I think probably all of your questions can be answered though just
downloading their full extract (their catalog dump) and querying the data.
See https://www.hathitrust.org/hathifiles.

You could contact their support email address too, listed on their contact
info at https://www.hathitrust.org/contact.

-Charlie Morris
Penn State University Libraries

On Sun, Dec 13, 2020 at 7:19 PM Eric Lease Morgan <[log in to unmask]> wrote:

> I have three HathiTrust technical support questions that maybe somebody
> here can answer:
>
>   * Technical Support Question #1: How can I get a list of all the
>     HathiTrust identifiers pointing to items contributed by the
>     University of Notre Dame?
>
>   * Technical Support Question #2: How do I limit the result of
>     Question #1 to only items which are 100% free and open access to
>     the world?
>
>   * Technical Support Question #3: How do I get a list of all
>     HathiTrust identifiers which are 100% free and open access to the
>     world AND owned by the University of Notre Dame?
>
> Inquiring minds would like to know.  :)
>
> --
> Eric Morgan
> University of Notre Dame
>