Defining NX Drawings (NX)
NX drawings are defined by one of the following three methods:
Setting the system parameter PTC_WM_IS_DRAWING
Using drawing layers
Using the file name
* 
Each of these methods is evaluated only up until the CAD document is created (that is, upon upload). If the name value of the attribute or the existence of the layer changes after the first upload, the drawing CAD document is still considered to be of the type, Drawing.
attribute (default)
layer
file name
The following sections describe each method:
Drawing Attribute Method
Drawing Layer Method
NX File Name Method
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