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With properties, users can choose any other attributes that they want to log. Imagine there is an element carrying the transaction id ID in the SOAP body. Users can You could use an XPath expression to extract out this transaction id ID element and log it using the log Log mediator. It is possible to define several such properties to be logged. If properties are specified with any of the first three log levels, custom properties will be logged along with the default ones.

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• Property Name - Name for the property.
• Property Value- The type of the property value you will specify:
  
  • Value - A static text message.
  • Expression - An XPath or JSON Path JSONPath expression executed on each message.
• Value/Expression - The text or expression you want to log. When specifying a JSON PathJSONPath, use the format json-eval(<JSON_PATH>), such as json-eval(getQuote.request.symbol). For more information on using JSON with the ESB, see JSON Support.
• Name Space Editor - You can click on the "Namespaces" link to add namespaces if you are providing an expression. You will be provided another panel named "Namespace Editor" where you can provide any number of namespace prefixes and URL that you have used in the expression.

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