suppress-script values for fil, mi, pes, prs, qu members

Doug Ewell doug at
Wed Oct 20 23:18:01 CEST 2010

Peter Constable <petercon at microsoft dot com> wrote:

> pre-4646 habits of not using script subtags have persisted beyond 
> publication of 4646.

This isn't just force of habit.  RFC 5646, Section 4.1 says clearly, "A 
subtag SHOULD only be used when it adds useful distinguishing 
information to the tag."

In many cases, perhaps even most, a tag that says "Huallaga Huánuco 
Quechua, written in the Latin script" might not add useful 
distinguishing information beyond one that says simply "Huallaga Huánuco 
Quechua."  A search engine (in the general data-processing sense, not 
just in the Google/Bing/Yahoo! sense) already knows what characters are 
used in a given piece of text; it doesn't need to be told.

The value of S-S lies in the ability to match tag or range A, which has 
a script subtag, with tag or range B, which doesn't.

Doug Ewell | Thornton, Colorado, USA |
RFC 5645, 4645, UTN #14 | ietf-languages @ is dot gd slash 2kf0s ­

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