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DXF File Structure — Ezdxf 0.10.1 Documentation

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dxf file

A DXF File is simply an ASCII textual content file with a file sort of .dxf and special formatted textual content. The essential file structure are DXF tags, a DXF tag consist of a DXF group code as an integer worth on its own line and a the DXF worth on the following line. Within the ezdxf documentation DXF tags might be written as (group code, worth). I know there exists a binary DXF format, however it appears that evidently it's not typically used and for lowering file measurement, zipping is much more environment friendly. ezdxf does not help binary encoded DXF information (yet?).

See additionally
For more details about DXF tags see: DXF Tags

A regular DXF file is organized in sections, starting with the DXF tag (0, ‘SECTION’) and ending with the DXF tag (0, ‘ENDSEC’). The (0, ‘EOF’) tag indicators the top of file.

HEADER: dxf file info concerning the drawing is found in this part of the DXF file. Each parameter has a variable identify beginning with ‘$’ and an associated value. Has to be the primary part. Classes: Holds the data for utility outlined courses. (DXF R13 and later) TABLES:: Contains a number of tables for model and property definitions.- Linetype desk (LTYPE) - Layer table (LAYER) - Text Style table (Style) - View desk (VIEW): (IMHO) layout of the CAD working space, solely interesting for interactive CAD functions - Viewport configuration desk (VPORT): The VPORT table is unique in that it may contain several entries with the same title (indicating a a number of-viewport configuration). The entries corresponding to the active viewport configuration all have the name *Active. The first such entry describes the current viewport. - Dimension Style table (DIMSTYLE) - User Coordinate System table (UCS) (IMHO) only attention-grabbing for interactive CAD purposes - Application Identification desk (APPID): Table of names for all applications registered with a drawing. - Block Record table (BLOCK_Record) (DXF R13 and Later)

BLOCKS: Contains all block definitions. The block name *Model_Space or *Model_Space is reserved for the drawing modelspace and the block identify *Paper_Space or *PAPER_Space is reserved for the energetic paperspace format. Both block definitions are empty, the content of the modelspace and the active paperspace is saved within the ENTITIES section. The entities of other layouts are saved in particular block definitions called *Paper_Spacennn, nnn is an arbitrary but distinctive quantity. ENTITIES: Contains all graphical entities of the modelspace and the energetic paperspace format. Entities of other layouts are stored in the BLOCKS sections.
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on Jan 14, 20