view Side-By-Side changes
Network Working Group M. Wahl
INTERNET-DRAFT Critical Angle Inc.
Obsoletes: RFC 1778 A. Coulbeck
Isode Limited
T. Howes
Netscape Communications Corp.
S. Kille
Isode Limited
Intended Category: Standards Track 24 March 6 June 1997
Lightweight Directory Access Protocol (v3):
Attribute Syntax Definitions
<draft-ietf-asid-ldapv3-attributes-04.txt>
<draft-ietf-asid-ldapv3-attributes-05.txt>
1. Status of this Memo
This document is an Internet-Draft. Internet-Drafts are working
documents of the Internet Engineering Task Force (IETF), its areas, and
its working groups. Note that other groups may also distribute working
documents as Internet-Drafts.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference material
or to cite them other than as "work in progress."
To learn the current status of any Internet-Draft, please check the
"1id-abstracts.txt" listing contained in the Internet-Drafts Shadow
Directories on ds.internic.net (US East Coast), nic.nordu.net (Europe),
ftp.isi.edu (US West Coast), or munnari.oz.au (Pacific Rim).
2. Abstract
The Lightweight Directory Access Protocol (LDAP) [1] requires that
the contents of AttributeValue fields in protocol elements be octet
strings. This document defines a set of syntaxes for LDAPv3, and the
rules by which attribute values of these syntaxes are represented as
octet strings for transmission in the LDAP protocol. The syntaxes
defined in this document are referenced by this and other documents
that define attribute types. This document also defines the set of
attribute types which LDAP servers should support.
3. Overview
This document defines the framework for developing schemas for
directories accessible via the Lightweight Directory Access Protocol.
Schema is the collection of attribute type definitions, object class
definitions and other information which a server uses to determine
how to match a filter or attribute value assertion (in a compare
operation) against the attributes of an entry, and whether to permit
add and modify operations.
Section 4 states the general requirements and notations for attribute
types, object classes, syntax and matching rule definitions.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 1
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
Section 5 lists attributes, section 6 syntaxes and section 7 object
classes.
Additional documents define schemas for representing real-world
objects as directory entries.
4. General Issues
This document describes encodings used in an Internet protocol. Terms
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in
this document are
defined to be interpreted as described in RFC 2119 [4].
Wahl, Coulbeck, Howes, Kille Page 1
INTERNET-DRAFT
4.1. Common Encoding Aspects
For the purposes of defining the encoding rules for attribute
syntaxes, the following BNF definitions will be used. They are
based on the BNF styles of RFC 822 [13].
a = "a" / "b" / "c" / "d" / "e" / "f" / "g" / "h" / "i" /
"j" / "k" / "l" / "m" / "n" / "o" / "p" / "q" / "r" /
"s" / "t" / "u" / "v" / "w" / "x" / "y" / "z" / "A" /
"B" / "C" / "D" / "E" / "F" / "G" / "H" / "I" / "J" /
"K" / "L" / "M" / "N" / "O" / "P" / "Q" / "R" / "S" /
"T" / "U" / "V" / "W" / "X" / "Y" / "Z"
d = "0" / "1" / "2" / "3" / "4" /
"5" / "6" / "7" / "8" / "9"
hex-digit = d / "a" / "b" / "c" / "d" / "e" / "f" /
"A" / "B" / "C" / "D" / "E" / "F"
k = a / d / "-"
p = a / d / """ / "(" / ")" / "+" / "," /
"-" / "." / "/" / ":" / "?" / " "
letterstring = 1*a
numericstring = 1*d
anhstring = 1*k
keystring = a [ anhstring ]
printablestring = 1*p
space = 1*" "
whsp = [ space ]
utf8 = <any sequence of octets formed from the UTF-8 [9]
transformation of a character from ISO10646 [10]>
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Definitions March Defns. Page 2
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
4.1. Attribute Types
The attribute types are described by sample values
dstring = 1*utf8
qdstring = whsp "'" dstring "'" whsp
qdstringlist = ( qdstringlist qdstring ) / ""
qdstrings = qdstring / ( whsp "(" qdstringlist ")" whsp )
In the following BNF for the subschema
"attributeTypes" attribute, which string representation of OBJECT
IDENTIFIERs, descr is written the syntactic representation of an object
descriptor, which consists of letters and digits, starting with a
letter. An OBJECT IDENTIFIER in the
AttributeTypeDescription syntax. While lines numericoid format should not
have been folded for
readability, the leading zeroes (e.g. "0.9.3" is permitted but "0.09.3" should
not be generated).
When encoding values transferred in protocol would not contain
newlines.
The AttributeTypeDescription is encoded according to syntax, the following BNF,
and descr encoding option SHOULD
be used in preference to the productions numericoid. An object descriptor is
a more readable alias for <oid>, <DirectoryStrings> a number OBJECT IDENTIFIER, and <DirectoryString>
are given these
(where assigned and known by the implementation) SHOULD be used in sections 4.2.1.
<AttributeTypeDescription> ::= "("
<oid> -- AttributeType identifier
[ "NAME" <DirectoryStrings>
preference to numeric oids to the greatest extent possible.
Examples of object descriptors in LDAP are attribute type, object
class and matching rule names.
oid = descr / numericoid
descr = keystring
numericoid = numericstring *( "." numericstring )
woid = whsp oid whsp
; set of oids of either form
oids = woid / ( "(" oidlist ")" )
oidlist = woid *( "$" woid )
; object descriptors used as schema element names
qdescrs = qdescr / ( whsp "(" qdescrlist ")" whsp )
qdescrlist = ( qdescrlist qdescr ) / ""
qdescr = whsp "'" descr "'" whsp
4.2. Attribute Types
The attribute types are described by sample values for the subschema
"attributeTypes" attribute, which is written in the
AttributeTypeDescription syntax. While lines have been folded for
readability, the values transferred in protocol would not contain
newlines.
The AttributeTypeDescription is encoded according to the following
BNF, and the productions for oid, qdsescrs and qdstring are given
in section 4.1. Implementors should note that future versions of this
document may have expanded this BNF to include additional terms.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 3
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
AttributeTypeDescription = "(" whsp
numericoid whsp ; AttributeType identifier
[ "NAME" qdescrs ] -- ; name used in AttributeType
[ "DESC" <DirectoryString> qdstring ] ; description
[ "OBSOLETE" whsp ]
[ "SUP" <oid> woid ] -- ; derived from this other
; AttributeType
[ "EQUALITY" <oid> ] -- woid ; Matching Rule name
[ "ORDERING" <oid> ] -- woid ; Matching Rule name
[ "SUBSTR" <oid> woid ] -- ; Matching Rule name
[ "SYNTAX" <DirectoryString> whsp numericoid whsp ] -- ; see section 4.2
[ "SINGLE-VALUE" whsp ] -- ; default multi-valued
[ "COLLECTIVE" whsp ] -- ; default not collective
[ "NO-USER-MODIFICATION" ] -- whsp ]; default user modifiable
[ "USAGE" <AttributeUsage> ] -- whsp AttributeUsage ]; default user applications
whsp ")"
<AttributeUsage> ::=
AttributeUsage =
"userApplications"
| /
"directoryOperation"
| /
"distributedOperation" -- / ; DSA-shared
|
"dSAOperation" -- ; DSA-specific, value depends on server
Servers are not required to provide the same or any text
in the description part of the subschema values they maintain.
