DXF, drawing interchange format, or drawing exchange format, is a tagged data representation of AutoCAD drawing file. Each element in the file has a prefix integer number called a group code. This group code actually represents the element that follows and indicates the meaning of a data element for a given object type. DXF makes it possible to represent almost all user-specified information in a drawing file.
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A file with .usd extension is a universal scene description file format that encodes data for the purpose of data interchanging and augmenting between digital content creation applications.
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