An ADS file is a specification file for an Ada programming project. It is similar to a class for Java, or the header and implementation pair in case of C++. The public and private specifications of the Ada package are stored in the .ads file. The, .adb file, in contrast contains the implementation, or Ada bodies. Like C++, Ada offers separation between specifications and implementations independent of OOP.
ADS files can be opened in any text editor such as Microsoft Notepad, Notepad++, and Atom.
ADS File Format
ADS files are in simple plain text file format and can be opened/edited with any text editor. Ada packages can be organized into hierarchies. A child unit can be declared in the following way:
package Root.Child is
-- package spec goes here
package body Root.Child is
-- package body goes here