README.md in unidom-product-1.0 vs README.md in unidom-product-1.1

@@ -4,26 +4,38 @@
 [![Gem Version](https://badge.fury.io/rb/unidom-product.svg)](https://badge.fury.io/rb/unidom-product)
 
 Unidom (UNIfied Domain Object Model) is a series of domain model engines. The Product domain model engine includes Product and its relative models.
 Unidom (统一领域对象模型)是一系列的领域模型引擎。产品领域模型引擎包括产品及其相关的模型。
 
+
+
 ## Recent Update
+
 Check out the [Road Map](ROADMAP.md) to find out what's the next.
 Check out the [Change Log](CHANGELOG.md) to find out what's new.
 
+
+
 ## Usage in Gemfile
+
 ```ruby
 gem 'unidom-product'
 ```
 
+
+
 ## Run the Database Migration
+
 ```shell
 rake db:migrate
 ```
 The migration versions start with 200202.
 
+
+
 ## Call the Model
+
 ```ruby
 # Create a Product
 product = Unidom::Product::Product.create(name: 'Apple iPhone 6S Plus 64G',
   abbreviation:     'iPhone 6S+ 64G',
   measurement_unit: 'unit',
@@ -39,5 +51,24 @@
 Unidom::Product::ProductAssociating.associate! product_1, with: product_2, due_to: 'ICPT', ordinal: 1, quantity: 1, at: Time.now
 
 # Find the Product Associating per the source product & the target product
 associating = Unidom::Product::ProductAssociating.source_is(product_1).target_is(product_2).first
 ```
+
+
+
+## Include the Concerns
+
+```ruby
+include Unidom::Product::Concerns::AsSourceProductAssociating
+include Unidom::Product::Concerns::AsTargetProductAssociating
+```
+
+### As Source Product Associating concern
+The As Source Product Associating concern do the following tasks for the includer automatically:  
+1. Define the has_many :target_product_associatings macro as: ``has_many :target_product_associatings, class_name: 'Unidom::Product::ProductAssociating', foreign_key: :source_id``
+2. Define the has_many :target_products macro as: ``has_many :target_products, through: :target_product_associatings, source: :target``
+
+### As Target Product Associating concern
+The As Target Product Associating concern do the following tasks for the includer automatically:  
+1. Define the has_many :source_product_associatings macro as: ``has_many :source_product_associatings, class_name: 'Unidom::Product::ProductAssociating', foreign_key: :target_id``
+2. Define the has_many :source_products macro as: ``has_many :source_products, through: :source_product_associatings, source: :source``