Servers SHOULD provide at least one of the "SUP" and "SYNTAX" fields
for each AttributeTypeDescription.
Servers SHOULD implement all the attribute types referenced in
section 5:
they 5. Servers MUST be able to evaluate presence filters,
SHOULD be able to perform equality matching of values, values of all user
attributes known to the server, and MAY be able to perform matching
with the other kinds of filters. If a server allows values of an
attribute of a particular type to be added or removed over protocol,
the server MUST be able to perform equality matching of values of
that attribute, but need not perform any additional validity checks
on attribute values.
Servers MAY recognize additional names and attributes not listed in
this document, and if they do so, SHOULD publish the definitions of
the types in the attributeTypes attribute of their subschema subentries.
entries.
AttributeDescriptions can be used as the value in a NAME part of an
AttributeTypeDescription. Note that these are case insensitive.
Note that the AttributeTypeDescription does not list the matching
rules which can can be used with that attribute type in an
extensibleMatch search filter. This is done using the matchingRuleUse
attribute described in section 4.4.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 4
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
4.2. Syntaxes
This section defines general requirements for LDAP attribute value
syntax encodings. All documents defining attribute syntax encodings
for use with LDAP are expected to conform to these requirements.
Wahl, Coulbeck, Howes, Kille Page 2
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
The encoding rules defined for a given attribute syntax must produce
octet strings. To the greatest extent possible, encoded octet
strings should be usable in their native encoded form for display
purposes. In particular, encoding rules for attribute syntaxes
defining non-binary values should produce strings that can be
displayed with little or no translation by clients implementing
LDAP. There are a few cases (e.g. Audio) audio) however, when it is not
sensible to produce a printable representation, and clients MUST NOT
assume that an unrecognized syntax is a string representation.
4.2.1. Common Encoding Aspects
In these encodings where an arbitrary string is used as part of a larger
production (other than a Distinguished Name), a backslash quoting
mechanism is used to encode the following separator symbol character
(such as ''',
'$' "'", "$" or '#') "#") if it should occur in that string. The
backslash is followed by a pair of hexadecimal digits representing the
next character. A backslash itself in the string which forms part of
a larger syntax is always transmitted as '\5C' or '\5c'.
For the purposes of defining the encoding rules
Syntaxes are also defined for attribute syntaxes,
the following auxiliary BNF definitions will be used:
<a> ::= 'a' | 'b' | 'c' | 'd' | 'e' | 'f' | 'g' | 'h' | 'i' |
'j' | 'k' | 'l' | 'm' | 'n' | 'o' | 'p' | 'q' | 'r' |
's' | 't' | 'u' | 'v' | 'w' | 'x' | 'y' | 'z' | 'A' |
'B' | 'C' | 'D' | 'E' | 'F' | 'G' | 'H' | 'I' | 'J' |
'K' | 'L' | 'M' | 'N' | 'O' | 'P' | 'Q' | 'R' | 'S' |
'T' | 'U' | 'V' | 'W' | 'X' | 'Y' | 'Z'
<d> ::= '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9'
<hex-digit> ::= <d> | 'a' | 'b' | 'c' | 'd' | 'e' | 'f' |
'A' | 'B' | 'C' | 'D' | 'E' | 'F'
<k> ::= <a> | <d> | '-'
<p> ::= <a> | <d> | ''' | '(' | ')' | '+' | ',' | '-' | '.' |
'/' | ':' | '?' | ' '
<letterstring> ::= <a> | <a> <letterstring>
<numericstring> ::= <d> | <d> <numericstring>
<keystring> ::= <a> | <a> <anhstring>
<anhstring> ::= <k> | <k> <anhstring>
<printablestring> ::= <p> | <p> <printablestring>
<space> ::= ' ' | ' ' <space>
<whsp> ::= <space> | empty
Wahl, Coulbeck, Howes, Kille Page 3
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
<utf8> ::= any sequence of octets formed matching rules whose assertion value
syntax is different from the UTF-8 [9]
transformation of a character from ISO 10646 [10]
<dstring> ::= <utf8> | <utf8> <dstring>
<DirectoryStrings> ::= <DirectoryString> | '(' <DirectoryStringList> ')'
<DirectoryStringList> ::= <DirectoryStringList> <DirectoryString> | ""
<DirectoryString> ::= ''' <dstring> '''
<oids> ::= <oid> | '(' <oidlist> ')'
<oidlist> ::= <oidlist> '$' <oid> | <oid>
4.2.2 attribute value syntax.
4.2.1 Binary Transfer of Values
This encoding format is used if the binary encoding is requested by
the client for an attribute, or if the attribute syntax name is 'Binary'.
"1.3.6.1.4.1.1466.115.121.1.5". The value, an instance of the ASN.1
AttributeValue type, is BER-encoded, subject to the restrictions of
section 5.1 of [1], and this sequence of octets is used as the value.
(E.g. the first byte inside the OCTET STRING wrapper is a tag byte.
However the OCTET STRING is still encoded in primitive form.)
All servers MUST implement this form for both generating attribute
values in search responses, and parsing attribute values in add,
compare and modify requests, if the attribute type is recognized and
the attribute syntax name is 'Binary'. that of Binary. Clients which request
that all attributes be returned from entries MUST be prepared receiving
to receive values in binary (e.g.
userCertificate or audio), userCertificate), and MUST SHOULD NOT
simply display binary or unrecognized values to users.
4.2.3.
4.2.2. Syntax Names
Names of syntaxes Object Identifiers
Syntaxes for use with LDAP are ASCII strings named by OBJECT IDENTIFIERs, which either
begin with a letter and contain only letters or digits. The names
are
case insensitive. Historically since syntaxes correspond dotted-decimal strings. These are not intended to ASN.1 types,
they be displayed
to users.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 5
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
The following table lists some of the syntaxes that have been named starting with defined
for LDAP thus far. The H-R column suggests whether a capital letter. value in that
syntax would likely be a human readable string. Clients and servers
need not implement all the syntaxes listed here, and MAY implement
other syntaxes.
Other documents may define additional syntaxes. However, the
definition of additional arbitrary syntaxes is strongly depreciated
since it will hinder interoperability: today's client and server
implementations generally do not have the ability to dynamically
recognize new syntaxes. In most cases attributes will be defined
with the syntax for directory strings.
