README.md in qonfig-0.8.0 vs README.md in qonfig-0.9.0

@@ -19,11 +19,11 @@
 require 'qonfig'
 ```
 
 ## Usage
 
-- [Definition and Access](#definition-and-access)
+- [Definition and Settings Access](#definition-and-access)
 - [Configuration](#configuration)
 - [Inheritance](#inheritance)
 - [Composition](#composition)
 - [Hash representation](#hash-representation)
 - [Config reloading](#config-reloading) (reload config definitions and option values)
@@ -41,10 +41,11 @@
 ---
 
 ### Definition and Access
 
 ```ruby
+# --- definition ---
 class Config < Qonfig::DataSet
   # nil by default
   setting :project_id
 
   # nested setting
@@ -58,12 +59,14 @@
   setting :vendor_api do
     setting :user, 'test_user'
   end
 end
 
-config = Config.new
+config = Config.new # your configuration object instance
 
+# --- setting access ---
+
 # get option value via method
 config.settings.project_id # => nil
 config.settings.vendor_api.host # => 'app.service.com'
 config.settings.vendor_api.user # => 'test_user'
 config.settings.enable_graphql # => false
@@ -87,9 +90,15 @@
 config[:enable_graphql] # => false
 
 # get option value in Hash#dig manner (and fail when the required key does not exist)
 config.dig(:vendor_api, :host) # => 'app.service.com' # (key exists)
 config.dig(:vendor_api, :port) # => Qonfig::UnknownSettingError # (key does not exist)
+
+# get a hash slice of setting options (and fail when the required key does not exist)
+config.slice(:vendor_api) # => { 'vendor_api' => { 'host' => 'app_service', 'user' => 'test_user' } }
+config.slice(:vendor_api, :user) # => { 'user' => 'test_user' }
+config.slice(:project_api) # => Qonfig::UnknownSettingError # (key does not exist)
+config.slice(:vendor_api, :port) # => Qonfig::UnknownSettingError # (key does not exist)
 ```
 
 ---
 
 ### Configuration