ID for language-invariant strings

[Stephane Bortzmeyer]

On Wed, Mar 12, 2008 at 10:04:47PM -0700,
 Peter Constable <petercon at microsoft.com> wrote 
 a message of 232 lines which said:

> we also need to support entries that have a reference name that is
> considered a language-neutral form of a name for a given entity.
[...]
> these would be strings intended for programmatic operation 

x-neutral ? x-ident ?