What is "1#" in rfc2616

Question

I'm reading the http standard in rfc2616. Now I want to get the format of If-None-Match. It gives me:

If-None-Match = "If-None-Match" ":" ( "*" | 1#entity-tag )

What is the 1# ? Or dose 1#entity-tag means the exact of ETag ?

Keith Thompson · Accepted Answer · 2015-07-03T17:29:43.737

4

It means 1 or more occurrences of "entity-tag".

The syntax is explained in the RFC, in section 2.1, "Augmented BNF":

Important note: RFC 2616 is obsolete. It's been superseded by a series of 6 RFCs: 7230, 7231, 7232, 7233, 7234, 7235. See https://www.mnot.net/blog/2014/06/07/rfc2616_is_dead

edited Jul 03 '15 at 17:29

answered Jul 01 '15 at 01:30

Keith Thompson

1

Right, but the correct spec to look at is – Julian Reschke Jul 01 '15 at 05:35

1 Answers1