@ngdoc error
@name $compile:iscp
@fullName Invalid Isolate Scope Definition
@description

When declaring isolate scope the scope definition object must be in specific format which starts with mode character (`@&=<`), after which comes an optional `?`, and it ends with an optional local name.

```
myModule.directive('directiveName', function factory() {
  return {
    ...
    scope: {
      'attrName': '@', // OK
      'attrName2': '=localName', // OK
      'attrName3': '<?localName', // OK
      'attrName4': ' = name', // OK
      'attrName5': 'name',    // ERROR: missing mode @&=
      'attrName6': 'name=',   // ERROR: must be prefixed with @&=
      'attrName7': '=name?',  // ERROR: ? must come directly after the mode
    }
    ...
  }
});
```

Please refer to the {@link ng.$compile#directive-definition-object
`scope` option} of the directive definition documentation to learn more about the API.
