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REDTab: A relation extraction dataset for knowledge extraction from web tables

Siffi Singh, Alham Fikri Aji, Gaurav Singh, Christos Christodoulopoulos
2022
Last updated April 2, 2024
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This repository hosts the REDTab dataset, the largest natural-table relation extraction dataset. In our dataset, we have a total of 9,149 tables, and 22,236 column pairs from Music and Literature domains. We release two categories of REDTab:

  • REDTab-standard: This is the standard REDTab which includes 23 different relations.
  • REDTab-simple: This is a filtered version which only focuses on the top 10 most popular relations.

Data Format

Table Format
The table data can be found in Tables folder. The tables in this dataset are in .json format and taken from WDC web-tables (http://webdatacommons.org/).

Annotation Format
The annotated data can be found in REDTab-standard or REDTab-simple, depending on the category. In each folder, the data is in .csv format, divided into train and test split.

Each row represents a column-pair relation annotation in a format of:

Left, Relation, Right, L_id, R_id, Table

Left: contains the header for one of the column in the column pair. It is called 'Left' because the header is placed to the left of the relation name.
Relation: contains the annotated relation between the column pair.
Right: contains the header for one of the column in the column pair. It is called 'Right' because the header is placed to the right of the relation name.
L_id: The index of the Left column header in the table.
R_id: The index of the Right column header in the table.
Table: The filename of the table. The {filename}.json can be found in Tables/ folder

Note: Either one of the L_id or R_id is the index of the main column which be referred in keyColumnIndex in the table file present in Tables/ folder.

For example:

Author, is the author of, Attachment Name, 5, 1, 6c1f39b3-b060-4970-81ec-5a15c7c71583.json

This row explains that in a table from Tables/6c1f39b3-b060-4970-81ec-5a15c7c71583.json, the 5th column (header name is Author) is the author of the 1st column (header name is Attachment Name).

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