TaxiHub is an upcoming project provides a place to share and distribute taxonomies across your organisation.
Taxi Hub is entirely optional, and not required for use of taxi.
The code is available here.
Taxi Hub is a developing project. The code is being made visible to provide visibility into it's development, and allow organsiations to download and use early-access versions of it.
However, Taxi Hub should be considered "Source Visible", and not "Open Source". We will revisit and clarify licensing of Taxi Hub at a later date.