This is good. I'm left wondering about a couple of thing. - Would a parallel standard be useful that allows the rel="" and type="" attributes of <a> to signal

This is good. I'm left wondering about a couple of thing. - Would a parallel standard be useful that allows the rel="" and type="" attributes of <a> to signal the kind of app (for mobile and desktop) that could better handle the resource than the browser? I've been enamored with this idea of general cross-linking between browsers and native apps for quite a while, but it seems like a pipe dream. - Is it even possible to have general data types that multiple apps can handle (and what would the selection UI look like for that)? Think lat/long for mapping apps, addresses (for a variety of apps), events (time/data/address), etc. I should add that the referring app UI for iOS is clever, great job whoever thought of that.