The Ada mode currently provided with jEdit only supports Ada95 and it is missing some of Ada95's reserved words as well. I put together a new Ada mode with support for a complete set of Ada 2005 reserved words, attributes, and predefined pragmas. My enhanced mode also does a smarter job at auto-indenting Ada code. I have attached it.
I respectfully suggest that the current Ada95 mode be replaced with this new mode under just the name "ada." Here is the catalog entry I am using for it.