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RE: RFC2252 wshp and other ABNF issues
That works for me... Thanks Kurt!
Ryan
-----Original Message-----
From: Kurt D. Zeilenga [mailto:Kurt@OpenLDAP.org]
Sent: Thursday, February 08, 2001 7:12 PM
To: Ryan Moats
Cc: ietf-ldapbis@OpenLDAP.org
Subject: RE: RFC2252 wshp and other ABNF issues
At 12:58 PM 2/8/01 -0600, Ryan Moats wrote:
>On the whitespace issue, I like the idea and look
>forward to the ABNF.
For the whitespace issue (only), I suggest replacing
the following common productions in section 4.1 as
follows:
qdstring = "'" dstring "'"
qdstringlist = [ qdstring *( space qdstring ) ]
qdstrings = qdstring / ( "(" whsp qdstring whsp ")" )
oids = oid / ( "(" whsp oidlist whsp ")" )
oidlist = oid * ( whsp "$" whsp oid )
qdescrs = qdescr / ( "(" whsp qdescrlist whsp ")" )
qdescrlist = [ qdescr *( whsp qdescr ) ]
qdescr = "'" descr "'"
and remove production woid. Then, rewrite AttributeTypeDescription
as follows:
AttributeTypeDescription = "(" whsp
numericoid ; AttributeType identifier
[ space "NAME" space qdescrs ] ; name used in AttributeType
[ space "DESC" space qdstring ] ; description
[ space "OBSOLETE" ]
[ space "SUP" space oid ] ; derived from this other
; AttributeType
[ space "EQUALITY" space oid ; Matching Rule name
[ space "ORDERING" space oid ; Matching Rule name
[ space "SUBSTR" space oid ] ; Matching Rule name
[ space "SYNTAX" space noidlen ] ; see section 4.3
[ space "SINGLE-VALUE" ] ; default multi-valued
[ space "COLLECTIVE" ] ; default not collective
[ space "NO-USER-MODIFICATION" ] ; default user modifiable
[ space "USAGE" space AttributeUsage ] ; default userApplications
whsp ")"
And likewise for other schema description syntaxes. Also
text like:
Terms whose identifier begins with "X-" are reserved for
private experiments, and MUST be followed by a <qdstrings>
encoding.
would be replaced with:
Terms whose identifier begins with "X-" are reserved for
private experiments, and MUST be followed by a <space> and
a <qdstrings> encodings.
which actually likely should be folded into the ABNF as well.
xstring = "X-" 1*( a / "-" / "_" )
then in each add to the optional fields
*[ space xstring space qdstrings ] ; extensions
I note that 2252 didn't specify what the characters can be used
in a xstring, I just picked this a reasonable set which I hope
includes all current private experiments.
>On quoting, do we need \ hex or can we live with \ char?
I actually like Steven's suggestion to use "'" to escape "'".
I believe this could be specified as simply as:
utf8 = <any sequence of octets formed from the UTF-8 [9]
transformation of a character from ISO10646 [10]
except "'">
dstring = 1*( utf8 / "''" ) ; escaped utf8 string, each "'"
; appearing in the value to be encoded is
; escaped by a proceeding "'"