<summary> Maximum amount of compression to apply to the side of the glyph. This may vary from 0 up to the glyph cluster size. </summary>
<summary> Maximum amount of expansion to apply to the side of the glyph. This may vary from 0 to infinity, being zero for fixed-size characters and connected scripts, and non-zero for discrete scripts, and non-zero for cursive scripts at expansion points. </summary>
<summary> Minimum amount of expansion to apply to the side of the glyph. This may vary from 0 to infinity, typically being zero except for kashida. </summary>
<summary> Justification information per glyph. </summary>