A specialized layout that renders to W3C Extended Log Format (ELF)

Platforms Supported: All

Introduced with NLog.Web 5.0

<target name="w3cFile" xsi:type="File" fileName="log-file.json" >
      <layout xsi:type="W3CExtendedLogLayout">
              <directive name="Software" layout="My Web Server" />         <!-- Optional - Can be repeated -->
              <field name="cs-method" layout="${aspnet-request-method}" /> <!-- Optional - Can be repeated -->
       </layout>
</target>

Note default fields will be printed, when no fields has been specified. Same behavior for directives.

• field

  • name - Required. The name of the W3C Extended Field
  • layout - The layout value of the W3C Extended Field

• directive

  • name - Required. The name of the W3C Extended Directive Header
  • layout - The layout value of the W3C Extended Directive Header

Available W3C log-parsers:

• https://github.com/jibedoubleve/log-reader
• https://support.microsoft.com/en-us/topic/log-parser-2-2-and-asp-net-37531636-1cf5-dc52-f12a-6a9252155631
• https://techcommunity.microsoft.com/t5/exchange-team-blog/introducing-log-parser-studio/ba-p/601131
• https://www.finalanalytics.com/products/httplogbrowser