ports have type

Exercise-Configuration.md

@@ -210,6 +210,9 @@ Mandatory items are bold, optional italic, description of items follows:
 * **${implicit list of boxes}** - ...
     * **name** - ...
     * **portsIn** - ...
+        * ${name of the port}
+            * **type** - ...
+            * **value** - ...
     * **portsOut** - ...
     * **type** - ...
 
@@ -220,37 +223,37 @@ Example:
    {
       "name":"source",
       "portsIn":[],
-      "portsOut":[{ "source_file":"source_file" }],
+      "portsOut":[{ "source_file":[{"type":"file", "value":"source_file"}] }],
       "type":"data"
    },
    {
       "name":"test",
       "portsIn":[],
       "portsOut":[{
-         "test_file":"test_file",
-         "expected_output":"expected_output"
+         "test_file":[{"type":"file", "value":"test_file"}],
+         "expected_output":[{"type":"file", "value":"expected_output"}]
       }],
       "type":"data"
    },
    {
       "name":"compilation",
-      "portsIn":[{ "input_file":"source_file" }],
-      "portsOut":[{ "output_file":"binary_file" }],
+      "portsIn":[{ "input_file":[{"type":"file", "value":"source_file"}] }],
+      "portsOut":[{ "output_file":[{"type":"file", "value":"binary_file"}] }],
       "type":"compilation"
    },
    {
       "name":"run",
-      "portsIn":[{ "binary_file":"binary_file" }],
-      "portsOut":[{ "output_file":"actual_output" }],
+      "portsIn":[{ "binary_file":[{"type":"file", "value":"binary_file"}] }],
+      "portsOut":[{ "output_file":[{"type":"file", "value":"actual_output"}] }],
       "type":"execution"
    },
    {
       "name":"judge",
       "portsIn":[{
-         "actual_output":"actual_output",
-         "expected_output":"expected_output"
+         "actual_output":[{"type":"file", "value":"actual_output"}],
+         "expected_output":[{"type":"file", "value":"expected_output"}]
       }],
-      "portsOut":[{ "score":"score" }],
+      "portsOut":[{ "score":[{"type":"file", "value":"score"}] }],
       "type":"evaluation"
    }
 ]