El Martes, 2 de Febrero de 2010, Stephen Paterson escribió:
> Thanks Inaki,
> Any reference for this?
Read the RFC about ABNF grammar: RFC 2234.
Look for the word "case":
----------------------------
2. RULE DEFINITION
2.1 Rule Naming
The name of a rule is simply the name itself; that is, a sequence of
characters, beginning with an alphabetic character, and followed by
a combination of alphabetics, digits and hyphens (dashes).
NOTE: Rule names are case-insensitive
[...]
page 4:
Literal text strings are interpreted as a concatenated set of
printable characters.
NOTE: ABNF strings are case-insensitive and
the character set for these strings is us-ascii.
Hence:
rulename = "abc"
and:
rulename = "aBc"
will match "abc", "Abc", "aBc", "abC", "ABc", "aBC", "AbC" and "ABC".
To specify a rule which IS case SENSITIVE,
specify the characters individually.
For example:
rulename = %d97 %d98 %d99
or
rulename = %d97.98.99
will match only the string which comprises only lowercased
characters, abc.
--------------------------------------
For example, SIP METHOD's are defined as case *sensitive* in this way (RFC
3261):
INVITEm = %x49.4E.56.49.54.45 ; INVITE in caps
--
Iñaki Baz Castillo <[email protected]>
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