LDIF is an acronym of LDAP Data Interchange Format.
LDIF (LDAP Data Interchange Format) is the main file format used to import or export data from a global Lightweight Directory Access Protocol (LDAP) or an LDAP database. LDIF files are ASCII text files that represent data in a format that is recognizable to an LDAP directory, or database.
To create an LDIF format file, you can use a regular Notepad with (each line in your file ended with a carriage return) newline-delimited paragraph. One instance where the file format is used in Documentum is to import a text file to populate the user table. For details in how to import a text file, please refer to Documentum Server Administrator's Guide.