What do you mean by use IEEE.std_logic_1164.all

Course Context and Overview:
The course consists of laboratory tasks dealing with Digital Circuits. This is a rigorous
introductory laboratory course in Electronics and Communication Engineering. It is a credit
based laboratory course designed as a supplement to the Digital IC Applications theory
course. The software Xilinx is used to design any type of digital circuits and this laboratory
will be helpful to do the front end design of digital circuits. After verifying the design in the
software the designer will move to back end for production of physical device.
Course Prerequisites:
Digital IC Applications
Literature
Faculty Manual
Books Recommended:
Text Books:
1. John F. Wakerly., J. Bhasker. Weste and Eshraghian
Reference Books:
1. Digital System Design Using VHDL – Charles H. Roth Jr., PWS Publications,1998.
2. Introduction to Logic Design – Alan B. Marcovitz,TMH,2nd Edition,2005.
3. Chip Design for Submicron VLSI: CMOS Layout & Simulation, - John P. Uyemura,
Thomson Learning.
4. Introduction to VLSI Circuits and Systems - John .P. Uyemura, JohnWiley, 2003.
more refrence:http://raghuinstechdownloads/ece/lab/III-I/DSD&DICA%20LAB.pdf