Moving from J to Namespace.md

@@ -1,32 +0,0 @@
-## Class map in J3:
-
-[https://github.com/joomla/joomla-cms/blob/3.10.12/libraries/classmap.php]
-
-## Class map in J5:
-
-[https://github.com/joomla/joomla-cms/blob/5.0-dev/plugins/behaviour/compat/src/classmap/classmap.php]
-
-## How to handle Classes that have no new counterparts like:
-
-### JError
-- JError::raiseError() should be replaced with native exceptions.
-- JError::raiseWarning() and JError::raiseNotice should be replaced with calls to application's enqueueMessage() method to display warnings/notices.
-
-This would mean you wrap your code in a try catch block and return the error. Someting like this:
-```
-try {
-    // Your code here;
-} catch (\RuntimeException $e) {
-    throw new \Exception($e->getMessage(), 500, $e);
-}
-```
-Or you would manually report an error back like this:
-```
-throw new \Exception(Text::_('Your error message here'), 500);
-```
-
-## More info on backwards compatible issues:
-[https://docs.joomla.org/Potential_backward_compatibility_issues_in_Joomla_4]
-
-## Deprecated JFactory::getDBO(); alternative
-[https://github.com/joomla/joomla-cms/discussions/38111#discussioncomment-3971334]

datetime.md

@@ -1,8 +0,0 @@
-## DateTime in Mysql JCB Settings
-In Joomla 3 we were used to setting the default for a datetime field to 0000-00-00 00:00:00. Since Joomla 4 (because of the mysql 8.0 requirement) that is no longer a valid default value. So it should be set to NULL. 
-
-To do so, you would change your field settings to these:
-
-Data default = Other\
-Other Default = EMPTY\
-Null switch = NULL