change links to cross ref

docs/modules/tutorials/pages/beginner/hello_simpleapplication.adoc

@@ -7,7 +7,7 @@
 
 *Prerequisites:* This tutorial assumes that you have xref:ROOT:documentation.adoc#install[downloaded the jMonkeyEngine SDK].
 
-In this tutorial series, we assume that you use the jMonkeyEngine <<sdk#,SDK>>. As an intermediate or advanced Java developer, you will quickly see that, in general, you can develop jMonkeyEngine code in any integrated development environment (NetBeans IDE, Eclipse, IntelliJ) or even from the <<jme3/simpleapplication_from_the_commandline#,command line>>.
+In this tutorial series, we assume that you use the jMonkeyEngine xref:ROOT:sdk.adoc[SDK]. As an intermediate or advanced Java developer, you will quickly see that, in general, you can develop jMonkeyEngine code in any integrated development environment (NetBeans IDE, Eclipse, IntelliJ) or even from the xref:ROOT:jme3/simpleapplication_from_the_commandlin.adoc[command line].
 
 OK, let's get ready to create our first jMonkeyEngine3 application.
 
@@ -24,12 +24,12 @@ In the jMonkeyEngine SDK:
 .  Click btn:[Finish].
 
 This will create a basic jme3 application for an easy start with jme3. You can click the run button to run it: You will see a blue cube.
-If you have questions, read more about <<sdk/project_creation#,Project Creation>> here.
+If you have questions, read more about xref:ROOT:target-page-filename.adoc[Project Creation] here.
 
 
 [TIP]
 ====
-We recommend to go through the steps yourself, as described in the tutorials. Alternatively, you can create a project based on the <<sdk/sample_code#,JmeTests>> template in the jMonkeyEngine SDK. It will create a project that already contains the `jme3test.helloworld` samples (and many others). For example, you can use the JmeTests project to verify whether you got the solution right.
+We recommend to go through the steps yourself, as described in the tutorials. Alternatively, you can create a project based on the xref:ROOT:sdk/sample_code.adoc[JmeTests] template in the jMonkeyEngine SDK. It will create a project that already contains the `jme3test.helloworld` samples (and many others). For example, you can use the JmeTests project to verify whether you got the solution right.
 ====
 
 
@@ -163,7 +163,7 @@ a|I create the Box at the origin = at `Vector3f.ZERO`.
 
 |===
 
-If you are unfamiliar with the vocabulary, read more about <<jme3/the_scene_graph#,the Scene Graph>> here.
+If you are unfamiliar with the vocabulary, read more about xref:ROOT:jme3/the_scene_graph.adoc[the Scene Graph] here.
 
 
 === Initialize the Scene
@@ -261,7 +261,7 @@ public class MyGame extends SimpleApplication {
 }
 ----
 
-Then have all logic implemented in <<jme3/advanced/application_states#,AppStates>> and your SimpleApplication will never change much, except when you want to add a bootstrap AppState (or maybe you can have an AppState that manages AppStates...), SimpleApplication is just the list of states you are using.
+Then have all logic implemented in xref:ROOT:jme3/advanced/application_states.adoc[AppStates] and your SimpleApplication will never change much, except when you want to add a bootstrap AppState (or maybe you can have an AppState that manages AppStates...), SimpleApplication is just the list of states you are using.
 
 In future versions, all the code in SimpleApplication will be refactored in AppStates (InputHandlingState, RenderAppState, whatever) and you will decide what you want to use. However, for legacy sake we kept the code as is for now.
 
@@ -298,15 +298,8 @@ When developing a game application, you want to:
 .  Trigger game actions
 .  Respond to user input.
 
-The now following tutorials teach how you accomplish these tasks with the jMonkeyEngine 3.
-
-Continue with the <<jme3/beginner/hello_node#,Hello Node>> tutorial, where you learn more details about how to initialize the game world, also known as the scene graph.
-
 '''
 
 See also:
 
-*  <<documentation#,Install the jMonkeyEngine>>
-*  <<jme3/simpleapplication_from_the_commandline#,SimpleApplication From the Commandline>>
-*  <<sdk/project_creation#,Create a JME3 project>>
-*  <<jme3/advanced/application_states#,AppStates>>
+*  xref:ROOT:sdk/project_creation[Create a JME3 project]