XnView uses an SQLite database for storing this info and accessing it; Windows uses a flat file for the image metadata and another for the actual image thumbnails.

A complete database with multiple tables, indices, triggers, and views lives in just a single file. SQLite requires zero configuration and setup, and also little to no maintenance.

Interestingly enough, when viewing the db files directly from the command line (via sqlite3 notes_01.db and .dump) I discovered that the iPhone saved my entire history of edits for my note files ...

Because SQLite is embedded in thousands of apps, the vulnerability impacts a wide range of software, from IoT devices to desktop software, and from web browsers to Android and iOS apps.

The SQLite database is a wildly successful and ubiquitous software package that is mostly unknown to the larger IT community. Designed and coded by Dr. Richard Hipp, the third major revision of SQLite ...