anonymous-stoicheia/Stoicheia-meter-silver

Stoicheia meter silver

Training data behind Stoicheia-meter (macronization + scansion) and Stoicheia-macronizer. Every label is silver: produced by rule, by constraint solving, or converted from published markup — none of it is hand-annotated. The hand-annotated evaluation benchmark is Norma, in a separate repository.

Splits

There is no gold/silver ambiguity about what is train and what is held out. The training code (meter/encode.py, meter/train.py in the code repository) reads these files as follows.

role	files	lines
train — verse macronization	hypotactic.tsv, drama_ia6.tsv, drama_ia6_tet.tsv, anthology.tsv, nonnus_quintus.tsv, babrius_chol.tsv, theocritus_doric.tsv, theocritus_other.tsv, sweep1_hex.tsv, sweep1_ia6.tsv, sweep1_eleg.tsv	176,573 after screening
train — prose macronization	oga_0.tsv … oga_3.tsv (150,000 sampled per epoch)	1,625,256 after screening
train — scansion	scanner/corpus_v3.tsv, minus the dev and test works below	66,455 after screening, split by work
validation — macronization	dev.tsv (= dev.txt with the plain column added), Aristophanic verses	764 (718 encodable)
validation — scansion	works odyssey9, isthmians, seven inside scanner/corpus_v3.tsv	—
test — scansion	works iliad22, pythians, persians, theognis inside scanner/corpus_v3.tsv	—
test — macronization	not here: the norma benchmark	—

sweep1_chol.tsv is byte-identical to babrius_chol.tsv and is skipped by the trainer; oga_replay_15k.tsv and oga_replay_60k.tsv are earlier subsamples of the OGA prose, kept for provenance and unused by the released recipe.

Leakage screen. Before encoding, any training line is dropped if a 20-letter shingle of it occurs in Norma (both tasks, dev and test) or in dev.tsv; short eval lines are matched exactly. The screen removed 1,794 lines and is deliberately over-eager — dropping a few extra silver lines is free, leakage is not.

Format

Macronization TSVs are two headerless columns, plain and marked:

χρὴ γινώσκειν ὅτι πάσης τῆς γῆς	χρὴ γι^νώσκειν ὅτι^ πά_σης τῆς γῆς

^ marks a short vowel, _ a long one, and only after an ambiguous bare α/ι/υ: a vowel with a circumflex or iota subscript, or inside a diphthong, has its length fixed by the orthography and is left unmarked. An unmarked ambiguous vowel is an abstention, not a claim of shortness.

The scanner corpus is three headerless columns — work, metre, bracketed verse — where […] is a heavy syllable and {…} a light one:

semonides	iambic trimeter (tragic)	[ὦ] [παῖ] {τέ}[λος] [μὲν] [Ζεὺ]{ς ἔ}[χει] {βα}[ρύκ]{τυ}[πος]

How the labels were produced

1. Converted syllable-weight markup (hypotactic.tsv) from Hypotactic, turned into vowel lengths wherever an open, coda-less syllable's weight determines its nucleus.
2. Constraint-solver mining (the remaining verse TSVs and scanner/corpus_v3.tsv) of raw digitized verse: each candidate metre (hexameter, iambic trimeter and tetrameter, choliambic, elegiac couplets, trochaic and anapaestic tetrameter) is encoded as a finite-state grammar over syllable weights. A line is accepted only if exactly one grammar scans it, and a dichronon's length is fixed only when every accepting parse agrees — exact constraint propagation, not a model's guess.
3. Rule-based macronization (oga_*.tsv) of the Opera Graeca Adnotata prose with the dictionary-and-morphology system of the prior rule-based system, which abstains where its evidence is inconclusive rather than guessing. Prose cannot be scanned, so this is the only route to labels outside verse; it is also the silver that the 0.87M-parameter character transformer of that same paper — the baseline our macronization results are compared against — was trained on.

Licence CC-BY-SA-4.0, following Hypotactic and OGA.