What is a data directory?

data directory: An inventory that specifies the source, location, ownership, usage, and destination of all of the data elements that are stored in a database.

What does Directory mean in Linux?

A directory is a file the solo job of which is to store the file names and the related information. All the files, whether ordinary, special, or directory, are contained in directories. Unix uses a hierarchical structure for organizing files and directories. This structure is often referred to as a directory tree.