AutoCAD drawing database (DWG) can contain various types of anonymous (unnamed) blocks. The pseudo-names of anonymous blocks always start with an asterisk "*". You normally cannot use AutoCAD block editing commands with anonymous blocks.
Examples of anonymous blocks:
* *U### - general anonymous blocks
* *E### - anonymous blocks from non-uniformly scaled blocks - when exploded (e.g.
solids, regions)
* *D### - anonymous dimensions (dim blocks)
* *X### - anonymous hatches (hatch blocks)
* *A### - anonymous groups
* *T### - anonymous blocks in tables
AutoCAD add-on applications may create also other types of anonymous blocks.
Examples of anonymous blocks:
* *U### - general anonymous blocks
* *E### - anonymous blocks from non-uniformly scaled blocks - when exploded (e.g.
solids, regions)
* *D### - anonymous dimensions (dim blocks)
* *X### - anonymous hatches (hatch blocks)
* *A### - anonymous groups
* *T### - anonymous blocks in tables
AutoCAD add-on applications may create also other types of anonymous blocks.
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