Implementation note: Technically you can come across FTP links, however rare these days (and browsers have stopped supporting them for whatever reason). It's possible we'll have academia using IPFS or something soon enough too. The appropriate way to deal with this is to have a whitelist that it applies to (not configurable per style), not to do it blindly. FTP and IPFS links should not have the protocol stripped because they're not implied by overwhelming common usage like http/https are.

Http/https should be the only ones. I'd also strip tel: and mailto: regardless of the flag, but not very important.

Yep, this would only apply to http/https and I think only to the URL field

That's not ready for review, right?

It's ready for review. It's just adding the one style attribute we discussed in the linked issue

But this commit only adds this to the list of possible options on cs:style. However, I think it does not define possible values for that option. Cf., e.g., this:

style.initialize-with-hyphen =
    
    ## Specify whether compound given names (e.g., "Jean-Luc") are
    ## initialized with ("J-L") or without a hyphen ("JL").
    [ a:defaultValue = "true" ]
attribute initialize-with-hyphen { xsd:boolean }?

So, I'd think something similar would be needed:

style.strip-url-protocol =
    
    ## Specify whether http/https should be stripped from urls
    [ a:defaultValue = "true" ]
attribute strip-url-protocol { xsd:boolean }?

Should the default value be true or false?

FWIW, relax ng doesn't truly support default values.

We include them for documentation purposes, where I think it does help add to the clarity.

@denismaier ah, right. Can you add that? Default to false

I don't know how to commit directly to your PR, but I'll add this as a suggestion.