glfs/content/content.ent

<!ENTITY content SYSTEM "content.xml">

<!-- Database software -->
<!ENTITY content-databases SYSTEM "databases/databases.xml">
<!ENTITY % db SYSTEM "databases/db/db.ent">
<!ENTITY % mysql SYSTEM "databases/mysql/mysql.ent">
<!ENTITY % postgres SYSTEM "databases/postgres/postgres.ent">
%db;
%mysql;
%postgres;

<!-- Web server software -->
<!ENTITY content-web SYSTEM "web/web.xml">
<!ENTITY % apache SYSTEM "web/apache/apache.ent">
<!ENTITY % php SYSTEM "web/php/php.ent">
%apache;
%php;