This standard defines recommended practices for designing smart agriculture data focusing on the data format, data tags, their naming rules, and data transfers to show the unified practices of data expression, exchange, and processing. This is indispensable for smart agriculture systems, such as data acquisition, data management, data service provisioning, and data processing for data security, as well as privacy from the perspective of agricultural machinery control, greenhouse management, and farming management. This recommended practice provides the co-existence and interoperability using common data structure and transfer between heterogeneous systems; namely, various systems of different manufacturers work together to achieve the farmers' requirement efficiently and effectively as for a smart agriculture system.