The Preamble to the Bill of Rights is missing:
This is generally considered the preamble, and is included:
We the people of the United States, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America. The section you posted dealing with the administrative procedures for the Bill of Rights is not generally considered part of our Constitution.
Fine. But if one is constructing an informational web site on the U.S. Constitution, the Preamble contains information crucial to the understanding of the Bill of Rights.
The Preamble emphasizes that the BOR was added to the U.S. Constitution to further restrict the powers of the federal government.