Value being represented H-R OBJECT IDENTIFIER
=================================================================
ACI Item N 1.3.6.1.4.1.1466.115.121.1.1
Access Point Y 1.3.6.1.4.1.1466.115.121.1.2
Attribute Type Description Y 1.3.6.1.4.1.1466.115.121.1.3
Audio N 1.3.6.1.4.1.1466.115.121.1.4
Binary N 1.3.6.1.4.1.1466.115.121.1.5
Bit String Y 1.3.6.1.4.1.1466.115.121.1.6
Boolean Y 1.3.6.1.4.1.1466.115.121.1.7
Certificate N 1.3.6.1.4.1.1466.115.121.1.8
Certificate List N 1.3.6.1.4.1.1466.115.121.1.9
Certificate Pair N 1.3.6.1.4.1.1466.115.121.1.10
Country String Y 1.3.6.1.4.1.1466.115.121.1.11
DN Y 1.3.6.1.4.1.1466.115.121.1.12
Data Quality Syntax Y 1.3.6.1.4.1.1466.115.121.1.13
Delivery Method Y 1.3.6.1.4.1.1466.115.121.1.14
Directory String Y 1.3.6.1.4.1.1466.115.121.1.15
DIT Content Rule Description Y 1.3.6.1.4.1.1466.115.121.1.16
DIT Structure Rule Description Y 1.3.6.1.4.1.1466.115.121.1.17
DL Submit Permission Y 1.3.6.1.4.1.1466.115.121.1.18
DSA Quality Syntax Y 1.3.6.1.4.1.1466.115.121.1.19
DSE Type Y 1.3.6.1.4.1.1466.115.121.1.20
Enhanced Guide Y 1.3.6.1.4.1.1466.115.121.1.21
Facsimile Telephone Number Y 1.3.6.1.4.1.1466.115.121.1.22
Fax N 1.3.6.1.4.1.1466.115.121.1.23
Generalized Time Y 1.3.6.1.4.1.1466.115.121.1.24
Guide Y 1.3.6.1.4.1.1466.115.121.1.25
IA5 String Y 1.3.6.1.4.1.1466.115.121.1.26
INTEGER Y 1.3.6.1.4.1.1466.115.121.1.27
JPEG N 1.3.6.1.4.1.1466.115.121.1.28
LDAP Syntax Description Y 1.3.6.1.4.1.1466.115.121.1.54
Master And Shadow Access Points Y 1.3.6.1.4.1.1466.115.121.1.29
Matching Rule Description Y 1.3.6.1.4.1.1466.115.121.1.30
Matching Rule Use Description Y 1.3.6.1.4.1.1466.115.121.1.31
Mail Preference Y 1.3.6.1.4.1.1466.115.121.1.32
MHS OR Address Y 1.3.6.1.4.1.1466.115.121.1.33
Name And Optional UID Y 1.3.6.1.4.1.1466.115.121.1.34
Name Form Description Y 1.3.6.1.4.1.1466.115.121.1.35
Numeric String Y 1.3.6.1.4.1.1466.115.121.1.36
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 6
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
Object Class Description Y 1.3.6.1.4.1.1466.115.121.1.37
OID Y 1.3.6.1.4.1.1466.115.121.1.38
Other Mailbox Y 1.3.6.1.4.1.1466.115.121.1.39
Password Y 1.3.6.1.4.1.1466.115.121.1.40
Postal Address Y 1.3.6.1.4.1.1466.115.121.1.41
Protocol Information Y 1.3.6.1.4.1.1466.115.121.1.42
Presentation Address Y 1.3.6.1.4.1.1466.115.121.1.43
Printable String Y 1.3.6.1.4.1.1466.115.121.1.44
Subtree Specification Y 1.3.6.1.4.1.1466.115.121.1.45
Supplier Information Y 1.3.6.1.4.1.1466.115.121.1.46
Supplier Or Consumer Y 1.3.6.1.4.1.1466.115.121.1.47
Supplier And Consumer Y 1.3.6.1.4.1.1466.115.121.1.48
Supported Algorithm N 1.3.6.1.4.1.1466.115.121.1.49
Telephone Number Y 1.3.6.1.4.1.1466.115.121.1.50
Teletex Terminal Identifier Y 1.3.6.1.4.1.1466.115.121.1.51
Telex Number Y 1.3.6.1.4.1.1466.115.121.1.52
UTC Time Y 1.3.6.1.4.1.1466.115.121.1.53
A suggested minimum upper bound on the number of characters in value
with a DirectoryString or
IA5String syntax string-based syntax, or the number of bytes in a value for all
other syntaxes syntaxes, may be indicated by appending this bound count inside
of curly braces. braces following the syntax name's OBJECT IDENTIFIER. This
bound is not part of the syntax name itself. For instance, "DirectoryString{64}"
"1.3.6.4.1.1466.0{64}" suggests that server implementations should
allow the string to be 64 characters long, althoough although they may allow
longer strings. Note that a single character of the DirectoryString Directory String
syntax may be encoded in more than one byte since UTF-8 is a
variable-length encoding.
4.2.3. Syntax names do not have global scope: two clients or servers Description
The following BNF may
know of different syntaxes be used to associate a short description with the same name.
The definition
a syntax OBJECT IDENTIFIER. Implementors should note that future
versions of this document may expand this definition to include
additional arbitrary syntaxes terms.
SyntaxDescription = "(" whsp
numericoid whsp
[ "DESC" qdstring ]
whsp ")"
4.3. Object Classes
The format for representation of object classes is strongly depreciated
since it defined in X.501
[3]. In general every entry will hinder interoperability: today's client contain an abstract class ("top" or
"alias"), at least one structural object class, and server
implementations generally do not have zero or more
auxiliary object classes. Whether an object class is abstract,
structural or auxiliary is defined when the ability to dynamically recognize
new syntaxes. In most cases attributes will object class identifier
is assigned. An object class definition should not be defined with the
DirectoryString syntax.
Wahl, Coulbeck, Howes, Kille Page 4
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
4.3. Object Classes changed
without having a new identifier assigned to it.
Object class descriptions are written according to the following BNF:
<ObjectClassDescription> ::= BNF.
Implementors should note that future versions of this document may
expand this definition to include additional terms.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 7
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
ObjectClassDescription = "("
<oid> -- whsp
numericoid whsp ; ObjectClass identifier
[ "NAME" <DirectoryStrings> qdescrs ]
[ "DESC" <DirectoryString> qdstring ]
[ "OBSOLETE" whsp ]
[ "SUP" <oids> oids ] -- ; Superior ObjectClasses
[ ( "ABSTRACT" | / "STRUCTURAL" | / "AUXILIARY" ) whsp ] --
; default structural
[ "MUST" <oids> oids ] -- ; AttributeTypes
[ "MAY" <oids> oids ] -- ; AttributeTypes
whsp ")"
These are described as sample values for the subschema
"objectClasses" attribute for a server which implements the LDAP
schema. While lines have been folded for readability, the values
transferred in protocol would not contain newlines.
Servers SHOULD implement all the object classes referenced in
section 7, except for extensibleObject, which is optional.
Servers MAY implement additional object classes not listed in this
document, and if they do so, SHOULD publish the definitions of the
classes in the objectClasses attribute of their subschema subentries. entries.
Later documents may define additional object classes.
4.4. Matching Rules
Matching rules are used by servers to compare attribute values
against assertion values when performing Search and Compare
operations. They are also used to identify the value to be added
or deleted when modifying entries, and are used when comparing a
purported distinguished name with the name of an entry.
Most of the attributes given in this document will have an equality
matching rule defined.
Matching rule descriptions are written according to the following BNF:
<MatchingRuleDescription> ::=
BNF. Implementors should note that future versions of this document
may have expanded this BNF to include additional terms.
