Provide unit in config.xml and documentation

This commit remove urn:AGL:widget:provided-application
in favour of urn:AGL:widget:provided-unit.
In the same time, the feature urn:AGL:widget:provided-api
must be attached to a unit. This will enable to export
more than one API for a unit if needed.

Change-Id: I17ade3651db2cd61402875333d063ee05cf57a10
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 77 insertions, 1 deletions

diff --git a/docs/permissions.md b/docs/permissions.md
index 09f68a3..0c18180 100644
--- a/docs/permissions.md
+++ b/docs/permissions.md
@@ -37,9 +37,15 @@ the characters colon and star (:*). This field designates the api
 providing the permission. This scheme is used to deduce binding requirements
 from permission requirements. The field `<api>` can be the empty
 string when the permission is defined by the AGL system itself.
-The field `<api>` if starting with the character "@" represents
+
+[PROPOSAL 1] The field `<api>` if starting with the character "@" represents
 a transversal/cross permission not bound to any binding.
 
+[PROPOSAL 2]The field `<api>` if starting with the 2 characters "@@"
+in addition to a permission not bound to any binding, represents a
+permission that must be set at installation and that can not be
+revoked later.
+
 	<level> ::= 1*<lower>
 
 The field `<level>` is made only of letters in lower case.
@@ -62,5 +68,75 @@ names at right. This hierarchical behaviour is intended to
 be used to request permissions using hierarchical grouping.
 
 
+Permission value
+----------------
+
+In some case, it could be worth to add a value to a permission.
+
+Currently, the framework allows it for permissions linked to
+systemd. But this not currently used.
+
+Conversely, permissions linked to cynara can't carry data
+except in their name.
+
+Thus to have a simple and cleaner model, it is better to forbid
+attachement of value to permission.
+
+
+Example of permissions
+----------------------
+
+Here is a list of some possible permissions. These
+permissions are available the 17th of March 2017. 
+
+ - urn:AGL:permission::platform:no-oom
+
+   Set OOMScoreAdjust=-500 to keep the out-of-memory
+   killer away.
+
+ - urn:AGL:permission::partner:real-time
+
+   Set IOSchedulingClass=realtime to give to the process
+   realtime scheduling.
+
+   Conversely, not having this permission set RestrictRealtime=on
+   to forbid realtime features.
+
+ - urn:AGL:permission::public:display
+
+   Adds the group "display" to the list of supplementary groups
+   of the process.
+
+ - urn:AGL:permission::public:syscall:clock
+
+   Without this permission SystemCallFilter=~@clock is set to
+   forfid call to clock.
+
+ - urn:AGL:permission::public:no-htdocs
+
+   The http directory served is not "htdocs" but "."
+
+ - urn:AGL:permission::public:applications:read
+
+   Allows to read data of installed applications (and to
+   access icons).
+
+ - urn:AGL:permission::partner:service:no-ws
+
+   Forbids services to provide its API through websocket.
+
+ - urn:AGL:permission::partner:service:no-dbus
+
+   Forbids services to provide its API through D-Bus.
+
+ - urn:AGL:permission::system:run-by-default
+
+   Starts automatically the application. Example: home-screen.
+
+ - http://tizen.org/privilege/internal/dbus
+
+   Permission to use D-Bus.
+
+
 [URN]: https://tools.ietf.org/rfc/rfc2141.txt "RFC 2141: URN Syntax"