From FreeCAD Documentation
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0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z (Top)
- Name
- An unique identifier for a FreeCAD document object. Once assigned by the program, the Name can not be easily changed. Contrast with Label.
- Non-manifold
- Non-manifold topology, also called zero-thickness, is two distinct solid bodies connected at a theoretical vertex or edge. It is an unsupported type of shape (not always detected by FreeCAD) that should be avoided, as it can cause trouble with further steps and export.
- Null Shape
- A Shape property that has not been initialized by a program/macro. Usually an error condition.