MatchingRuleDescription = "("
<oid> -- whsp
numericoid whsp ; MatchingRule identifier
[ "NAME" <DirectoryStrings> qdescrs ]
[ "DESC" <DirectoryString> qdstring ]
[ "OBSOLETE" whsp ]
"SYNTAX" <DirectoryString> numericoid
whsp ")"
Values of the matchingRuleUse list the attributes which are suitable
for use with an extensible matching rule.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 8
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
MatchingRuleUseDescription = "(" whsp
numericoid whsp ; MatchingRule identifier
[ "NAME" qdescrs ]
[ "DESC" qdstring ]
[ "OBSOLETE" ]
"APPLIES" oids ; AttributeType identifiers
whsp ")"
Servers which support matching rules and the extensibleMatch SHOULD
implement all the matching rules in section 8.
Servers MAY implement additional matching rules not listed in this
document, and if they do so, SHOULD publish the definitions of the
matching rules in the matchingRules attribute of their
subschema subentries.
Wahl, Coulbeck, Howes, Kille Page 5
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997 entries. If the server supports the extensibleMatch, then
the server SHOULD publish the relationship between the matching rules
and attributes in the matchingRuleUse attribute.
For example, a server which implements a privately-defined matching
rule for performing sound-alike matches on Directory String-valued
attributes would include the following in the subschema entry
(1.2.3.4.5 is an example, the OID of an actual matching rule would be
different):
matchingRule: ( 1.2.3.4.5 NAME 'soundAlikeMatch'
SYNTAX '1.3.6.1.4.1.1466.115.121.1.15' )
If this matching rule could be used with the attributes 2.5.4.41 and
2.5.4.15, the following would also be present:
matchingRuleUse: ( 1.2.3.4.5 APPLIES (2.5.4.41 $ 2.5.4.15) )
A client could then make use of this matching rule by sending a
search operation in which the filter is of the extensibleMatch choice,
the matchingRule field is "soundAlikeMatch", and the type field is
"2.5.4.41" of "2.5.4.15".
5. Attribute Types
All LDAP server implementations MUST recognize the attribute types
defined in this section. These types are based on definitions in
X.501(93) [3].
Servers SHOULD also recognize all the attributes from section 5 of [12],
from section 5 of [13].
[12].
5.1. Standard Operational Attributes
Servers MUST maintain values of these attributes in accordance with
the definitions in X.501(93).
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 9
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
5.1.1. createTimestamp
This attribute SHOULD appear in entries which were created using
the Add operation.
( 2.5.18.1 NAME 'createTimestamp' EQUALITY generalizedTimeMatch
ORDERING generalizedTimeOrderingMatch
SYNTAX 'GeneralizedTime' '1.3.6.1.4.1.1466.115.121.1.24'
SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )
5.1.2. modifyTimestamp
This attribute SHOULD appear in entries which have been modified
using the Modify operation.
( 2.5.18.2 NAME 'modifyTimestamp' EQUALITY generalizedTimeMatch
ORDERING generalizedTimeOrderingMatch
SYNTAX 'GeneralizedTime' '1.3.6.1.4.1.1466.115.121.1.24'
SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )
5.1.3. creatorsName
This attribute SHOULD appear in entries which were created using
the Add operation.
( 2.5.18.3 NAME 'creatorsName' EQUALITY distinguishedNameMatch
SYNTAX 'DN' '1.3.6.1.4.1.1466.115.121.1.12'
SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )
5.1.4. modifiersName
This attribute SHOULD appear in entries which have been modified
using the Modify operation.
( 2.5.18.4 NAME 'modifiersName' EQUALITY distinguishedNameMatch
SYNTAX 'DN' '1.3.6.1.4.1.1466.115.121.1.12'
SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )
5.1.5. subschemaSubentry
The value of this attribute is the name of a subschema subentry, an entry (or
subentry if the server is based on X.500(93)) in which the server
makes available attributes specifying the schema.
( 2.5.18.10 NAME 'subschemaSubentry'
EQUALITY distinguishedNameMatch
SYNTAX 'DN' '1.3.6.1.4.1.1466.115.121.1.12' NO-USER-MODIFICATION
SINGLE-VALUE USAGE directoryOperation )
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 10
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
5.1.6. attributeTypes
This attribute is typically located in the subschema entry.
( 2.5.21.5 NAME 'attributeTypes'
EQUALITY objectIdentifierFirstComponentMatch
SYNTAX 'AttributeTypeDescription' '1.3.6.1.4.1.1466.115.121.1.3' USAGE directoryOperation )
5.1.7. objectClasses
This attribute is typically located in the subschema entry.
( 2.5.21.6 NAME 'objectClasses'
EQUALITY objectIdentifierFirstComponentMatch
SYNTAX 'ObjectClassDescription' '1.3.6.1.4.1.1466.115.121.1.37' USAGE directoryOperation )
5.1.8. matchingRules
This attribute is typically located in the subschema entry.
( 2.5.21.4 NAME 'matchingRules'
EQUALITY objectIdentifierFirstComponentMatch
SYNTAX '1.3.6.1.4.1.1466.115.121.1.30' USAGE directoryOperation )
5.1.9. matchingRuleUse
This attribute is typically located in the subschema entry.
( 2.5.21.8 NAME 'matchingRuleUse'
EQUALITY objectIdentifierFirstComponentMatch
SYNTAX '1.3.6.1.4.1.1466.115.121.1.31' USAGE directoryOperation )
Wahl, Coulbeck, Howes, Kille Page 6
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
5.2. LDAP Operational Attributes
These attributes are only present in the root DSE. DSE (see [1] and [3]).
Servers MUST recognize these attribute names, but it is not required
that a server provide values for these attributes, when the
attribute corresponds to a feature which the server does not
implement.
5.2.1. namingContexts
The values of this attribute correspond to naming contexts which this
server masters or shadows. If the server does not master any
information (e.g. it is an LDAP gateway to a public X.500 directory)
this attribute will be absent. If the server believes it contains
the entire directory, the attribute will have a single value, and
that value will be the empty string (indicating the null DN of the
root). This attribute will allow a client to choose suitable base
objects for searching when it has contacted a server.
( 1.3.6.1.4.1.1466.101.120.5 NAME 'namingContexts'
SYNTAX 'DN' '1.3.6.1.4.1.1466.115.121.1.12' USAGE dSAOperation )
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 11
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
5.2.2. altServer
The values of this attribute are URLs of other servers which may be
contacted when this server becomes unavailable. If the server does
not know of any other servers which could be used this attribute
will be absent. Clients may cache this information in case their
preferred LDAP server later becomes unavailable.
( 1.3.6.1.4.1.1466.101.120.6 NAME 'altServer'
SYNTAX 'IA5String' '1.3.6.1.4.1.1466.115.121.1.26' USAGE dSAOperation )
5.2.3. supportedExtension
The values of this attribute are OBJECT IDENTIFIERs identifying the
supported extended operations which the server supports.
If the server does not support any extensions this attribute will be
absent.
