Update mxml.md
working on enriching this page.
diff --git a/features/mxml.md b/features/mxml.md
index adb3905..92df6e5 100644
--- a/features/mxml.md
+++ b/features/mxml.md
@@ -26,6 +26,8 @@
MXML is an XML language that you use, when building an application in Royale, to lay out user-interface components.
+Most Royale applications have an MXML file as the main file in the app. It provides the structure of the application, and generally imports resources and functions that the app needs.
+
```mxml
<?xml version="1.0" encoding="utf-8"?>
<j:Group xmlns:fx="http://ns.adobe.com/mxml/2009"
@@ -50,4 +52,4 @@
</j:HGroup>
</j:Card>
</j:Group>
-```
\ No newline at end of file
+```
