angular.module('app', [])
    .directive('myDirective', function() {
        return {
        restrict: String,          
        priority: Number,
        terminal: Boolean,
        template: String or Template Function:
        function(tElement, tAttrs) {...},
        templateUrl: String,
        replace: Boolean or String,
        scope: Boolean or Object,
        transclude: Boolean,
        controller: String or
        function(scope, element, attrs, transclude, otherInjectables) { ... },
        controllerAs: String,
        require: String,
        link: function(scope, iElement, iAttrs) { ... },
        compile: // 返回一个对象或连接函数，如下所示：
        function(tElement, tAttrs, transclude) {
            return {
                pre: function(scope, iElement, iAttrs, controller) { ... },
                post: function(scope, iElement, iAttrs, controller) { ... }
               }
            return function postLink(...) { ... }
            }
        };
     });
     
     

下面我们来从上到下解释一下。
本系列所有的 实例基于 angular-seed

• restrict String，
  E（元素）<my-directive></my-directive>
  A（属性，默认值）<div my-directive="expression"></div>
  C（类名）<div class="my-directive:expression;"></div>
  M（注释）<--directive:my-directive expression-->

• priority: Number，指令执行优先级

• template: String，指令链接DOM模板，例如<h1>{{head}}</h1>

• templateUrl:String，DOM模板路径

• replace: Boolean，指令链接模板是否替换原有元素