( 1.3.6.1.4.1.1466.101.120.7 NAME 'supportedExtension'
SYNTAX 'OID' '1.3.6.1.4.1.1466.115.121.1.38' USAGE dSAOperation )
5.2.4. supportedControl
The values of this attribute are the OBJECT IDENTIFIERS identifying
controls which the server supports. If the server does not
support any controls, this attribute will be absent.
( 1.3.6.1.4.1.1466.101.120.13 NAME 'supportedControl'
SYNTAX 'OID' '1.3.6.1.4.1.1466.115.121.1.38' USAGE dSAOperation )
Wahl, Coulbeck, Howes, Kille Page 7
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
5.2.5. supportedSASLMechanisms
The values of this attribute are the names of supported SASL
mechanisms which the server supports. If the server does not
support any mechanisms this attribute will be absent.
( 1.3.6.1.4.1.1466.101.120.14 NAME 'supportedSASLMechanisms'
SYNTAX 'LDAPString' '1.3.6.1.4.1.1466.115.121.1.15' USAGE dSAOperation )
5.2.6. supportedLDAPVersion
The values of this attribute are the versions of the LDAP protocol
which the server implements.
( 1.3.6.1.4.1.1466.101.120.15 NAME 'supportedLDAPVersion'
SYNTAX 'INTEGER' '1.3.6.1.4.1.1466.115.121.1.27' USAGE dSAOperation )
5.3. LDAP Subschema Attribute
This attribute is typically located in the subschema entry.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 12
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
5.3.1. ldapSyntaxes
Servers MAY use this attribute to list the syntaxes which are
implemented. Each value corresponds to one syntax.
( 1.3.6.1.4.1.1466.101.120.16 NAME 'ldapSyntaxes'
EQUALITY objectIdentifierFirstComponentMatch
SYNTAX '1.3.6.1.4.1.1466.115.121.1.54' USAGE directoryOperation )
6. Syntaxes
Servers SHOULD recognize all the syntaxes described in this section
(6.1 - 6.3). section.
Each syntax begins with a sample value of the ldapSyntaxes attribute
which defines the OBJECT IDENTIFIER of the syntax. The descriptions
of syntax names are not carried in protocol, and are not guaranteed
to be unique.
6.1. AttributeTypeDescription Attribute Type Description
( 1.3.6.1.4.1.1466.115.121.1.3 DESC 'Attribute Type Description' )
Values with in this syntax are encoded according to the BNF given at the
start of section 4.1. 4.2. For example,
( 2.5.4.0 NAME 'objectClass'
SYNTAX 'OID' '1.3.6.1.4.1.1466.115.121.1.38' )
6.2. Audio
The encoding of a value with Audio Binary
( 1.3.6.1.4.1.1466.115.121.1.5 DESC 'Binary' )
Values in this syntax is the octets of the value
itself, an 8KHz uncompressed encoding compatible with the SunOS
4.1.3 'play' utility. are encoded as described in section 4.2.1.
6.3. BitString
The encoding of a value with BitString Bit String
( 1.3.6.1.4.1.1466.115.121.1.6 DESC 'Bit String' )
Values in this syntax is are encoded according to the following BNF:
<bitstring> ::= ''' <binary-digits> ''B'
<binary-digits> ::= '0' <binary-digits> | '1' <binary-digits> |
empty
bitstring = "'" *binary-digit "'B"
binary-digit = "0" / "1"
Example:
'0101111101'B
Wahl, Coulbeck, Howes, Kille Page 8
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
6.4. Boolean
( 1.3.6.1.4.1.1466.115.121.1.7 DESC 'Boolean' )
Values with Boolean in this syntax are encoded according to the following BNF:
<boolean> ::=
boolean = "TRUE" | / "FALSE"
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 13
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
Boolean values have an encoding of "TRUE" if they are logically true,
and have an encoding of "FALSE" otherwise.
6.5. Certificate
( 1.3.6.1.4.1.1466.115.121.1.8 DESC 'Certificate' )
Because of the changes from X.509(1988) and X.509(1993) and
additional changes to the ASN.1 definition to support certificate
extensions, no string representation is defined, and values with Certificate in
this syntax MUST only be transferred using the binary encoding, by
requesting or returning the attributes with descriptions
"userCertificate;binary" or "caCertificate;binary". The BNF notation
in RFC 1778 for "User Certificate" is not recommended to be used.
6.6. CertificateList Certificate List
( 1.3.6.1.4.1.1466.115.121.1.9 DESC 'Certificate List' )
Because of the incompatibility of the X.509(1988) and X.509(1993)
definitions of revocation lists, values with CertificateList in this syntax MUST only be
transferred using a binary encoding, by requesting or returning the
attributes with descriptions "certificateRevocationList;binary" or
"authorityRevocationList;binary". The BNF notation in RFC 1778 for
"Authority Revocation List" is not recommended to be used.
6.7. CertificatePair Certificate Pair
( 1.3.6.1.4.1.1466.115.121.1.10 DESC 'Certificate Pair' )
Because the Certificate is being carried in binary, values with
CertificatePair in this
syntax MUST only be transferred using a binary encoding, by requesting
or returning the attribute description "crossCertificatePair;binary".
The BNF notation in RFC 1778 for "Certificate Pair" is not
recommended to be used.
6.8. CountryString Country String
( 1.3.6.1.4.1.1466.115.121.1.11 DESC 'Country String' )
A value of CountryString in this syntax is encoded the same as a value of
DirectoryString
Directory String syntax. Note that this syntax is limited to values
of exactly two printable string characters.
<CountryString> ::= <p> <p>
CountryString = p p
Example:
US
Wahl, Coulbeck, Howes, Kille Page 9
INTERNET-DRAFT
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Definitions March Defns. Page 14
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
6.9. DN
( 1.3.6.1.4.1.1466.115.121.1.12 DESC 'DN' )
Values with DN (Distinguished Name) in the Distinguished Name syntax are encoded to have the
representation defined in [5]. Note that this representation is not
reversible to an ASN.1 encoding used in X.500 for Distinguished
Names, as the CHOICE of any DirectoryString element in an RDN is no
longer known.
Examples (from [5]):
CN=Steve Kille,O=Isode Limited,C=GB
OU=Sales+CN=J. Smith,O=Widget Inc.,C=US
CN=L. Eagle,O=Sue\, Grabbit and Runn,C=GB
CN=Before\0DAfter,O=Test,C=GB
1.3.6.1.4.1.1466.0=#04024869,O=Test,C=GB
SN=Lu\C4\8Di\C4\C7
SN=Lu\C4\8Di\C4\87
6.10. DirectoryString Directory String
( 1.3.6.1.4.1.1466.115.121.1.15 DESC 'Directory String' )
A string with DirectoryString in this syntax is encoded in the UTF-8 form of ISO 10646
(a superset of Unicode). Servers and clients MUST be prepared to
receive encodings of arbitrary Unicode characters, including
characters not presently assigned to any character set, in values. set.
For characters in the PrintableString form, the value is encoded as
the string value itself.
If it is of the TeletexString form, then the characters are
transliterated to their equivalents in UniversalString, and encoded
in UTF-8 [9].
If it is of the UniversalString or BMPString forms [10], UTF-8 is
used to encode them.
