The `OrderedZone` and `ClassicFEZone` classes use the `FaceNeighbors` class to handle "global" face-neighbor connections from one zone to another. In PyTecplot, there are three zone class objects: `OrderedZone`, `ClassicFEZone` and `PolyFEZone`. The connectivity is implied in ordered zones and explicitly provided by the user for finite-element zones. Polytopal zones can have a varying number of faces and nodes for each element.
This means that each element has the same number of faces and nodes. Classic finite-element zones must use a fixed-type element throughout. Ordered zones are always considered to be logically-rectangular grids of one, two or three dimensions depending on the shape. Zones created as "ordered," "classic finite-element," or "polytopal finite-element" along with the number of nodes and elements which can not be changed (without creating a new zone). _Zones: Zones describe the size, shape, element (cell) geometry, connectivity and solution time of arrays in a dataset.
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