Datasets:

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EmpiresOfMedievalWestAfrica

license: mit
task_categories:
  - text-generation
  - question-answering
language:
  - en
tags:
  - pdf2dataset
  - ocr
  - chunked
size_categories:
  - n<1K
configs:
  - config_name: default
    data_files:
      - split: train
        path: data/train-*
dataset_info:
  features:
    - name: chunk_id
      dtype: string
    - name: text
      dtype: string
    - name: text_clean
      dtype: string
    - name: chapter
      dtype: string
    - name: section
      dtype: string
    - name: subsection
      dtype: string
    - name: images
      list: image
    - name: image_refs
      list: string
    - name: num_images
      dtype: int64
    - name: has_images
      dtype: bool
    - name: source_filename
      dtype: string
    - name: start_index
      dtype: int64
    - name: char_count
      dtype: int64
  splits:
    - name: train
      num_bytes: 26302876
      num_examples: 419
  download_size: 25996981
  dataset_size: 26302876

EmpiresOfMedievalWestAfrica

Dataset created with PDF2Dataset -- OCR + structure-aware chunking pipeline.

Dataset Summary

Metric	Value
Total chunks	419
Avg chars/chunk	665
Avg images/chunk	0.10
Source files	1
Duplicates removed	0
Quality filtered	4

Schema

Column	Type	Description
`chunk_id`	`string`	Unique identifier: `filename_chunk_N`
`text`	`string`	Raw markdown chunk with image refs
`text_clean`	`string`	Cleaned text without markdown formatting
`chapter`	`string`	H1 header active at chunk position
`section`	`string`	H2 header active at chunk position
`subsection`	`string`	H3+ header active at chunk position
`images`	`list[string]`	Base64 image data for images in chunk
`image_refs`	`list[string]`	Image reference IDs in chunk text
`num_images`	`int`	Number of images in chunk
`has_images`	`bool`	Whether chunk contains images
`source_filename`	`string`	Original source file name
`start_index`	`int`	Character offset in source document
`char_count`	`int`	Character count of chunk text

Source Files

File	Chunks
`david_c._conrad_empires_of_medieval_west_africabook4me.org_.pdf`	419

Document Structure

Chapters found in the source documents:

A Changeable King
A Mix of Cultures
A World Famous Arma
Age Grade Societies
Askiya Muhammad the Great
BIBLIOGRAPHY
CONNECTIONS
CONTENTS
Empires of Medieval West Africa
Epilogue
Ethnic Groups of the Ghana, Mali, and Songhay Empires
HISTORY
INDEX
Introduction
Making the Best of Life
Mande Social Organization
Mansa Musa the Great
Mansa Musa's Pilgrimage
Modern Mali
Money Cowries
Moroccan Firearms
Muhammad and the Islamic Empire
Other Influences
RESOURCES: Books
RESOURCES: Web Sites
SOCIETY AND CULTURE
SOME MALI BASICS
Salt of the Sahara
Secret Sites
Sii Ali's Last Campaigns
... and 16 more

Pipeline

This dataset was processed through the PDF2Dataset pipeline:

OCR -- Mistral OCR extracts text and images from PDF/image files
Chunking -- Structure-aware recursive splitting preserves document hierarchy
Validation -- Schema validation ensures every chunk has required fields
Deduplication -- Content-hash based dedup removes identical chunks
Quality Filtering -- Removes empty, too-short, or malformed chunks