| --- |
| language: |
| - grc |
| license: other |
| task_categories: |
| - text-generation |
| - token-classification |
| tags: |
| - ancient-greek |
| - vowel-length |
| - macronization |
| - classics |
| pretty_name: OGA Macronized (Ancient Greek Vowel Length) |
| size_categories: |
| - 1M<n<10M |
| --- |
| |
| # OGA Macronized |
|
|
| Automatically macronized Ancient Greek text: the phonemic length of the three |
| "dichrona" (ambiguous-length letters) — alpha (α), iota (ι), upsilon (υ) — has |
| been marked wherever the [grc-macronizer](https://github.com/Urdatorn/grc-macronizer) |
| rule-based system could disambiguate it with confidence. A trailing `^` marks a |
| short dichronon, a trailing `_` marks a long one; dichrona the macronizer could |
| not resolve are left unmarked (never guessed). |
|
|
| ## Source |
|
|
| Text is the [Opera Graeca Adnotata](https://doi.org/10.5281/zenodo.14206061) |
| corpus (Celano 2024) — ~40M tokens of Ancient Greek aggregating First1KGreek, |
| the Patristic Text Archive, and Perseus' canonical-greekLit, with lemma/POS/ |
| morphology already annotated by Celano's own parser. That existing annotation |
| was converted directly into the macronizer's internal representation (bypassing |
| any separate NLP pipeline) and run through the rule-based macronizer. |
|
|
| - 2,234,599 sentences |
| - Overall dichrona-in-open-syllables macronization ratio: 69.20% |
| (11,627,591 / 16,802,080 disambiguated) |
|
|
| ## Fields |
|
|
| - `macronized`: the sentence with `^`/`_` markup, e.g. `χρὴ γι^νώσκειν ὅτι^ πά_σης τῆς γῆς` |
| - `plain`: the same sentence with markup stripped (i.e. ordinary Greek orthography) |
|
|
| ## Intended use |
|
|
| Training data for sequence models that predict Ancient Greek vowel length |
| (e.g. a char-level tagger), and as an intermediate resource for downstream |
| prosody-aware NLP (verse scansion, metrical classification, morphology |
| disambiguation of the dichrona-bearing minimal pairs like ἄν/ἂν). |
|
|
| Note: labels are *silver*, not gold — they come from a rule-based system that |
| is deliberately conservative (does not guess), not from human annotation. For |
| gold-standard evaluation, see |
| [Norma Syllabarum Graecarum](https://github.com/Urdatorn/norma-syllabarum-graecarum). |
|
|
| ## License |
|
|
| The underlying OGA corpus is distributed by its authors under the terms shown |
| on its [Zenodo record](https://doi.org/10.5281/zenodo.14206061); check that |
| record for the authoritative license before redistribution. The macronization |
| itself is produced by software licensed under GNU GPL v3 |
| ([grc-macronizer](https://github.com/Urdatorn/grc-macronizer)). |
|
|
| ## Citation |
|
|
| > Giuseppe G. A. Celano. Opera Graeca Adnotata: Building a 34M+ Token Multilayer Corpus for Ancient Greek. arXiv:2404.00739. |
|
|
| > Thörn Cleland, Albin and Eric Cullhed (forthcoming). Automatic Annotation of Ancient Greek Vowel Length. |
|
|
