...
C:\Development\JiraDev\M3Release>svn export svn\M3ImplRelease implExportDir\apache-tuscany-sdo-incubating-1.0-M3\sdo
Export complete.
C:\Development\JiraDev\M3Release\RC1>gpg -sa --detach-sig --local-user kelvingoodson@apache.org apache-tuscany-sdo-incubating
-1.0-M3-api-src.tar.gz