(About the <toplabel> thread in SPF-discuss) Wait a moment...
toplabel =
( *alphanum alpha *alphanum ) /
( 1*alphanum "-" *( alphanum / "-" ) alphanum )
...it's simple to add the "no single alpha" case to this beast:
| toplabel =
| ( alpha 1*alphanum ) / ( 1*digit alpha *alphanum ) /
| ( 1*alphanum "-" *( alphanum / "-" ) alphanum )
I'll propose that for USEFOR, it's clearer than the convoluted
syntax based on <label>. It's also unambiguous for a parser -
credits to Matthew.van.Eerde, copy to USEFOR.
Bye, Frank
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