Java Development Tools

Hello all,

     I am using jDev 11.1.2.4.    I have an adf application that I started just normal application.  I was working along when I noticed a file under my workflow template, with the same icon, same name but with a file extension of adfc_digram.  When I click it nothing happens it will not open a file.  I went to the file structure and opened the file with a text editor and the file has the below  XML code.  What is this file?  I have never seen it before.  Is it necessary?

Thanks

Steve

<?xml version = '1.0' encoding = 'UTF-8'?>

<SDM>

   <OverallProperties

      id="OverallProperties1"/>

   <MethodCall

      id="MethodCall2">

      <property

         name="activityId">methodCall1</property>

      <property

         name="start">true</property>

      <property

         name="description">&lt;html>&lt;p>&lt;b>methodCall1&lt;/b> (Default Activity)&lt;/p>&lt;p>Activity Type:  Method Call&lt;/p></property>

      <property

         name="exceptionHandler">true</property>

      <property

         name="y">87.94824</property>

      <property

         name="x">113.0</property>

   </MethodCall>

</SDM>