application platform. It is the base of a complete business solution as well as a comprehensive health and hospital information system (GNUHealth).

The sale subscription asset module adds the notion of asset to the sale subscription module.

Two fields are added to the *Service*:

- *Lots*: All the lots that can be used when providing this service - *Available Lots*: A subset of the preceding field displaying the available lots

On the *Subscription Line*, it is possible to specify the lot to use. When the subscription will be running this field will become required for service with lots.

On the *Lot*, the field *Subscribed* will point to the line of the subscription currently using this lot.