Greenstone project Greenstone project true Demonstration collection using MGPP for the indexer and GDBM for the database. This is a demonstration collection for the Greenstone3 digital library software. It contains a small subset (11 books) from the Humanity Development Library. It is the Greenstone 3 equivalent of the Greenstone 2 demo collection, built with MGPP and GDBM. MGPP demo : Untitled MGPP demo collection A demo collection for greenstone, using MGPP and GDBM.