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Metatron is a manual annotation tool designed for biomedical literature. It is a collaborative and fully customizable tool that allows users to perform mentions, relationships, assertions, labels annotations, and concepts linking.
Metatron is publicly available at https://metatron.dei.unipd.it.
![](https://www.examode.eu/wp-content/uploads/2023/06/Screen-Shot-2023-06-01-at-17.17.16-1024x355.png)
A screenshot from the annotation interface of Metatron.