Chapter 1 -- DXF Format
Organization of This Reference
Formatting Conventions in This Reference
Each group code listed in this reference is presented by a numeric group code value and a description. All group codes can apply to DXF files, applications (AutoLISP or ObjectARX), or both. When the description of a code is different for applications and DXF files (or only applies to one or the other), the description is preceded by the following indicators:
APP Application-specific description
DXF DXF file-specific description
If the description is common to both DXF files and applications, no indicator is provided.
Optional codes are indicated as "optional" in the description.