A final-syllable (of a brivla) is a syllable without a stress mark, followed directly by spaces or by a lojban-word other than a cmene.
A stressed-syllable, a stressed-diphthong and a stressed-vowel are, respectively, a syllable, a diphthong and a vowel with a stress mark on the vowel or followed (possibly after an intervening y-syllable) by one syllable and then spaces.
An unstressed-syllable, an unstressed-diphthong and an unstressed-vowel are, respectively, a syllable, a diphthong and a vowel that are not stressed as described above.
The stress mark consists of a capital vowel (A, E, I, O, U). The relevant mark on a diphthong is the capitalization of the first vowel, and on a semi-consonant vowel pair the relevant mark is the capitalization the vowel. The capitalization of the other member of the pair is ignored.
A syllable consists of an onset followed by a nucleus that does not contain y. A digit can also stand for the syllable that corresponds to its name.
A y-syllable consists of an onset followed by a single y.
A nucleus consists of a diphthong, a semi-consonant followed by a vowel or y, a single vowel or a single y, not followed by y, and then it can end in an apostrophe (h).
A semi-consonant is i or u when followed by a vowel.
A diphthong is one of ai, au, ei, oi
A vowel is one of a, e, i, o, u, where a, e, and o cannot be followed by y.
y cannot be followed directly by a vowel.
The apostrophe, or h, must always be followed by a vowel or y.