Make taxonomy sitemaps adhere to pagination too about wordpress-seo

[jdevalk]

Altered the description and title of the original issue to reflect what needs doing ;)

[echoLP]

My latest commit has pagination for taxonomy sitemaps, but how should last modified timestamp on the root sitemap_index.xml work for this? My current implementation works as follow:

Lets say the taxonomy is post_tags and you have 100 terms. Pagination limit is set to 25, so you'll have 25 terms per sitemap. For post_tag-sitemap1.xml, I query all post types that is associated with the first 25 terms, grab the one with the highest post_modified_gmt and use that for the last modified timestamp. post_tag-sitemap2.xml will be the second set of 25 terms and so forth.

Under this implementation there's no particular order between post_tag-sitemap1.xml, post_tag-sitemap2.xml, post_tag-sitemap3.xml, etc which may screw up the expected sitemap format. Thoughts?

[jdevalk]

That looks fine to me... Given it a test run and not really seeing weird things.