diff --git a/ICCC/Doc.go b/ICCC/Doc.go
index 15399a2..80f5343 100644
--- a/ICCC/Doc.go
+++ b/ICCC/Doc.go
@@ -1,4 +1,46 @@
 /*
-This is the "[I]nter-[C]omponent [C]ommunication [C]hannel"
+This is the "[I]nter-[C]omponent [C]ommunication [C]hannel". It is a minimal
+messaging service to connect different servers or even different parts of
+huge systems across programming languages.
+
+The basis idea is to create such messaging service on top of HTTP, because
+every programming language is able to process HTTP. Therefore, all messages
+are transformed to HTTP form values (with URL encoding).
+
+To be able to marshal / parse the data back to objects, some additional
+information is added:
+
+Example 01:
+name=str:Surname
+value=Sommer
+
+The HTTP form name is 'str:Surname' and the value is 'Sommer'. The 'str' is
+the indicator for the data type, in this case it is a string.
+
+Known data types are:
+* str := string
+* int := 64 bit integer (means for some languages long, e.g. .NET/C#)
+* f64 := 64 bit float (means for some languages double, e.g. .NET/C#)
+* bool := boolean
+* ui8 := 8 bit unsigned integer i.e. a byte
+* ui8[] := byte array
+* int[] := 64 bit integer array
+* bool[] := boolean array
+* str[] := string array
+* f64[] := 64 bit float array
+
+Formatting of the corresponding values (each value is a string => HTTP). Plase note:
+For the arrays, the name will repeated for each value.
+* str := the plain UTF8 string
+* int := the integer e.g. '13894612'
+* f64 := the float with nine digits e.g. 9.48 gets '9.480000000'
+* bool := 'true' or 'false' (lower case)
+* ui8 := the byte as hexadecimal string e.g. 255 gets 'ff'
+* ui8[] := the bytes as hexdecimal strings e.g. 0 255 0 gets ui8[]:name:00 ui8[]:name:ff ui8[]:name:00
+* int[] := 64 bit integer array e.g. 1 2 gets int[]:name:1 int[]:name:2
+* bool[] := a boolean array e.g. true true gets bool[]:name:true bool[]:name:true
+* str[] := string array e.g. 'a' 'abc' gets str[]:name:a str[]:name:abc
+* f64[] := 64 bit float array e.g. 1.1 1.2 gets f64[]:name:1.100000000 f64[]:name:1.2000000000
+
 */
 package ICCC