- "Associative list of project files.
-It has the following format:
-\((project_name . value) (project_name . value) ...)
-As always, the values of the project file are defined through properties.")
+ "Associative list of project files with properties.
+It has the format: (project project ...)
+A project has the format: (project-file . project-plist)
+\(See 'apropos plist' for operations on property lists). See
+ada-xref-set-default-prj-values for the list of valid properties. The
+current project is retrieved with ada-xref-current-project. Properties
+are retrieved with ada-xref-get-project-field, set with
+ada-xref-set-project-field. If project properties are accessed with no
+project file, a (nil . default-properties) entry is created.")