Street Addresses

Hi Adapt TF:

I ran into a very current discussion about addresses and autofill. It
suggests that our address-level names may not be the most up-to-date best
practice to support all cultures.

In https://www.w3.org/TR/adapt-content/#description-1 we support four
administrative levels:

   - - address-level1: The broadest administrative level in the address,
   i.e., the province within which the locality is found; for example, in the
   US, this would be the state; in Switzerland it would be the canton; in the
   UK, the post town.
   - - address-level2: The second administrative level, in addresses with
   two or more administrative levels; in the countries with two administrative
   levels, this would typically be the city, town, village, or other locality
   within which the relevant street address is found.
   - - address-level3: The third administrative level, in addresses with
   three or more administrative levels.
   - - address-level4: The most fine-grained administrative level, in
   addresses with four administrative levels.

A lengthy discussion of the limitations of autocomplete here (
https://github.com/whatwg/html/issues/4986) led to Dominic Battre proposing
a  "street-address" that includes new lines, and "address-line1, 2, 3" to
follow on. His proposal is here,
https://github.com/battre/autocomplete-attribute-explainer/tree/main

Was this robust discussion taken into account when we settled on "level 1,
level2" etc.? Shall we open the door to discussion about this while we are
entering candidate review?

- Lionel

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