Configuration File
From DocDataFlow
Configuration File
Crawler's personalities are driven to a great extent by means of configuration files.
There is no hard rule that dictates how these configuration files should be created - they could be text files, INI-files, XML-based files,...
Because .INI files are easy to understand for end-users, most of the pre-made personalities use .INI-based configuration files.
For more popular personalities, GUI-driven configuration tools might be provided, but in many cases, the GUI-development might lag, in which case the next easiest method to (re)configure a Crawler personality is to edit one or more configuration files.
INI file
Basic INI files are a loose de-facto standard; more info can be found here.