Brackit seems to be similar to OctoSQL in some ways, but probably more for semi-structured data as for instance XML and JSON, while querying with XQuery instead

Brackit seems to be similar to OctoSQL in some ways, but probably more for semi-structured data as for instance XML and JSON, while querying with XQuery instead of SQL: http://wwwlgis.informatik.uni-kl.de/cms/dbis/projects/brackit/mission/ http://wwwlgis.informatik.uni-kl.de/cms/dbis/projects/bracki... The project itself (http://brackit.org http://brackit.org) might not be further developed by Dr. Sebastian Baechle and his students under supervision from Dr. Dr. Theo Härder (invented transactions / ACID semantics), but I'm maintaining a fork with a lot of JSON processing enhancements and time travel query additions: https://github.com/sirixdb/brackit https://github.com/sirixdb/brackit I'd love to refactor main parts of the query processor and to port it to Kotlin. However, as always it would be amazing to get help :-) Research possibilities are almost endless of course, especially regarding distributed query processing with Fink or Kafka, looking into how best to support concurrent operations... Publications: Separating Key Concerns in Query Processing - Set Orientation, Physical Data Independence, and Parallelism: http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publications/2013/Dissertation-Baechle.pdf http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publicatio... XQuery Processing over NoSQL Stores: http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publications/2013/ValerGvD2013.pdf http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publicatio... BrackitMR: Flexible XQuery Processing in MapReduce: http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publications/2013/WAIM2013.pdf http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publicatio... Unleashing XQuery for Data-independent Programming: http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publications/2014/Unleash.2014.pdf http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publicatio... Versatile XQuery Processing in MapReduce: http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publications/2013/ADBIS.2013.final.pdf http://wwwlgis.informatik.uni-kl.de/cms/fileadmin/publicatio...