Continuing with doc

README.md

@@ -2,7 +2,7 @@ Introduction
 ------------
 
 The LstDataProcess library provides tools to read, write and process Lst binary files produced at the ILL.
-Read The [User's Guide](doc/UsersGuide.md) 
+Read the [User's Guide](doc/UsersGuide.md) 
 
 Installation
 ------------

doc/UsersGuide.md

 Introduction
 ------------
 
-The User's Guide provides essential information on how to use the library.
\ No newline at end of file
+The User's Guide provides essential information on how to use the library.
+To access the library API you should include:
+
+	#include <lstdpp128/lstdpp.h>
+
+Open a File
+-----------
+
+First of all, you have to open a file.
+
+	// Initialize a reader with a buffer of size 4096.
+	Reader reader(4096);
+
+	// Open the file.
+	bool success = reader.open(fileName);
+
+	// Exit in case of error.
+	if (!success) {
+		return EXIT_FAILURE;
+	}
+
+	// Print the list mode context.
+	cout << listModeContext << endl;
+	
+The *listModeContext* object contains the context of the loaded file. It represents the configuration of the electronic cards.
+The model is the following:
+* The context contains a Crateboard
+* A Crateboard contains some Boards
+* A Board contains some Channels
+
+The structures are:
+* Board
+
+Members|Type
+------------
+eventType|uint16_t
+crate|uint8_t
+nbChannels|uint16_t 
+boardType|BoardType
+
+
+
+