Note: the form of DirectoryString is not indicated in protocol
unless the attribute value is carried in binary. Servers which
convert to DAP MUST choose an appropriate form. Servers MUST NOT
reject values merely because they contain legal Unicode characters
outside of the range of printable ASCII.
Example:
This is a string of DirectoryString containing #!%#@
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 15
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
6.11. DITContentRuleDescription DIT Content Rule Description
( 1.3.6.1.4.1.1466.115.121.1.16 DESC 'DIT Content Rule Description' )
Values with in this syntax are encoded according to the following BNF:
<DITContentRuleDescription> ::= BNF.
Implementors should note that future versions of this document
may have expanded this BNF to include additional terms.
DITContentRuleDescription = "("
<oid> --
numericoid ; Structural ObjectClass identifier
[ "NAME" <DirectoryStrings> qdescrs ]
[ "DESC" <DirectoryString> qdstring ]
[ "OBSOLETE" ]
[ "AUX" <oids> oids ] -- ; Auxiliary ObjectClasses
[ "MUST" <oids> oids ] -- ; AttributeType identifiers
[ "MAY" <oids> oids ] -- ; AttributeType identifiers
[ "NOT" <oids> oids ] -- ; AttributeType identifiers
")"
Wahl, Coulbeck, Howes, Kille Page 10
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
6.12. FacsimileTelephoneNumber Facsimile Telephone Number
( 1.3.6.1.4.1.1466.115.121.1.22 DESC 'Facsimile Telephone Number' )
Values with the FacsimileTelephoneNumber in this syntax are encoded according to the following BNF:
<fax-number> ::= <printablestring>
fax-number = printablestring [ '$' <faxparameters> "$" faxparameters ]
<faxparameters> ::= <faxparm> | <faxparm> '$' <faxparameters>
<faxparm> ::= 'twoDimensional' | 'fineResolution' | 'unlimitedLength' |
'b4Length' | 'a3Width' | 'b4Width' | 'uncompressed'
faxparameters = faxparm / ( faxparm "$" faxparameters )
faxparm = "twoDimensional" / "fineResolution" /
"unlimitedLength" /
"b4Length" / "a3Width" / "b4Width" / "uncompressed"
In the above, the first <printablestring> printablestring is the actual fax number,
and the <faxparm> faxparm tokens represent fax parameters.
6.13. Fax
( 1.3.6.1.4.1.1466.115.121.1.23 DESC 'Fax' )
Values with Fax in this syntax are encoded as if they were octet strings
containing Group 3 Fax images as defined in [7].
6.14. GeneralizedTime Generalized Time
( 1.3.6.1.4.1.1466.115.121.1.24 DESC 'Generalized Time' )
Values of in this syntax are encoded as printable strings, represented
as specified in X.208. Note that the time zone must be specified.
It is strongly recommended that Zulu GMT time zone be used. For example,
199412161032Z
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 16
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
6.15. IA5String IA5 String
( 1.3.6.1.4.1.1466.115.121.1.26 DESC 'IA5 String' )
The encoding of a value with IA5String in this syntax is the string value itself.
6.16. INTEGER
( 1.3.6.1.4.1.1466.115.121.1.27 DESC 'INTEGER' )
Values with INTEGER in this syntax are encoded as the decimal representation
of their values, with each decimal digit represented by the its
character equivalent. So the number 1321 is represented by the
character string "1321".
6.17. JPEG
( 1.3.6.1.4.1.1466.115.121.1.28 DESC 'JPEG' )
Values with JPEG in this syntax are encoded as if they were octet strings containing JPEG images in
the JPEG File Interchange Format (JFIF), as described in [8].
Wahl, Coulbeck, Howes, Kille Page 11
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
6.18. MatchingRuleUseDescription Matching Rule Description
( 1.3.6.1.4.1.1466.115.121.1.30 DESC 'Matching Rule Description' )
Values of this syntax type matchingRules are encoded as strings according to
the following BNF:
<MatchingRuleUseDescription> ::= "("
<oid> -- MatchingRule identifier
[ "NAME" <DirectoryStrings> ]
[ "DESC" <DirectoryString> ]
[ "OBSOLETE" ]
"APPLIES" <oids> -- AttributeType identifiers
")" BNF given in section 4.4.
6.19. MHSORAddress Matching Rule Use Description
( 1.3.6.1.4.1.1466.115.121.1.31 DESC 'Matching Rule Use Description' )
Values of type matchingRuleUse are encoded as strings according to
the BNF given in section 4.4.
6.20. MHS OR Address
( 1.3.6.1.4.1.1466.115.121.1.33 DESC 'MHS OR Address' )
Values of type MHSORAddress in this syntax are encoded as strings, according to the format
defined in [11].
6.20. NameAndOptionalUID
The encoding of a value with the NameAndOptionalUID
6.21. Name And Optional UID
( 1.3.6.1.4.1.1466.115.121.1.34 DESC 'Name And Optional UID' )
Values in this syntax is are encoded according to the following BNF:
<NameAndOptionalUID> ::=
<DistinguishedName>
NameAndOptionalUID = DistinguishedName [ '#' <bitstring> "#" bitstring ]
Although the '#' character may occur in a string representation of a
distinguished name, no additional special quoting is done.
This syntax has been added subsequent to RFC 1778.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 17
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
Example:
1.3.6.1.4.1.1466.0=#04024869,O=Test,C=GB#'0101'B
6.21. NameFormDescription
6.22. Name Form Description
( 1.3.6.1.4.1.1466.115.121.1.35 DESC 'Name Form Description' )
Values of in this syntax are encoded according to the following BNF:
<NameFormDescription> ::= BNF.
Implementors should note that future versions of this document
may have expanded this BNF to include additional terms.
NameFormDescription = "("
<oid> -- whsp
numericoid whsp ; NameForm identifier
[ "NAME" <DirectoryStrings> qdescrs ]
[ "DESC" <DirectoryString> qdstring ]
[ "OBSOLETE" whsp ]
"OC" <oid> -- woid ; Structural ObjectClass
"MUST" <oids> -- oids ; AttributeTypes
[ "MAY" <oids> oids ] -- ; AttributeTypes
whsp ")"
Wahl, Coulbeck, Howes, Kille Page 12
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
6.22. NumericString
6.23. Numeric String
( 1.3.6.1.4.1.1466.115.121.1.36 DESC 'Numeric String' )
The encoding of a string with the NumericString in this syntax is the string value itself.
Example:
1997
6.23. ObjectClassDescription
6.24. Object Class Description
( 1.3.6.1.4.1.1466.115.121.1.37 DESC 'Object Class Description' )
Values of in this syntax are encoded according to the BNF in section 4.3.
6.24.
