Improve highlighting

grammars/openscenarionext.cson

@@ -16,8 +16,15 @@ scopes:
   '"Resources"': 'keyword.control'
   'string_literal': 'string.quoted.double'
   'numeric_literal': 'constant.numeric.decimal'
+  'unit_literal': 'constant.numeric.decimal'
   'function_application > identifier': 'entity.name.function'
+  'atomic_predicate': 'entity.name.function'
+  'record_expr > identifier:nth-child(0)': 'variable'
   'record_expr > identifier:nth-child(2)': 'variable.other.member'
+  'scalar_expr > identifier': 'variable'
+  'prototype > identifier': 'variable'
+  'resource > identifier': 'variable'
+  'modifier': 'keyword.control'
 
 folds: [
 
@@ -33,6 +40,18 @@ folds: [
     type: 'act'
   }
 
+  {
+    type: 'rule'
+  }
+
+  {
+    type: 'prototypes'
+  }
+
+  {
+    type: 'resources'
+  }
+
 ]
 
 comments: