<!ENTITY intro                  SYSTEM "Introduction.docbook">

<!ENTITY intro-history          SYSTEM "Introduction/History.docbook">
<!ENTITY intro-history-2009     SYSTEM "Introduction/History/2009.docbook">
<!ENTITY intro-history-2010     SYSTEM "Introduction/History/2010.docbook">
<!ENTITY intro-history-2011     SYSTEM "Introduction/History/2011.docbook">

<!ENTITY intro-copying          SYSTEM "Introduction/Copying.docbook">
<!ENTITY intro-copying-preamble SYSTEM "Introduction/Copying/preamble.docbook">

<!ENTITY intro-docconvs         SYSTEM "Introduction/Docconvs.docbook">
<!ENTITY intro-usage            SYSTEM "Introduction/Repoconvs.docbook">
<!ENTITY intro-feedback         SYSTEM "Introduction/Feedback.docbook">