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license: apache-2.0
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# Inverted Index Dataset

This dataset contains the **inverted index** part of the manuscript.  
The original data was stored as JSON files and has been **compressed into a ZIP archive** for upload and distribution.

The inverted index maps **words** (obtained by tokenizing chart descriptions) to the **images in which they appear** and the **frequency of occurrence** in each image.

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## Data Format

Each JSON file stores an inverted index with the following logical structure:

* **Word**
  * **Specific image location** (relative image path)
    * **Frequency** (number of times the word appears in that image)

Conceptually, the structure can be represented as:

```json
{
  "<word_1>": {
    "<image_location_1>": <frequency>,
    "<image_location_2>": <frequency>
  },
  "<word_2>": {
    "<image_location_3>": <frequency>
  }
}