Newbie question on child packages

["Justin Birtwell" <jbirtwell@yahoo.com>]

Hello all,

I'm trying to figure out how to create and use child packages.  Here's what
I've got so far.

Top level, empty parent package....JB.ads
package JB is
    --empty
end JB;

A child package spec called A.ads
package JB.A is
.........
end JB.A;

A child package body called A.adb
package body JB.A is
    <code>
end JB.A;

Here's my problem.  When I go to compile and build A I get an error from
A.adb "file jb-A.ads not found".  I made sure to compile A.ads but I'm still
getting the same error.  All the files are in the same folder.  Do I have to
change the name of A.ads to JB.A.ads?  or JB-A.ads?  This seems to defeat
the whole point of modularity and independence?

Please help.  I've read the chapters on Packages and Child packages in
Programming Ada 95 and the documentation at
http://www.it.bton.ac.uk/staff/je/adacraft but alas no help here.

Thanks,
Justin