One context is for the properties files that configure various aspects of the app. The server properties files cannot be edited through the user interface – they require direct access to the server. Reference information is available in the properties document. Administrators can see and reload the properties on the server properties page through the system administration.
Another class of properties are defined by the PageSeeder Markup Language (PSML). These are properties that can be attached to documents, fragments and binary files.
For further information, see the following: