If unique identifier is given, part status is for that individual. If group identifier is given without a unique identifier, then the status is assumed to be for the whole group.
identifier of the «abstract» Composition entity defined in the MTConnectDevices Response Documentresponse document published by an MTConnect Agent in response to a probe request. associated with the data reported for the Observation.
::dataItemIdMUST match the ::id attribute of the DataItem defined in the MTConnectDevices Response Documentresponse document published by an MTConnect Agent in response to a probe request..
::nameMUST match the ::name attribute of the DataItem defined in the MTConnectDevices Response Documentresponse document published by an MTConnect Agent in response to a probe request..
number representing the sequential position of an occurrence of an observationobserved value of a property at a point in time. in the data buffer of an agentsoftware that collects data published from one or more piece(s) of equipment, organizes that data in a structured manner, and responds to requests for data from client software systems by providing a structured response in the form of a response document that is constructed using the semantic data model of a Standard. .
::sequenceMUST have a value represented as an unsigned 64-bit value from 1 to \(2^{64}-1\).
::subTypeMUST match the ::subType attribute of the DataItem defined in the MTConnectDevices Response Documentresponse document published by an MTConnect Agent in response to a probe request..
::typeMUST match the ::type attribute of the DataItem defined in the MTConnectDevices Response Documentresponse document published by an MTConnect Agent in response to a probe request..
::unitsMUST match the ::units attribute of the DataItem defined in the MTConnectDevices Response Documentresponse document published by an MTConnect Agent in response to a probe request..
> Note 2 to entry: In *JSON*, when `isUnavailable` is `true`, the *JSON* `value` of the `Observation` **MUST** be `UNAVAILABLE`.
```json
"Execution" : [ { "dataItemId": "..." ..., "value": "UNAVAILABLE" } ]
observationobserved value of a property at a point in time. of the Observation entity.
The default value type for ::result is string.
Note 1 to entry: in XML the Observation::result is the CDATA of the Observation elementconstituent part or a basic unit of identifiable and definable data. ```xml
<Execution dataItemId=”…” …>READY</Execution>
> Note 2 to entry: in *JSON* the [`Observation::result`](/Version2.2/AgentArchitecture/InformationModel/Observation/#result) is the member `value` of the Observation object
```json
"Execution" : [ { "dataItemId": "..." ..., "value": "READY" } ]
identifies when a reported value has been reset and what has caused that reset to occur for those DataItem entities that may be periodically reset to an initial value.
::resetTriggeredMUST only be provided for the specific occurrence of a DataItem reported in the MTConnectStreams Response Documentresponse document published by an MTConnect Agent in response to a current request or a sample request. when the reset occurred.