| Db | Pure virtual class for database interaction |
| DbError | Class representing a Database specific error |
| DbPsql | Class derived from Db implementing support for the Postgresql Database |
| DdtException | Generic exception class for DDT |
| Dns | Class to make Dynamic Name Server updates |
| DnsBind | Class to make Dynamic Name Server updates using the bind nameserver |
| DnsNull | Dns driver that does nothing (for debug and dns servers that use a backend db common with ddtd) |
| dnsRecord | Structure to hold the DNS record informations |
| Logger | Class for interaction with the syslog and file logging |
| Mutex | This class is a wrapper for the system pthread_mutex |
| userAccount | Structure to hold user account informations |
