Update exclusive* keywords specification

exclusiveMinimum and exclusiveMaximum are no longer boolean values changing the behaviour of respectively the minimum and maximum keywords, but are now fully independent keywords incompatible with minimum and maximum.

Author: dud225

source/reference/numeric.rst

@@ -149,45 +149,53 @@ Range
 '''''
 
 Ranges of numbers are specified using a combination of the
-``minimum``, ``maximum``, ``exclusiveMinimum`` and
-``exclusiveMaximum`` keywords.
+``minimum`` and ``maximum`` keywords (or ``exclusiveMinimum`` and
+``exclusiveMaximum`` for expressing exclusive range).
 
-- ``minimum`` specifies a minimum numeric value.
+- ``minimum`` specifies an inclusive lower limit for a numeric instance,
+  i.e., :math:`x \ge\mathrm{min}`.
+  
+- ``exclusiveMinimum`` specifies an exclusive lower limit for a numeric instance,
+  i.e., :math:`x > \mathrm{min}`.  
 
-- ``exclusiveMinimum`` is a boolean.  When ``true``, it indicates that
-  the range excludes the minimum value, i.e., :math:`x >
-  \mathrm{min}`.  When ``false`` (or not included), it indicates that
-  the range includes the minimum value, i.e., :math:`x \ge
-  \mathrm{min}`.
-
-- ``maximum`` specifies a maximum numeric value.
-
-- ``exclusiveMaximum`` is a boolean.  When ``true``, it indicates that
-  the range excludes the maximum value, i.e., :math:`x <
-  \mathrm{max}`.  When ``false`` (or not included), it indicates that
-  the range includes the maximum value, i.e., :math:`x \le
-  \mathrm{max}`.
+- ``maximum`` specifies an inclusive upper limit for a numeric instance,
+  i.e., :math:`x \le\mathrm{max}`.
+  
+- ``exclusiveMaximum`` specifies an exclusive upper limit for a numeric 
+  instance.  , i.e., :math:`x < \mathrm{max}`.
 
 .. schema_example::
 
     {
       "type": "number",
       "minimum": 0,
-      "maximum": 100,
-      "exclusiveMaximum": true
+      "maximum": 100
     }
     --X
     // Less than ``minimum``:
     -1
     --
-    // ``exclusiveMinimum`` was not specified, so 0 is included:
+    // ``minimum`` is inclusive, so 0 is valid:
     0
     --
     10
     --
     99
     --X
-    // ``exclusiveMaximum`` is ``true``, so 100 is not included:
+    // ``maximum`` is inclusive, so 100 is valid:
+    100
+    --X
+    // Greater than ``maximum``:
+    101
+
+.. schema_example::
+    {
+      "type": "number",
+      "minimum": 0,
+      "exclusiveMaximum": 100
+    }
+    --X
+    // ``exclusiveMaximum`` is exclusive, so 100 is not valid:
     100
     --X
     // Greater than ``maximum``: