The file "site.properties" is located in the "design" folder. It's primary purpose is to specify which site navigation property files are available to load.
For example, if the file has a line in it like this:
NavigationProperties = lefthandnav;pathnav
It indicates that two navigaion properties files should be loaded called: "lefthandnav.properties" and "pathnav.properties". Both files should be located in the same "design" folder as the "site.properties" file itself.
See Navigation Properties for more information.
Two other less important properties can be specified in this file:
The property "ContentPagesReservedPaths" can be used to prevent the content provider from using particular paths in the content folder. It is a list of web pages that should not exist in the content/pages folder. Each reserved page is separated by a semicolon (no priorty or extensions - spaces etc are ignored and the path separator is forward slash) - a folder called "design" is automatically reserved.
For example:
ContentPagesReservedPaths = design2;whats happening/dynamic
The property "BuildProtectedPaths" can be used to prevent WebBuild from deleteing particular files and folders in the build directory. It specifies a list of paths relative from the root of the build folder (leading slash is required) which Webbuild will not be remove prior to each build operation. Each path is separated by a semicolon (case insensitive). The paths must be in the form of the operating system in use i.e. backslash for Windows forward slash for unix.
For example:
BuildProtectedPaths = \\frontpagehacks;\\a protected file.html;\\test\\subfolder\\this is protected.html
See Property File Syntax for more information on the formating of property files.

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