Ah Martin... if you only knew the disagreements I've had with Elizabeth Shown Mills (author of the "bible" on Sources, Evidence Explained) on this topic. We'd be on the same side, you and me. She makes the case that Ancestry.com is a publication not a repository. She would refer to the general World Wide Web as a repository. In the case of Ancestry.com, the publisher is Generations Network, Inc.-- the owners of Ancestry.com... And if you look at how Ancestry.com displays its source citation at the bottom of most pages when looking at a record, they follow this same format.
Elizabeth is the recognized expert in the field-- at least in the U.S.-- and the certifying body that will ultimately make the decision about my certification when I go for it, concurs with her. I've stopped arguing.
I do agree with her that a marriage certificate published via Ancestry.com (or any other web site) is different from an original marriage certificate that you hold in your hand. And that the point of providing source information is to help the reader a) try to find it themselves and b) judge the quality of it as a piece of evidence.
Frankly, as long as those distinctions are made clear here, I don't care so much about what we call a source and repository-- I just want to encourage people to be a bit more exact in describing where they got their evidence. Heck, I'd be a lot happier if people said ANYTHING about where they got their evidence.
-- Jillaine
P.S. if you look at the source page on werelate that I linked to above you'll see that WeRelate chose NOT to follow ESM on the definition of Ancestry.com as a publication, but instead refers to it as a repository. ;-)