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2.10.2.3. The STRUCTURED-DATA message part

The STRUCTURED-DATA message part may contain meta- information about the syslog message, or application-specific information such as traffic counters or IP addresses. STRUCTURED-DATA consists of data blocks enclosed in brackets ([]). Every block includes the ID of the block, and one or more name=value pairs. The syslog-ng application automatically parses the STRUCTURED-DATA part of syslog messages, which can be referenced in macros (for details, see Section 11.1.5, Macros of syslog-ng PE). An example STRUCTURED-DATA block looks like:

[exampleSDID@0 iut="3" eventSource="Application" eventID="1011"][examplePriority@0 class="high"]