Context Data Object

Context Data Object Model

To be compliant with SENML

The Context model is comprised by two main types of Objects:

Context: contains data that characterises the environment around a certain reTHINK User (ie a human being or physical things) usualy derived from data collected from sensors.

Action: contains data used to perform actions on reTHINK physical things users

Context

A Context is defined by:

• id: context identifier
• unit: (optional) value of type ContextUnit that defines the unit used by Context.values.value[]. If a value does not contain a Unit value, then this Unit value is used. Otherwise the value found in the Context.values[].unit Unit (if any) is used.
• values: an array of type ContextValue where the last element contains the most updated value of the context.

ContextValue

A ContextValue is defined by:

• type: its the ResourceType of the value
• name: (optional) type ContextUnitName the display name of the unit used by value.
• unit: (optional) value of type ContextUnit that defines the unit used by value.
• value: measurement value as defined at unit.
• time: (optional) time of “instantaneous” measurement.
• startTime: (optional) starting time of measurement occurred in a certain period of time.
• endTime: (optional) ending time of measurement occurred in a certain period of time.
• updateTime: (optional) the last time the measurement was performed.
• expires: (optional) when the measurement value expires.