Virtual directory

A virtual directory is a server for a directory protocol such as LDAP, but unlike a traditional directory server, does not master the data itself in its own database. Instead a virtual directory will dynamically translate requests it receives to operations in other protocols or data models, such as to a relational database. In contrast to most metadirectory technologies, virtual directory implementations typically offer a simpler administration model, and may be more appropriate to environments where the bulk transfer of changes are inappropriate.