where <tag> is the geometry’s tag (an identifier of your choice), and
sDim is its space dimension (1, 2, or 3).
The geometry is added to the last created model component. If no model component exists in the model, a model component node tagged comp1 is automatically created for you. A physics interface using the geometry must belong to the same model component as the geometry.
where <ctag> is the tag of a component node.