[i18n-activity] Can service name include non-ASCII? (#1522)

aphillips has just created a new issue for https://github.com/w3c/i18n-activity:

== Can service name include non-ASCII? ==
## Proposed comment

6.3 DNS-Based Service Discovery
https://w3c.github.io/wot-discovery/#introduction-dns-sd

> In DNS-SD, format of the Service Instance Name is Instance.Service.Domain. The Service part is a pair of labels following the conventions of [[RFC2782](https://w3c.github.io/wot-discovery/#bib-rfc2782)]. The first label has an underscore followed by the Service Name, and the second label describes the protocol.

RFC2782 allows for the definition of entries in a DNS record where the service is given an arbitrary name introduced by an underscore (`_myservice`). The protocol can then be identified from a second label (`_tcp`) giving a DNS name like `_myservice._tcp.example.com`. 

Given that these are presumably A-labels, are service names limited to IDNA-valid names? Should service names that are non-ASCII be allowed at all? Assuming that they are, probably there needs to be some callout about limitations.

## Instructions: 

This follows the process at https://w3c.github.io/i18n-activity/guidelines/review-instructions.html

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4. After discussion with the i18n WG, raise an issue in the repository of the WG that owns the spec. Use the text above these instructions as the starting point for that comment, but add any suggestions that arose from the i18n WG. In the other WG's repo, add an 'i18n-needs-resolution' label to the new issue. If you think any of the participants in layout requirements task force groups would be interested in following the discussion, add also the appropriate i18n-\*lreq label(s).

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Received on Thursday, 28 April 2022 18:51:01 UTC