MLINESTYLE (DXF)

The following group codes are used by MLINESTYLE objects.

MLINESTYLE group codes
Group code	Description
0	Object name (MLINESTYLE)
5	Handle
102	Start of persistent reactors group; always “{ACAD_REACTORS” (persistent reactors group appears in all dictionaries except the main dictionary)
330	Soft-pointer ID/handle to owner dictionary. For MLINESTYLE objects this is always the ACAD_MLINESTYLE entry of the named object dictionary
102	End of persistent reactors group; always “}”
100	Subclass marker (AcDbMlineStyle)
2	Mline style name
70	Flags (bit-coded): 1 =Fill on 2 = Display miters 16 = Start square end (line) cap 32 = Start inner arcs cap 64 = Start round (outer arcs) cap 256 = End square (line) cap 512 = End inner arcs cap 1024 = End round (outer arcs) cap
3	Style description (string, 255 characters maximum)
62	Fill color (integer, default = 256)
51	Start angle (real, default is 90 degrees)
52	End angle (real, default is 90 degrees)
71	Number of elements
49	Element offset (real, no default). Multiple entries can exist; one entry for each element
62	Element color (integer, default = 0). Multiple entries can exist; one entry for each element
6	Element linetype (string, default = BYLAYER). Multiple entries can exist; one entry for each element

The 2 group codes in mline entities and MLINESTYLE objects are redundant fields. These groups should not be modified under any circumstances, although it is safe to read them and use their values. The correct fields to modify are

Mline: The 340 group in the same object, which indicates the proper MLINESTYLE object.
Mlinestyle: The 3 group value in the MLINESTYLE dictionary, which precedes the 350 group that has the handle or entity name of the current mlinestyle.