XUnit is a unit of length.

SQLColumnPrivileges[conn] returns a table of access rights about the columns in an SQL connection.

SQLTableExportedKeys[conn] returns a table of foreign key descriptions that reference the table's primary key.

SQLTableImportedKeys[conn] returns a table of primary key descriptions that are referenced by the table's foreign key.

SQLTableIndexInformation[conn] returns a table of indices and statistics for a table.

SQLTablePrimaryKeys[conn] returns a table of primary key descriptions.

SQLTablePrivileges[conn] returns a table of access rights about the tables in an SQL connection.

EndModal[] is the head of an expression sent by Java to signal the end of a DoModal[] loop.

GetComplexClass[] returns the Java class used for complex numbers sent from, and returned to, Mathematica.

GetJVM[link] returns the JVM expression that corresponds to link, which was returned from InstallJava.