Quick question about PL/SQL CURSOR definition and ORDER BY

I had a question about using ORDER BY in a CURSOR declaration..

The following cursor declaration appears to not work.. the compilation error is about missing right paranthesis..

 CURSOR x1 IS
(SELECT c1

    FROM T1
    ORDER BY c2);

If I rewrite it by removing the paranthesis, or if I rewrite it as below, it works..

 CURSOR x1 IS
(SELECT c1

    FROM T1)
    ORDER BY c2;

can you let me know where I can find more information about this..?? or can you explain this a little bit more..

thanks, murali.

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