6.25. OID
( 1.3.6.1.4.1.1466.115.121.1.38 DESC 'OID' )
Values with OID (Object Identifier) in the Object Identifier syntax are encoded according to
the
following BNF:
<oid> ::= <descr> | <numericoid>
<descr> ::= <keystring>
<numericoid> ::= <numericstring> | <numericstring> '.' <numericoid>
In the above BNF, <descr> is the syntactic representation of an
object descriptor, which consists of letters and digits, starting
with a letter. When encoding values with OID syntax, the first encoding
option MUST be used in preference to the second. That is, in encoding
object identifiers, object descriptors (where assigned and known by
the implementation) must be used BNF in preference to numeric oids to
the greatest extent possible. All permitted object descriptors section 4.1 for use
in LDAP are given in this document. No other object descriptors may be
used. (Note that clients should expect that LDAPv2 implementations
will return object descriptors other than those listed.) "oid".
Example:
1.2.3.4
cn
6.25. OtherMailbox
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 18
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
6.26. Other Mailbox
( 1.3.6.1.4.1.1466.115.121.1.39 DESC 'Other Mailbox' )
Values of the OtherMailbox in this syntax are encoded according to the following BNF:
<otherMailbox> ::= <mailbox-type> '$' <mailbox>
<mailbox-type> ::= an encoded Printable String
<mailbox> ::= an
otherMailbox = mailbox-type "$" mailbox
mailbox-type = printablestring
mailbox = <an encoded IA5 String String>
In the above, <mailbox-type> mailbox-type represents the type of mail system in
which the mailbox resides, for example "MCIMail"; and <mailbox> mailbox is
the actual mailbox in the mail system defined by <mailbox-type>.
Wahl, Coulbeck, Howes, Kille Page 13
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
6.26. Password
Values with Password syntax are encoded as octet strings.
Example:
secret mailbox-type.
6.27. PostalAddress Postal Address
( 1.3.6.1.4.1.1466.115.121.1.41 DESC 'Postal Address' )
Values with the PostalAddress in this syntax are encoded according to the following BNF:
<postal-address> ::= <dstring> | <dstring> '$' <postal-address>
postal-address = dstring *( "$" dstring )
In the above, each <dstring> dstring component of a postal address value is
encoded as a value of type DirectoryString Directory String syntax. Backslashes and
dollar characters, if they occur in the component, are quoted as
described in section 4.2.
Example:
1234 Main St.$Anytown, CA 12345$USA
\241,000,000 Sweepstakes$PO Box 1000000$Anytown, CA 12345$USA
6.28. PresentationAddress Presentation Address
( 1.3.6.1.4.1.1466.115.121.1.43 DESC 'Presentation Address' )
Values with the PresentationAddress in this syntax are encoded to have with the representation described
in RFC 1278 [6].
6.29. PrintableString Printable String
( 1.3.6.1.4.1.1466.115.121.1.44 DESC 'Printable String' )
The encoding of a value with PrintableString in this syntax is the string value itself.
PrintableString is limited to the characters in production <p> p of
section 4.1.
Example:
This is a PrintableString
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 19
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
6.30. TelephoneNumber Telephone Number
( 1.3.6.1.4.1.1466.115.121.1.50 DESC 'Telephone Number' )
Values with the TelephoneNumber in this syntax are encoded as if they were Printable String
types. Telephone numbers are recommended in X.520 to be in
international form.
Example:
+1 512 305 0280
6.31. UTCTime UTC Time
( 1.3.6.1.4.1.1466.115.121.1.53 DESC 'UTC Time' )
Values with UTCTime in this syntax are encoded as if they were printable
strings with the strings containing a UTCTime value. This is
historical; new attribute definitions will SHOULD use GeneralizedTime
instead.
Wahl, Coulbeck, Howes, Kille Page 14
INTERNET-DRAFT LDAPv3 Attribute
6.32. LDAP Syntax Definitions March 1997 Description
( 1.3.6.1.4.1.1466.115.121.1.54 DESC 'LDAP Syntax Description' )
Values in this syntax are encoded according to the BNF in section
4.2.3.
7. Object Classes
Servers SHOULD recognize all the names of standard classes from
section 7 of [12], as well as the names of the Internet classes from section
7 of [13]. [12].
7.1. Extensible Object Class
The extensibleObject object class, if present in an entry, permits
that entry to optionally hold any attribute. The MAY attribute list
of this class is implicitly the set of all attributes known to the server. attributes.
( 1.3.6.1.4.1.1466.101.120.111 NAME 'extensibleObject'
SUP top AUXILIARY )
The mandatory attributes of the other object classes of this entry
are still required to be present.
Note that not all servers will implement this object class, and those
which do not will reject requests to add entries which contain this
object class, or modify an entry to add this object class.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 20
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
8. Matching Rules
Servers which implement the extensibleMatch filter SHOULD recognize allow
all the following matching rules, rules listed in this section to be used for equality matching, and in the
extensibleMatch. In general these servers SHOULD allow matching
rules to be used with all attribute types known to the server, when
the assertion syntax of the matching rule is the same as the value
syntax of the attribute.
Servers MAY implement additional matching rules.
8.1. Matching Rules used in Equality Filters
Servers SHOULD be capable of performing the following matching rules.
For all these rules, the assertion syntax is the same as the value
syntax.
( 2.5.13.0 NAME 'objectIdentifierMatch'
SYNTAX 'OID' '1.3.6.1.4.1.1466.115.121.1.38' )
( 2.5.13.1 NAME 'distinguishedNameMatch'
SYNTAX 'DN' '1.3.6.1.4.1.1466.115.121.1.12' )
( 2.5.13.2 NAME 'caseIgnoreMatch'
SYNTAX 'DirectoryString' '1.3.6.1.4.1.1466.115.121.1.15' )
( 2.5.13.8 NAME 'numericStringMatch'
SYNTAX 'NumericString' '1.3.6.1.4.1.1466.115.121.1.36' )
( 2.5.13.11 NAME 'caseIgnoreListMatch'
SYNTAX 'PostalAddress' '1.3.6.1.4.1.1466.115.121.1.41' )
( 2.5.13.14 NAME 'integerMatch'
SYNTAX 'INTEGER' '1.3.6.1.4.1.1466.115.121.1.27' )
( 2.5.13.16 NAME 'bitStringMatch'
SYNTAX 'BitString' )
( 2.5.13.17 NAME 'octetStringMatch' SYNTAX 'Password' '1.3.6.1.4.1.1466.115.121.1.6' )
( 2.5.13.20 NAME 'telephoneNumberMatch'
SYNTAX 'TelephoneNumber' '1.3.6.1.4.1.1466.115.121.1.50' )
( 2.5.13.22 NAME 'presentationAddressMatch'
SYNTAX 'PresentationAddress' '1.3.6.1.4.1.1466.115.121.1.43' )
( 2.5.13.23 NAME 'uniqueMemberMatch'
SYNTAX 'NameAndOptionalUID' '1.3.6.1.4.1.1466.115.121.1.34' )
( 2.5.13.24 NAME 'protocolInformationMatch'
SYNTAX 'ProtocolInformation' '1.3.6.1.4.1.1466.115.121.1.42' )
( 2.5.13.27 NAME 'generalizedTimeMatch'
SYNTAX 'GeneralizedTime' '1.3.6.1.4.1.1466.115.121.1.24' )
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 21
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
( 1.3.6.1.4.1.1466.109.114.1 NAME 'caseExactIA5Match'
SYNTAX 'IA5String' '1.3.6.1.4.1.1466.115.121.1.26' )
( 1.3.6.1.4.1.1466.109.114.2 NAME 'caseIgnoreIA5Match'
SYNTAX '1.3.6.1.4.1.1466.115.121.1.26' )
When performing the caseIgnoreMatch, caseIgnoreListMatch,
telephoneNumberMatch, caseExactIA5Match and caseIgnoreIA5Match,
multiple adjoining whitespace characters are treated the same as an
individual space, and leading and trailing whitespace is ignored.
