In this article, the beta version 0.1.0 of Opera Graeca Adnotata (OGA), the largest open-access multilayer corpus for Ancient Greek (AG) is presented. OGA consists of 1,687 literary works and 34M+ tokens coming from the PerseusDL and OpenGreekAndLatin GitHub repositories, which host AG texts ranging from about 800 BCE to about 250 CE. The texts have been enriched with seven annotation layers: (i) tokenization layer; (ii) sentence segmentation layer; (iii) lemmatization layer; (iv) morphological layer; (v) dependency layer; (vi) dependency function layer; (vii) Canonical Text Services (CTS) citation layer. The creation of each layer is described by highlighting the main technical and annotation-related issues encountered. Tokenization, sentence segmentation, and CTS citation are performed by rule-based algorithms, while morphosyntactic annotation is the output of the COMBO parser trained on the data of the Ancient Greek Dependency Treebank. For the sake of scalability and reusability, the corpus is released in the standoff formats PAULA XML and its offspring LAULA XML.

Opera Graeca Adnotata (OGA) 是最大的开放获取多层次古希腊语语料库，提供了1,687个文学作品和超过34M个标记，这些作品来自于PerseusDL和OpenGreekAndLatin GitHub资料库。该语料库中的文本经过七个注释层的丰富，包括了分词、句子分割、词形和句法等多个层次的注释，同时以PAULA XML和LAULA XML格式发布，以提高可扩展性和可重复使用性。

古希腊语——Opera Graeca Adnotata的34M+令牌多层语料库构建