Change readme

README.md

@@ -16,47 +16,39 @@ and the build system [cabal >= 1.22](https://www.haskell.org/cabal/).
 Input
 ------
 
-Peregrine takes a single population protocol as input.
-The following example shows how a protocol is encoded:
+Peregrine takes a single population protocol as JSON-encoded input.
+The following example shows the input format:
 
 ```
-population protocol "Majority Protocol" {
-    states { a b a_small b_small}
-    transitions { t1 t2 t3 t4 }
-    arcs { { a, b } -> t1 -> { a_small, b_small }
-           { b, a_small } -> t2 -> { b, b_small }
-           { a, b_small } -> t3 -> { a, a_small }
-           { a_small, b_small } -> t4 -> { a_small, a_small }
-         }
-    initial { a b }
-    true { a a_small }
-    false { b b_small }
+{
+    "title": "Majority Protocol",
+    "states": ["A", "a", "B", "b"],
+    "transitions": [
+                    { "name": "t1",
+                      "pre": ["A", "B"],
+                      "post": ["a", "b"]
+                    },
+                    { "name": "t2",
+                      "pre": ["B", "a"],
+                      "post": ["B", "b"]
+                    },
+                    { "name": "t3",
+                      "pre": ["A", "b"],
+                      "post": ["A", "a"]
+                    },
+                    { "name": "t4",
+                      "pre": ["a", "b"],
+                      "post": ["a", "a"]
+                    }
+                   ],
+    initialStates: ["A", "B"],
+    trueStates: ["A", "a"],
+    predicate: "A >= B",
+    description: "This protocol computes whether there are more B-states than A-states"
 }
 
 
 ```
-* After the keyword *population protocol* the name of the protocol is given in
-quotes.
-
-* Finite sets are specified in braces
-through space- or comma-separated lists of  names.
-Names consist of alphanumerical characters or underscores.
-
-* The set of states is given after the identifier *states*.
-
-* In order to make transitions identifiable,
-each transition must be given a name after the  keyword *transitions*.
-
-* Transitions are defined after the keyword *arcs*; there must be one definition
-  for each transition name.
-
-* The set following the keyword *initial* specifies states that can
-belong to an initial population.
-
-* The sets following the keywords *true* and *false* identify the states
-that map to true and false, respectively.
-
-
 
 Usage
 -------