GDEF Header

The GDEF table begins with a header that consists of a version number (Version), initially set to 0x00010000, an offset to a table defining the types of glyphs in the font (GlyphClassDef), an offset to a list defining attachment points on the glyphs(AttachList), and an offset to a ligature caret list (LigCaretList).

Example 1 at the end of this chapter shows a GDEF Header table.

GDEF Header

Type	Name	Description
fixed32	Version	Version of the GDEF table
		—initially 0x00010000
Offset	GlyphClassDef	Offset to class definition table for glyph type
		—from beginning of GDEF header
Offset	AttachList	Offset to list of glyphs with attachment points
		—from beginning of GDEF header
Offset	LigCaretList	Offset to list of positioning points for ligature carets
		—from beginning of GDEF header