Thank you for the comment.
- if EAO is U, use the same representative glyph as in the (horizontal) code chart
When you say "use the same representative glyph as in the (horizontal) code chart" for U, does it allow slight design changes by horizontal/vertical, or does it force to use exactly the same glyph? Does it allow font designers to put different start/end brush shapes for vertical?
If you want to prohibit such design changes for U (I believe you were thinking so before if I didn't misunderstand,) I'd like to ask several code points to classify to T.
- if EAO is S or SB, rotate the representative glyph of the (horizontal) code chart 90 degree clockwise
From the description, S and SB are the exactly the same. What exactly the differences between the two are?
While reviewing S and SB, it's hard to say which value is correct without clear definitions. You know, there are code points that are hard to say "if it's a bracket" or not. Can you please consider clarifying more on these definitions?
one concern I have for T is that it doesn't indicate orientation at all
Correct, because it cannot.
- if EAO is T, get the representative glyph from section 5.4, table 3, column V.
For instance, U+301C or U+30FC in Table 3 are sideways + glyph change, while U+3041 or U+3300 are upright + glyph change. I would like to distinguish them, as it would help application layers to render better results without good supports in fonts.