6 files changed, 36 insertions, 8 deletions
diff --git a/docs/README.md b/docs/README.md
index 337a14c..5079519 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -1,7 +1,11 @@
 # Introduction
 
-This template is also a documentation that explains how to setup and write
-your documentation with gitbook.
+You will find in this documentation a presentation about Signal Composer
+architecture. Signal Composer is an Application Framework binding meant to
+facilitate handling signaling, by compose, divide and create new virtuals
+signals from RAW signals coming from _low level_ binding that handle read/write,
+encode/decode on different protocols that a car could use (CAN, LIN, Ethernet,
+GPS, i2c, ...).
 
 <br>
 <br>
diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 9d0f0a8..369ea6e 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -2,8 +2,7 @@
 
 * [Document revisions](0-Doc-Revisions.md)
 
-* [Signal Composer](part-1/0_Abstract.md)
-  * [Architecture](part-1/1-Architecture.md)
-  * [Configuration](part-1/2-Configuration.md)
-  * [Plugin](part-1/3-Plugins.md)
-  * [Signal Composer API](part-1/4-SignalComposerAPI.md)
+* [Architecture](part-1/1-Architecture.md)
+* [Configuration](part-1/2-Configuration.md)
+* [Plugin](part-1/3-Plugins.md)
+* [Signal Composer API](part-1/4-SignalComposerAPI.md)
diff --git a/docs/cover.jpg b/docs/cover.jpg
index ea03df1..954e32c 100644
--- a/docs/cover.jpg
+++ b/docs/cover.jpg
diff --git a/docs/cover_small.jpg b/docs/cover_small.jpg
index 5fcb1de..4278b7e 100644
--- a/docs/cover_small.jpg
+++ b/docs/cover_small.jpg
diff --git a/docs/part-1/3-Plugins.md b/docs/part-1/3-Plugins.md
index cbc7284..50ece7b 100644
--- a/docs/part-1/3-Plugins.md
+++ b/docs/part-1/3-Plugins.md
@@ -1,6 +1,15 @@
 # Plugins
 
-Plugins are C/C++ shared library that is loaded by the binding to execute some
+Plugins are C/C++ shared library loaded by the binding to execute some
 simple routine. Routine could be on reception of a new signal or at sources
 initialization time or signal subscription with the respective JSON field
 **onReceived**, **init** and **getSignals**.
+
+A default plugin (builtin) is provided with 2 functions:
+
+- **defaultOnReceived**: set and record a new signal value and its timestamp
+ in the signal composer service. It simply tooks the incoming event JSON object
+ and search for *key* **value** and **timestamp** then call function
+ `setSignalValue`.
+- **setSignalValueWrap**: a **lua2c** function the could be called from any LUA
+ script to record a new signal value.
diff --git a/docs/part-1/4-SignalComposerAPI.md b/docs/part-1/4-SignalComposerAPI.md
index dc47f01..246b62f 100644
--- a/docs/part-1/4-SignalComposerAPI.md
+++ b/docs/part-1/4-SignalComposerAPI.md
@@ -19,6 +19,22 @@ ON-EVENT signal-composer/257b343e-8ea9-4cd7-8f9e-1904fa77f8f2({"event":"signal-c
 Unsubscribe happens the same way. When no more signals are holded by the client
 then it unsubscribe from the *AGL Application Framework* event handle.
 
+## addObjects
+
+Let you add sources or signals objects to the signal composer service after
+its initialization phase. Use this verb and specify the file as argument, you
+could use only the file name or the file name with its absolute path.
+
+```json
+signal-composer addObjects {"file": "sig_doors.json"}
+ON-REPLY 1:signal-composer/addObjects: {"jtype":"afb-reply","request":{"status":"success","uuid":"00d7a519-816e-486a-8163-3afb1face4fa"}}
+signal-composer addObjects {"file": "/tmp/sig_doors.json"}
+ON-REPLY 2:signal-composer/addObjects: {"jtype":"afb-reply","request":{"status":"success"}}
+```
+
+You can follow the activity using the service log journal and check that the
+correct number of objects has been added.
+
 ## get
 
 You can get a signal value be requesting the API with the verb *get*: