Importing models

One of the purposes of Oneil’s models is to be able to represent collections of systems and subsystems. To this end, Oneil provides two different ways to import a model.

The first way to import a model is as a reference. When a model is imported as a reference, all of the reference model parameters are made available through the reference alias. The reference alias is either the alias provided or, if there isn’t one, the name of the model.

# constants.on
Gravity of Earth: g = 9.8 :m/s^2

# box.on
Mass of box: m_b = 5 :kg

# reference with alias
ref constants as c
Weight of box: w_b = m_b * g.c :N

# box2.on
Mass of box: m_b = 5 :kg

# reference without alias
ref constants
Weight of box: w_b = m_b * g.constants :N

The second way to import a model is as a submodel. Like with a reference, all of the submodel parameters are available through the submodel alias. In addition to this, the model is also exported as a submodel of the current model. This means that the imported model can be referenced as model.submodel.

# radar.on
Radar cost: cost = 1000 :$

# solar_panel.on
Solar panel cost: cost = 500 :$

# satellite.on
use radar
use solar_panel as solar

Satellite cost: cost = cost.radar + cost.solar :$

# product.on
use satellite
ref satellite.radar
ref satellite.solar_panel as solar
# ... or using `with` syntax ...
use satellite with [radar, solar_panel as solar]

Note that in the case of a submodel, the submodel and reference name may be different. If an alias is provided, it will be used as the reference name, but not as the submodel name. The submodel name will always be the name of the model.