add: exclusive property added to express exclusivity at predicate or value level

Exclusive property allows to express if a predicate or a value is exclusive.
The exclusive property applies at namespace level (if the predicate is exclusive) or
at predicate level is the value is exclusive.

TLP and fr-classif updated with exclusive property.

The exclusive property can be used by the software (e.g. MISP) to warn users
if (s)he tries to add multiple tags on the same element (attribute, event...).
It's up to the configuration of the software to enforce it or not.

By default, tags are not exclusive.

fr-classif/machinetag.json

@@ -47,18 +47,22 @@
   "predicates": [
     {
       "expanded": "Informations classifiées défense",
-      "value": "classifiees-defense"
+      "value": "classifiees-defense",
+      "exclusive": true
     },
     {
       "expanded": "Informations non classifiées defense",
-      "value": "non-classifiees-defense"
+      "value": "non-classifiees-defense",
+      "exclusive": true
     },
     {
       "expanded": "Informations non classifiées",
-      "value": "non-classifiees"
+      "value": "non-classifiees",
+      "exclusive": true
     }
   ],
-  "version": 1,
+  "version": 2,
   "description": "French gov information classification system",
-  "namespace": "fr-classif"
+  "namespace": "fr-classif",
+  "exclusive": true
 }

schema.json

@@ -72,6 +72,9 @@
           "value": {
             "type": "string"
           },
+          "exclusive": {
+            "type": "boolean"
+          },
           "required": [
             "value"
           ]
@@ -94,6 +97,9 @@
     "namespace": {
       "type": "string"
     },
+    "exclusive": {
+      "type": "boolean"
+    },
     "type": {
       "type": "array",
       "uniqueItems": true,

tlp/machinetag.json

@@ -33,8 +33,9 @@
   "refs": [
     "https://www.first.org/tlp"
   ],
-  "version": 4,
+  "version": 5,
   "description": "The Traffic Light Protocol - or short: TLP - was designed with the objective to create a favorable classification scheme for sharing sensitive information while keeping the control over its distribution at the same time.",
   "expanded": "Traffic Light Protocol",
-  "namespace": "tlp"
+  "namespace": "tlp",
+  "exclusive": true
 }