A hierarchical database engine with read-only access to data, ideally used for cross-application settings and infrastructure description.
Trust is a read-only hierarchical database with data stored in JSON format and served locally or through REST.
The detailed documentation of Trust database is available on the official website. It also contains an online tool which let you test different queries and parameters.
If you want to have SVN access to the official repository in order to contribute to the project, contact me at firstname.lastname@example.org. If you find it more convinient to clone the source to GitHub, you can do that too.