The team created the guide and then forget to develop the rest of the project, its really that simple. Because thats the only thing found on there website nothing like info about project development or anyother useful info.
CATA's Metadata Engine, Minerva, is released now! thats why its sai to read the document section carefully to avoid such confusions.
Minerva is the core component of CATA project.
https://cata-1.gitbook.io/cata-docs/