UNDERLAYDEFINITION (DXF)

The following group codes apply to UNDERLAYDEFINITION symbol table entries.

UNDERLAYDEFINITION group codes
Group Code	Description
0	Object name (UNDERLAYDEFINITION)
5	Handle
102	Start of persistent reactors group; always “{ACAD_REACTORS”
330	Soft-pointer ID/handle to owner dictionary
102	End of persistent reactors group, always “}”
100	Subclass marker (AcDbUnderlayDefinition)
1	Underlay path and file name
2	Underlay Name