README.md

Dataset Card: finepdfs-cy-errors

Description

This dataset contains Welsh-language text extracted from PDFs using rolmOCR, with automated spelling and grammar error annotations generated by Cysill (the Welsh spell checker). The dataset is derived from the Welsh (cym_Latn) subset of HuggingFaceFW/finepdfs, filtered to include only documents processed with the rolmOCR extractor.

Dataset Statistics

Corpus Size

• Total number of words: 1,575,836
• Total number of errors found with Cysill: 73,574
• Number of documents: 183
• Average words per document: 8611.13
• Average errors per document: 402.04

Processing Details

• Source dataset: HuggingFaceFW/finepdfs (cym_Latn subset, test split)
• Extractor filter: rolmOCR only
• Spell checker: Cysill v2 API
• Language: Welsh (Cymraeg)

Fields

• text: The extracted text content from the PDF
• cysill_errors: List of error objects returned by Cysill API
• cysill_errors_count: Number of errors detected in the text
• (Additional fields inherited from finepdfs dataset)

Processing Configuration

• Cysill API configuration:
  • Format: text
  • Language: cy (Welsh)
  • Max errors per chunk: 1000
  • Accept English: true
  • Chunk size: 50,000 characters (split by paragraphs)

Usage

This dataset can be used for:

• Evaluating OCR quality for Welsh-language documents
• Analyzing common spelling and grammar errors in Welsh text
• Training or evaluating spell-checking and grammar-checking models for Welsh
• Assessing the quality of PDF text extraction methods

Hub Location

techiaith/finepdfs-cy-errors