Haystack project is an open source initiative to standardize semantic data models for Internet Of Things. It enables interoperability between any IoT data producer and consumer, mainly in the Smart Building area.
Haystack core data model is the Grid, it can be serialized in many formats, mainly Zinc, Trio, Json and Csv
This project implements client side haystack code. Useful to parse or dump Haystack files (Zinc, Trio, Json, Csv).
On the server side, it also implements Haystack Rest API, useful to serve Haystack data you host.
The full documentation is here and the documentation of API is here