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Table of Contents

> History object

The following objects are directly related to the history API.

History objects differ depending on the item's type of information. They are created by the ��Ĳ� server and cannot be modified via the API.

The float history object has the following properties.

Property	Type	Description
clock	timestamp	Time when that value was received.
itemid	string	ID of the related item.
ns	integer	Nanoseconds when the value was received.
value	float	Received value.

The integer history object has the following properties.

Property	Type	Description
clock	timestamp	Time when that value was received.
itemid	string	ID of the related item.
ns	integer	Nanoseconds when the value was received.
value	integer	Received value.

The string history object has the following properties.

Property	Type	Description
clock	timestamp	Time when that value was received.
itemid	string	ID of the related item.
ns	integer	Nanoseconds when the value was received.
value	string	Received value.

The text history object has the following properties.

Property	Type	Description
id	string	ID of the history entry.
clock	timestamp	Time when that value was received.
itemid	string	ID of the related item.
ns	integer	Nanoseconds when the value was received.
value	text	Received value.

The log history object has the following properties.

Property	Type	Description
id	string	ID of the history entry.
clock	timestamp	Time when that value was received.
itemid	string	ID of the related item.
logeventid	integer	Windows event log entry ID.
ns	integer	Nanoseconds when the value was received.
severity	integer	Windows event log entry level.
source	string	Windows event log entry source.
timestamp	timestamp	Windows event log entry time.
value	text	Received value.