When you configure a parse asset, you must select the mode in which the parsing operations will run.
You can select one of the following modes:
Custom mode
Select custom mode to define a parsing operation that uses a dictionary or a regular expression to analyze the input data. When you work in custom mode, you configure all elements of the parsing operation.
Pre-built mode
Select pre-built mode to define a parsing operation that applies built-in pattern logic to the input data. When you work in pre-built mode, you do not need to configure the parsing operation. You can optionally add one or more patterns to the asset logic in order to enhance the parsing performance.