# 📚 ClassiCC-PT: Classified Common Crawl Corpus for Portuguese
## 📖 Overview
ClassiCC-PT (Classified Common Crawl – Portuguese) is a large-scale, high-quality web corpus containing ~120B Portuguese tokens extracted from Common Crawl snapshots. It is specifically curated for training large language models in Portuguese, with a focus on data quality, language specificity, and targeted filtering.
This corpus was created as part of a study on continued pretraining for adapting English-trained LLMs to Portuguese.
## 🏗 Dataset Construction
Source Snapshots: CC-2021-31, CC-2021-39, CC-2022-40
Steps:
Language Filtering
Selected only pages tagged with Portuguese in Common Crawl metadata (~2% of each CC crawl).
HTML to Text Extraction
Used Trafilatura to remove boilerplate and extract main content.
Deduplication
Applied MinHash intra-crawl deduplication (removing ~40% duplicates).
Neural-Based Filtering
Developed three BERTimbau-ba…
