Each Project has its own Map. The Map is simply a list of all downloaded files for the Project. For example:

c:\download\www.server.com\articles\file001.htm

c:\download\www.server.com\default.htm

c:\download\www.server.com\images\banner.gif

c:\download\www.server.com\images\pixel.gif

When Portable Offline Browser downloads a Project, every downloaded file is being added to the Project's Map.

Portable Offline Browser uses the list of files in a Project Map during certain operations with Projects - export, delete, backup, search, print and some other.

All Map files are stored in the directory set in the Options dialog | File Locations section - Projects, Maps and Templates directory. They all have .map extension.

Files with .map extension are simple text files. Each filename is being placed on a separate line. There could be some additional parameters (MIME type, level, etc.) They are separated with a tab character from the filename.

If a Map file of a Project is lost for some reason, it is easy to restore it. Simply select the Project and press Ctrl-F5 on the keyboard. Portable Offline Browser will start downloading the Project in the "Do not load existing files" mode. This adds all existing and newly loaded files to the Project Map.