TL;DR: Username => Dossier

Maigret is designed to gather all the available information about person by his username.

What kind of information is this? First, links to person accounts. Secondly, all the machine-extractable pieces of info, such as: other usernames, full name, URLs to people’s images, birthday, location (country, city, etc.), gender.

All this information forms some dossier, but it also useful for other tools and analytical purposes. Each collected piece of data has a label of a certain format (for example, follower_count for the number of subscribers or created_at for account creation time) so that it can be parsed and analyzed by various systems and stored in databases.