SenML is defined by a data model for measurements and simple meta-
data about measurements and devices. The data is structured as a
single object (with attributes) that contains an array of entries.
Each entry is an object that has attributes such as a unique
identifier for the sensor, the time the measurement was made, and the
current value. Serializations for this data model are defined for
JSON [RFC4627], XML and Efficient XML Interchange (EXI)
[W3C.REC-exi-20110310].