The letters

After stating its system in brief, the 1446 book slowed down and walked the letters one class at a time (the initial consonants, the vowels, the final consonants), each class explained by the same method.

This part does the same for gog’s letters. The marks are the consonants: visible forms that are silent until a position gives them somewhere to stand. The positions are the vowels: x, y, and z, plus the scales that decide how a number, a category, or a date becomes a place on an axis. The refining channels are the finals: color, size, shape, pattern, opacity. Optional, and each earns the legend that decodes it. group sits outside both classes: it splits a mark without encoding anything, so it earns no key, and is closer to the space between words. Around the letters sit three pieces that complete a layer. The table you bind once opens this part, because nothing can be drawn until a table is named. The transforms that derive new statements from a mark close it, together with the line between mapping a column and setting a constant.

The mark chapters follow one template: what it draws, what it requires, what refines it, what derives from it, what you can set on it, and what it refuses. The last two are always the last two, under those names. That sameness is the point: it is the No Exceptions law applied to a book’s structure, and it means learning the second mark is faster than the first, and the fifth is nearly free.