DIVAnnotation-lite is a a semi-automatic annotation tool for ancient
handwritten documents. As indicated by its name, it is based on
DIVAnnotation.

DIVAnnotation can be found at the following address:
https://github.com/DIVA-DIA/DivAnnotation
and is described in more details in
Seuret, M., Bouillon, M., Simistira, F., Würsch, M., Liwicki, M.,
& Ingold, R. (2018, April). A semi-automatized modular annotation tool
for ancient manuscript annotation. In 2018 13th IAPR International
Workshop on Document Analysis Systems (DAS) (pp. 340-344). IEEE.

The data is stored in a TEI file. Data from this file can be accessed with
any standard tool, including the Java library used by DIVAnnotation and
DIVAnnotation-lite:
https://github.com/DIVA-DIA/Tei-HisDoc