AUTOCAD EXCHANGE COMS DRAWIT CODE
An important "variable" in the header is the code used to identify the DWG format version (see File type signifiers below). Header: This section always comes first in the DXF file.See an outline example of an OBJECTS section in a DXF file at Object Group Codes in DXF Files.
Within sections there may be sub-sections (and sub-sub-sections) that are introduced by a group with code 0 and text value indicating the type of information following. Sections end with a group with code 0 and value "ENDSEC". Each section starts with a group with code 0 and value "SECTION", which is usually followed by a group with code 2 and a string value that identifies the section.
Groups (of two lines each) in a DXF file are organized into sections. In other cases, a group code is associated with a generic function for example, group codes 290-299 are used for boolean flags. In a few cases the semantics are relatively specific for example, the value associated with group code 10 is the X-coordinate of a "Primary point this is the start point of a line or text entity, center of a circle, and so on." Group codes 20 and 30 are used for the Y- and Z-coordinates. For the semantics associated with each group code, see DXF Group Codes in Numerical Order Reference. See Group Code Value Types Reference (DXF). Each group code is associated with a data type (e.g., integer, text string, floating point) for its values. A simple, but unofficial, introduction to the DXF format, including a graphic of an annotated sample file is at DXF File Specification, from Scan2CAD. Line of the group is the group value, in a format which depends on the group code. Which is an integer, usually a positive integer, with zero and small negative integers having special significance. The first line of a group is a group code, The structure of a DXF file is a sequence of "groups," each of which occupies See Notes below, for more information about the chronological versions of the AutoCAD application and associated versions of the DXF format. The simple tagged structure of the format has not changed, but the set of codes that identify the entries in the file has been extended over time. The compilers of this resource have chosen to describe the DXF ASCII format variants in a single document for the format family.
AUTOCAD EXCHANGE COMS DRAWIT PDF
The DXF Reference documentation is available through AutoCAD Help and DXF References on the AutoDesk Developer Network has links to documentation, mainly as PDF files, back to 1994 (Release 12).Īs of November 2016, PRONOM has identified 19 chronological versions. The documentation was first released in 1982, and has been updated frequently as the AutoCAD product has been enhanced. The DXF format specification is maintained and has been openly published by AutoDesk. A DXF_ASCII file is an ASCII text file a binary version of DXF has also been defined, but is less widely used and not described separately in this resource. AutoCAD Drawing Interchange File (DXF), ASCII FamilyĭXF is an exchange format for content of AutoCAD Drawing Files ( DWG).
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