8.2. Matching Rules used in Inequality Filters
Servers SHOULD be capable of performing the following matching rules,
which are used in greaterOrEqual and lessOrEqual filters.
( 2.5.13.28 NAME 'generalizedTimeOrderingMatch'
SYNTAX '1.3.6.1.4.1.1466.115.121.1.24' )
( 2.5.13.3 NAME 'caseIgnoreOrderingMatch'
SYNTAX '1.3.6.1.4.1.1466.115.121.1.15' )
8.3. Matching Rules for Subschema Attributes
Servers which allow subschema entries to be modified by clients MUST
support the following matching rule, as it is the equality matching
rule for several of the subschema attributes.
( 1.3.6.1.4.1.1466.109.114.2 2.5.13.30 NAME 'caseIgnoreIA5Match' 'objectIdentifierFirstComponentMatch'
SYNTAX 'IA5String' '1.3.6.1.4.1.1466.115.121.1.38' )
When performing the caseIgnoreMatch, caseIgnoreListMatch,
telephoneNumberMatch, caseExactIA5Match and caseIgnoreIA5Match,
multiple adjoining whitespace characters are treated
Implementors should note that the same as assertion syntax of this matching
rule, an
individual space, and leading and trailing whitespace OID, is ignored. different from the value syntax of attributes for
which this is the equality matching rule.
9. Security Considerations
9.1. Disclosure
Attributes of directory entries are used to provide descriptive
information about the real-world objects they represent, which can
be people, organizations or devices. Most countries have privacy
laws regarding the publication of information about people.
9.2. Use of Attribute Values in Security issues Applications
The transformations of an AttributeValue value from its X.501 form to
an LDAP string representation are not discussed in this memo.
Wahl, Coulbeck, Howes, Kille Page 15
INTERNET-DRAFT always reversible back to the
same BER or DER form. An example of a situation which requires the
DER form of a distinguished name is the verification of an X.509
certificate.
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Definitions March Defns. Page 22
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
For example, a distinguished name consisting of one RDN with one AVA,
in which the type is commonName and the value is of the TeletexString
choice with the letters 'Sam' would be represented in LDAP as the
string CN=Sam. Another distinguished name in which the value is
still 'Sam' but of the PrintableString choice would have the same
representation CN=Sam.
Applications which require the reconstruction of the DER form of the
value SHOULD NOT use the string representation of attribute syntaxes
when converting a value to LDAP format. Instead it SHOULD use the
Binary syntax.
10. Acknowledgements
This document is based substantially on RFC 1778, written by Tim
Howes, Steve Kille, Wengyik Yeong and Colin Robbins.
Many of the attribute syntax encodings defined in this document and
related documents are adapted from those used in the QUIPU and the
IC R3 X.500 implementations. The contributions of the authors of both
these implementations in the specification of syntaxes in this document are gratefully
acknowledged.
11. Authors Addresses
Mark Wahl
Critical Angle Inc.
4815 West Braker Lane #502-385
Austin, TX 78759
USA
EMail: M.Wahl@critical-angle.com
Andy Coulbeck
Isode Limited
The Dome, The Square
Richmond TW9 1DT
United Kingdom
Phone: +44 181-332-9091
EMail: A.Coulbeck@isode.com
Tim Howes
Netscape Communications Corp.
501 E. Middlefield Rd
Mountain View, CA 94043
USA
Phone: +1 415 254-1900
EMail: howes@netscape.com
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 23
INTERNET-DRAFT draft-ietf-asid-ldapv3-attributes-05.txt June 1997
Steve Kille
Isode Limited
The Dome, The Square
Richmond
TW9 1DT
UK
Phone: +44-181-332-9091
EMail: S.Kille@isode.com
Wahl, Coulbeck, Howes, Kille Page 16
INTERNET-DRAFT LDAPv3 Attribute Syntax Definitions March 1997
12. Bibliography
[1] M. Wahl, T. Howes, S. Kille, "Lightweight Directory Access
Protocol (Version 3)", INTERNET-DRAFT <draft-ietf-asid-ldapv3-protocol-04.txt>,
March
<draft-ietf-asid-ldapv3-protocol-05.txt>, June 1997.
[2] The Directory: Selected Attribute Types. ITU-T Recommendation
X.520, 1993.
[3] The Directory: Models. ITU-T Recommendation X.501, 1993.
[4] S. Bradner, "Key words for use in RFCs to Indicate Requirement
Levels", INTERNET-DRAFT <draft-bradner-key-words-03.txt>. RFC 2119.
[5] M. Wahl, S. Kille, "A UTF-8 String Representation of
Distinguished Names", INTERNET-DRAFT <draft-ietf-asid-ldapv3-dn-02.txt>,
March
<draft-ietf-asid-ldapv3-dn-03.txt>, April 1997.
[6] S. Kille, "A String Representation for Presentation Addresses",
RFC 1278, University College London, November 1991.
[7] Terminal Equipment and Protocols for Telematic Services -
Standardization of Group 3 facsimile apparatus for document
transmission. CCITT, Recommendation T.4.
[8] JPEG File Interchange Format (Version 1.02). Eric Hamilton,
C-Cube Microsystems, Milpitas, CA, September 1, 1992.
[9] F. Yergeau, "UTF-8, a transformation format of Unicode and ISO
10646", RFC 2044, October 1996.
[10] Universal Multiple-Octet Coded Character Set (UCS) -
Architecture and Basic Multilingual Plane, ISO/IEC 10646-1 : 1993.
1993 (With amendments).
[11] H. Alvestrand, S. Kille, R. Miles, M. Rose, S. Thompson, Hardcastle-Kille, "Mapping between X.400 X.400(1988) / ISO 10021
and RFC-822 Message Bodies", RFC 1495,
August 1993. 822", RFC 1327, May 1992.
[12] M. Wahl, "X.500(93) User Schema for use with LDAP",
INTERNET-DRAFT <draft-ietf-asid-ldapv3schema-x500-00.txt>,
March <draft-ietf-asid-ldapv3schema-x500-01.txt>,
June 1997.
[13] M. Wahl, "Pilot Internet Schema for use with LDAP",
INTERNET-DRAFT <draft-ietf-asid-ldapv3schema-pilot-00.txt>,
March 1997.
<draft-ietf-asid-ldapv3-attributes-04.txt> D. Crocker, "Standard of the Format of ARPA-Internet Text
Messages", STD 11, RFC 822, August 1982.
<draft-ietf-asid-ldapv3-attributes-05.txt> Expires: September November 1997
Wahl, Coulbeck, Howes, Kille
Wahl,Coulbeck,Howes,Kille LDAPv3 Attribute Syntax Defns. Page 17 24
----