 The new library is based on the vCard standard and has provisions for being extended by additional backends such as LDAP and database servers.K Desktop Environment 3.1 introduced new default window (Keramik) and icon (Crystal) styles as well as several feature enhancements.The update included greatly improved LDAP integration throughout Kontact, enhanced security for KMail (S/MIME, PGP/MIME and X.509v3 support) and Microsoft Exchange 2000 compatibility for KOrganizer.