Update README.md

Author: hyojinLGE

README.md

@@ -1,7 +1,7 @@
 # Spatial Navigation
 This is the repository for making the web excellently embrace the spatial navigation features so that the web technology can be propagated into several industries such as TV, IVI, game console, and upcoming smart devices.
 
-This repository consists of the basic description and the current status for [W3C standardization](explainer.md) and [web engine implementation](impl.md) such as Blink, WebKit, Gecko, and EdgeHTML, while the relevant issues would be discussed in W3C working groups and web engine open source communities.
+This repository consists of the basic description for spatial navigation, landscapes of the relevant industries, and the current status for [W3C standardization](explainer.md) and [web engine implementation](impl.md) such as Blink, WebKit, Gecko, and EdgeHTML, while the relevant issues would be discussed in W3C working groups and web engine open source communities.
 
 Raising some issues in this repository is always welcomed as well.
 
@@ -11,11 +11,27 @@ Raising some issues in this repository is always welcomed as well.
 Regarding TV remote control, game console pad, IVI jog dial with 4-way keys, and accessibility, spatial navigation has been a rising important input mechanism in several industries. If the web can embrace the spatial navigation and effectively support the functionalities in web engines and W3C APIs, it will be more promising technology for existing products as mentioned above and various upcoming products.
 
 ## Motivation
+Technical description
+Use cases description
+Industry description
 
 ## Mission
+explainer link
 
 ## History
+The history of WebKit, Blink, Gekco, and W3C
 
 ## FAQ
+1. I’m not sure how the spatial navigation behavior work.
+2. Isn’t it enough using the relevant web framework?
+3. The spatial navigation seems not the general feature esp. in mobile with no physical key-based interface.
 
 ## Reference
+- JavaScript Spatial Navigation (Mozilla)
+  - https://github.com/luke-chang/js-spatial-navigation
+- Implementing TV remote control navigation (MDN)
+  - https://developer.mozilla.org/en-US/docs/Mozilla/Firefox_OS_for_TV/TV_remote_control_navigation
+- Focus navigation with keyboard, gamepad, and accessibility tools (MS)
+  - https://docs.microsoft.com/en-us/windows/uwp/input-and-devices/managing-focus-navigation
+- Designing for Xbox and TV (MS)
+  - https://docs.microsoft.com/en-us/windows/uwp/input-and-devices/designing-for-tv