Actually, the sitemap.org protocol allows for a sitemap to include
references to multiple child sitemaps
Which is what we did at my former employer:
And thus the robots.txt only includes a single sitemap:
When we add extra collections, it just goes into the sitemap.xml, so we are
not continuously updating the robots.txt.
On Fri, Feb 1, 2013 at 11:33 AM, Sullivan, Mark V <[log in to unmask]>wrote:
> You may want to allow people just to give you the robots.txt file which
> references the sitemap. I also register the sitemaps individually with the
> big search engines for our site, but I found that very large sitemaps
> aren't processed very well. So, for our site I think I limited the number
> of items per sitemap to 40,000. Which results in ten sitemaps for the
> digital objects and an additional sitemap for all the collections.
> Or else perhaps give more boxes, so we can include all the sitemaps
> utilized in our systems.
> Mark V Sullivan
> Digital Development and Web Coordinator
> Technology and Support Services
> University of Florida Libraries
> 352-273-2907 (office)
> 352-682-9692 (mobile)
> [log in to unmask]
> From: Code for Libraries [[log in to unmask]] on behalf of Jason
> Ronallo [[log in to unmask]]
> Sent: Friday, February 01, 2013 11:14 AM
> To: [log in to unmask]
> Subject: [CODE4LIB] digital collections sitemaps
> I've seen registries for digital collections that make their metadata
> available through OAI-PMH, but I have yet to see a listing of digital
> collections that just make their resources available on the Web the
> way the Web works . Sitemaps are the main mechanism for listing Web
> resources for automated crawlers . Knowing about all of these
> various sitemaps could have many uses for research and improving the
> discoverability of digital collections on the open Web .
> So I thought I'd put up a quick form to start collecting digital
> collections sitemaps. One required field for the sitemap itself.
> Please take a few seconds to add any digital collections sitemaps you
> know about--they don't necessarily have to be yours.
> At this point I'll make the data available to anyone that asks for it.
> Thank you,
>  At least I don't recall seeing such a sitemap registry site or
> service. If you know of an existing registry of digital collections
> sitemaps, please let me know about it!
>  http://www.sitemaps.org/ For more information on robots see
>  For instance you can see how I've started to investigate whether
> digital collections are being crawled by the Common Crawl: