The relevant part of the CLL for lerfu-forming cmavo is chapter 17, specifically, sections 3, 5, 6, 7 and 14. I find no internal contradictions in the text, and its completeness is satisfactory, except for a small concern about alphabet and font shifts, which I will return to shortly.

The words in this paradigm has seen almost no use outside the language definition materials. This probably is because they are related to spelling, which is a predominantly oral activity. (Finding occurrences of "aitch" in an English corpus this small would probably give similar results.) It is perhaps worth mentioning that I discovered the members of LAU, TEI and FOI on a Wiki page titled "Cmavo that are a ghastly waste of precious monosyllabic cmavo space"...

However, I'm happy to report that "boi" is being used, and always correctly. Some examples:

http://www.lojban.org/texts/translations/alice/alice_7.html
http://www.lojban.org/texts/translations/alice/alice_9.html

The Book does not say explicitly how far the alphabet shift (zai and friends) and the font shift lasts. Presumably, it must last for more than one letter, because of the existence of the font-and-alphabet shift cancelling cmavo "na'a" (p 418), and the illustration on p 412 ("zai xanlerfu bu ly .obu jy by .abu ny.").

Since there is a possibillity of specifying categories such as font face and text size separately (according to examples 5.5 - 5.7), I have assumed that the intention is for the ce'a shift to take effect until another ce'a shift is applied to the same category. My cmavo definition of ce'a reflects that. I will leave it to the shepherd of BY to take care of the other cmavo that act similarly.

Proposed dictionary entries

boi

Terminates a letteral sequence or a numeral.

bu

Combines with the previous word to make a Lojban letteral, provided that it is not one of the quote cmavo (ZO, ZOI, LOhU, LEhU) or one of the erasure cmavo (SI, SA, SU), ZEI, BAhE, or FAhO. If the aforementioned previous word is already a letteral, the resulting letteral will not necessarily be the same, for instance, "ky. bu" != "ky". In addition to single words, bu can be combined with a letteral that is already a composite of a word+bu.

ce'a

Converts the following lerfu to a font change letteral; font changes effect every letteral after them in the letteral sequence. More than one can be in effect at a time, but if two directly contradict each other, only the latest one applies.

foi

Marks the end of a combination letteral; the resulting letteral is some unspecified (lexically defined) combination of all the enclosed letterals.

lau

Converts the following letteral to punctuation.

tau

Converts the following letteral to uppercase.

tei

Marks the beginning of a combination letteral; the resulting letteral is some unspecified (lexically defined) combination of all the enclosed letterals.

zai

Marks the following letteral as an alphabet shift.

Proposed keywords

boi

end letteral. end numeral

bu

sign. character. symbol.

ce'a

change font to. in font.

foi

characters joined together

lau

punctuation symbol. punctuation sign.

tau

uppercase.

tei

character composed of

zai

change alphabet to. in alphabet.

Omission of unused cmavo

Given that Lojban does not seem to be intended for holding multilingual spelling bees, and that a dictionary containing many unused cmavo with bizarre functions could confuse learners of the language, the BPFK does not recommend to include the alphabet shift zai in learning materials intended even for advanced learners. The cmavo should not be reassigned to have other meanings, however.

Overall changes

This proposal entails the following changes:

• Codify that letteral shifts last indefinitely or until superseded by another shift in the same category.
• Replace old definitions with new ones (see above)
• Add new keywords (see above)

Impact

It is my opinion that these changes are mere clarifications, and will not impact or invalidate usage, current or past. It also appears to agree with the letter shifts in BPFK Section: Lerfu Shifts.