Chapter 6 -- ENTITIES Section
Common Group Codes for Entities

The following table shows group codes that apply to virtually all graphical objects. Some of the group codes shown here are included with an entity definition only if the entity has nondefault values for the property. When you refer to the group codes by entity type, the lists of codes associated with specific entities, keep in mind that the codes shown here are also present.

NOTE Do not write programs that rely on the order shown in these DXF code tables. Although these tables show the order of group codes as they usually appear, the order can change under certain conditions or may be changed in a future AutoCAD® release. The code that controls an entity should be driven by a case (switch) or a table so that it can process each group correctly even if the order is unexpected.

When a group is omitted, its default value upon input (when using OPEN) is indicated in the third column. If the value of a group code is equal to the default, it is omitted upon output (when using SAVEAS). For information about abbreviations and formatting used in this table, see "Formatting Conventions in This Reference."

Group codes that apply to all graphical objects

Group code

Description
If omitted,
defaults to...

-1

APP: entity name (changes each time a  drawing is opened)

not omitted

0

Entity type

not omitted

5

Handle

not omitted

102

Start of application defined group
"{application_name"  (optional)

no default

application-defined codes


Codes and values within the 102 groups are application-defined  (optional)

no default

102

End of group, "}"  (optional)

no default

102

"{ACAD_REACTORS" indicates the start of the AutoCAD persistent reactors group. This group exists only if persistent reactors have been attached to this object  (optional).

no default

330

Soft pointer ID/handle to owner dictionary  (optional)

no default

102

End of group, "}"  (optional)

no default

102

"{ACAD_XDICTIONARY" indicates the start of an extension dictionary group. This group exists only if persistent reactors have been attached to this object  (optional).

no default

360

Hard owner ID/handle to owner dictionary  (optional)

no default

102

End of group, "}"  (optional)

no default

330

Soft-pointer ID/handle to owner BLOCK_RECORD object

not omitted

100

Subclass marker (AcDbEntity)

not omitted

67

Absent or zero indicates entity is in model space. 1 indicates entity is in paper space (optional).

0

410

APP: layout tab name

not omitted

8

Layer name

not omitted

6

Linetype name (present if not BYLAYER). The special name BYBLOCK indicates a floating linetype (optional).

BYLAYER

62

Color number (present if not BYLAYER); zero indicates the BYBLOCK (floating) color; 256 indicates BYLAYER; a negative value indicates that the layer is turned off (optional).

BYLAYER

48

Linetype scale (optional)

1.0

60

Object visibility (optional):
0 = Visible, 1 = Invisible

0

92

The number of bytes in the image (and subsequent binary chunk records) (optional)

no default

310

Preview image data (multiple lines; 256 charaters max. per line) (optional)

no default