Ancestry.com Family Trees
Ancestry.com Family Trees are GEDCOM files downloaded from Ancestry.com user-maintained trees. As of this writing, GEDCOM files may only be downloaded by the owner of the tree via the [Export Trees] button in the My Trees section.
Witnesses and Roles
It does not appear that Ancestry.com Family Trees support witnesses or roles. Gedcom Publisher assigns the role "Principal" to the person who owns an individual event, or to the husband and wife attached to a marriage or other family event.
It does not appear that Ancestry.com Family Trees includes sentence templates in its GEDCOM export.
GEDCOM files exported by Ancestry.com Family Trees often include media file references that use URLs to refer to web pages. Gedcom Publisher treats these as URL exhibits, external documents that are assumed to be available at the given URL. Gedcom Publisher does not attempt to download the document and does not check the URL for validity. When making the book, Gedcom Publisher inserts a link to the URL where the exhibit would normally appear.