# Tree information

There are three kinds of features that define the model tree

- Feature Node (kA3DFamily_Root-kA3DFRMRoot_Node)This type of feature corresponds to a simple node in the tree, with the following structure
- Feature Package (kA3DFamily_Root-kA3DFRMRoot_Package)This node will embed multiple feature definition, to define in one time several feature with the same cad file.
- It’s the case of multi-pad, with the possibility to have different depth size. |
- Another example, a feature that define multiple hole at different positions. |
- Feature Container (kA3DFamily_Root-kA3DFRMRoot_Container)This type of feature corresponds to a sub tree. Underneath, a parameter with typekA3DParameterType_Containerthat regroup all sub nodes.

Enumerations

- `A3DEFRMRoot`

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