Built-in Properties

All Seq events expose a set of built-in properties that are distinguished by the @ symbol in their name:

Property	Description	Example Contents	Usage
`@Arrived`	An integer indicating the order in which the event arrived at the Seq server	12344	`@Arrived <= Arrived('event-d8ce...0000')`
`@Data`	The internal representation of the event as a single structured object.	{ "@t": ... }	`Contains(ToJson(@Data), 'coffee')`
`@EventType`	A hash of the message template that was used to generate the event	0x5432a8ff	`@EventType <> 0x5432a8ff`
`@Exception`	The exception associated with the event if any, as a string	System.InvalidOp...	`@Exception like '%zero%'`
`@Id`	The event's unique id in Seq	event-d8ce...0000	`@Id = 'event-d8ce...0000'`
`@Level`	The logging level of the event, as a string	Warning	`@Level <> 'Warning'`
`@Message`	The text message associated with the event	Failed to open file...	`@RenderedMessage like 'Failed%'`
`@MessageTemplate`	The message template used to generate the event	Logged in {Username}	`@MessageTemplate = 'Logged in {Username}'`
`@Properties`	A dictionary with all properties associated with the event (Seq 3.1)	`{"Name": "alice.example", "ThreadId": 10}`	`@Properties['some irregular identifier']`
`@Timestamp`	The UTC timestamp associated with the event	2015-02-28T13:56:20.293Z	`@Timestamp > DateTime('2015-01-13 06:00Z')`

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Quick filter shortcuts
Many queries listed here are provided as one-click shortcuts via the row of blue links beneath the message text in an expanded log event - Id, Level, Type and so-on.

👍Quick filter shortcuts

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Quick filter shortcuts