Issue: Review deprecated and new html tags

I just did a search and VaultWiki on XenForo 1.x does not include any data-vocabulary tags. VaultWiki only uses schema.org tags. Possibly some are deprecated; that is reasonable to review. However, a number of default XenForo 1.x templates do use data-vocabulary tags. That would be up to the XenForo devs to review and update (I doubt they will, since XenForo 1.x is no longer supported by them). You had reported one such instance of this in the past and it ended up being a XenForo bug that they fixed: https://www.vaultwiki.org/issues/5522/

In general, a large scale review for VaultWiki for XenForo 1.x is unlikely to occur, since we are slated to retire 1.x support in the next branch (4.2), which is already heavily into development. The review would be performed for VaultWiki for XenForo 2.1.x+. However, if there are specific instances of outdated tags that you find in the mean time and report as bugs, they could be fixed for XenForo 1.x on an individual basis (as you noted an instance of rel=print).

Marking this task as completed for the next release.

The following in-use REL attribute values were dropped from the spec:
- translation: This has been changed to alternate with additionally setting the LANG attribute to the language-code of the target translation.
- editor: Contributors who are not the creator now have no REL.
- collection: This has been changed to contents (more on "contents" below).

The following in-use REL attribute values were used incorrectly:
- contents: These have been mostly removed, except where the usage is appropriate (the linked "contents" are supposed to be a listing that includes the current page, not a listing of content under the current page).

The following REL attributes have been implemented:
- discussion: Added to links to a page's Comments tab and its spinoff discussion links.
- chapter: Applied more consistently to chapter links. Supposedly this was removed from the HTML5 spec, but it's still listed and validates. We'll see if we have to remove this in the future.

The schema.org package that we bundled for use with custom fields has also been updated from version 7.04 to version 13.0. From what I could see in the release notes, no schema.org datatypes or properties were removed.

This closes this task. As stated earlier, in the future, if there is any one invalid/deprecated/dropped REL value, it should be reported on an individual basis.

Thanks!