Motives (Seattle, WA, 1991), 447--523, Proc. Sympos. Pure Math., 55, Part 2, Amer. Math. Soc., Providence, RI, 1994.
See xnotes for a corrected version of the article.

Comment

The following footnote was removed from both articles by the AMS without the author's permission:

Not supported by the ICS, CIA, NRO, DSRP, NSA, DIA, USAF, Army, ONI, TIARA, INR, DOE, FBI, or any other intelligence agency of the United States government.

Also numerous changes were made to the article by a copy editor who neither understood the text nor recognized that even a minor change can affect the meaning.

Finally, the author's standard (Chicago Manual of Style) method of citation was changed by the AMS to a barbaric numbering system, and (of course) they got it wrong.

I recommend reading the original manuscripts, available on my web site, rather than the published version.

Erratum

In the following, the page numbers refer to the manuscripts.

p5, 1b $h_{\text{Hdg}}\colon\mathbb{S}\rightarrow(G_{\text{Hdg}% })_{\mathbb{R}{}}$ (the last subscript was omitted).

p7, 1t $h_{\text{Mab}}\colon\mathbb{S}\rightarrow(G_{\text{Mab}% })_{\mathbb{R}{}}$ (the last subscript was omitted).

p46. There should be a continuity condition in the statement of Lemma 3.23 --- see my paper: Descent for Shimura Varieties.

p65. Delete: (not necessarily Noetherian) --- in fact, I prove that they are Noetherian.