usefor-article-07 May 2002
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5.6.4. Path-Delimiter Summary
A summary of the various path-delimiters. The name immediately to the
left of the path-delimiter is always that of the machine which added
the path-delimiter.
'/' The name immediately to the right is known to be the identity of
the machine from which the article was received (either because
the entry was made by that machine and we have verified it, or
because we have added it ourselves).
'?' The name immediately to the right is the claimed identity of the
machine from which the article was received, but we were unable
to verify it (and have prepended our own view of where it came
from, and then a '/').
'%' Everything to the right is the pre-injection region followed by
the tail-entry. The name on the left is the FQDN of the
injecting agent. The presence of two '%'s in a path indicates a
double-injection (see 8.2.2).
'!' The name immediately to the right is unverified. The presence of
a '!' to the left of the '%' indicates that the identity to the
left is that of an old-style system not conformant with this
standard.
',' Reserved for future use, treat as '/'.
Other
Old software may possibly use other path-delimiters, which should
be treated as '!'. But note in particular that ':', '-' and '_'
are components of names, not path-delimiters, and FWS on its own
MUST NOT be used as the sole path-delimiter.
NOTE: Old Netnews relaying and injecting agents almost all
delimit Path entries with a '!', and these entries are not
verified. The presence of '%' indicates that the article was
injected by software conforming to this standard, and the
presence of '!' to the left of a '%' indicates that the message
passed through systems developed prior to this standard. It is
anticipated that relaying agents will reject articles in the old
style once this new standard has been widely adopted.
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