The CRS Annotated Constitution is offered through Cornell's Legal Information Institute (LII). LII describes the product below:
The content of the CRS Annotated Constitution was prepared by the Congressional Research Service (CRS) at the Library of Congress, and published electronically in plaintext and PDF by the Government Printing Office. Dating back to 1964, the initial online annotations were published in 1992, and supplements were released in 1994, 1996, 1998, and 2000. This edition is a hypertext interpretation of the CRS text. It links to Supreme Court opinions, the U.S. Code, and the Code of Federal Regulations, as well as enhancing navigation through linked footnotes and tables of contents.