Group Code Value Types Reference (DXF)

Group codes define the type of the associated value as an integer, a floating-point number, or a string, according to the following table of group code ranges.

Group code value types
Code range	Group value type
0-9	String (with the introduction of extended symbol names in AutoCAD 2000, the 255-character limit has been increased to 2049 single-byte characters not including the newline at the end of the line)
10-39	Double precision 3D point value
40-59	Double-precision floating-point value
60-79	16-bit integer value
90-99	32-bit integer value
100	String (255-character maximum; less for Unicode strings)
102	String (255-character maximum; less for Unicode strings)
105	String representing hexadecimal (hex) handle value
110-119	Double precision floating-point value
120-129	Double precision floating-point value
130-139	Double precision floating-point value
140-149	Double precision scalar floating-point value
160-169	64-bit integer value
170-179	16-bit integer value
210-239	Double-precision floating-point value
270-279	16-bit integer value
280-289	16-bit integer value
290-299	Boolean flag value
300-309	Arbitrary text string
310-319	String representing hex value of binary chunk
320-329	String representing hex handle value
330-369	String representing hex object IDs
370-379	16-bit integer value
380-389	16-bit integer value
390-399	String representing hex handle value
400-409	16-bit integer value
410-419	String
420-429	32-bit integer value
430-439	String
440-449	32-bit integer value
450-459	Long
460-469	Double-precision floating-point value
470-479	String
480-481	String representing hex handle value
999	Comment (string)
1000-1009	String (same limits as indicated with 0-9 code range)
1010-1059	Double-precision floating-point value
1060-1070	16-bit integer value
1071	32-bit integer value