comma = space* ',' space*;
colon = space* ':' space*;
-glyph_name = '"' (alnum+ >tok %parse_glyph) '"';
-glyph_number = (unum >tok %parse_gid);
+glyph_id = unum;
+glyph_name = alpha (alnum|'_'|'.'|'-')*;
-glyph = "\"g\"" colon (glyph_name | glyph_number);
+glyph_string = '"' (glyph_name >tok %parse_glyph) '"';
+glyph_number = (glyph_id >tok %parse_gid);
+
+glyph = "\"g\"" colon (glyph_string | glyph_number);
cluster = "\"cl\"" colon (unum >tok %parse_cluster);
xoffset = "\"dx\"" colon (num >tok %parse_x_offset);
yoffset = "\"dy\"" colon (num >tok %parse_y_offset);
unum = '0' | [1-9] digit*;
num = '-'? unum;
-glyph = alnum+ >tok %parse_glyph;
+glyph_id = unum;
+glyph_name = alpha (alnum|'_'|'.'|'-')*;
+
+glyph = (glyph_id | glyph_name) >tok %parse_glyph;
cluster = '=' (unum >tok %parse_cluster);
offsets = '@' (num >tok %parse_x_offset) ',' (num >tok %parse_y_offset );
advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?;