Each attribute stored in a Lightweight Directory Access Protocol LDAP directory, whose values may be transferred in the LDAP protocol, has a defined LDAPSyntaxes that constrains the structure and format of its values.

The comparison semantics for values of a LDAPSyntaxes are not part of the LDAPSyntaxes definition but are instead provided through separately defined Matching Rule.

Matching Rules specify an argument, an Assertion Value, which also has a defined LDAPSyntaxes.

Microsoft Active Directory has several LDAPSyntaxes that are NOT defined within RFC 2252 or RFC 4520[1]

LDAPSyntaxes - per RFC 4520 are defined within an IANA Registry Lightweight Directory Access Protocol (LDAP) Parameters located at: LDAP Syntaxes

Object IdentifierSyntaxOwnerReference 4530 Type DescriptionIESGRFC 4517 StringIESGRFC 4517 4517 StringIESGRFC 4517 SyntaxIESGRFC 4517 MethodIESGRFC 4517 StringIESGRFC 4517 Content Rule DescriptionIESGRFC 4517 Structure Rule DescriptionIESGRFC 4517 GuideIESGRFC 4517 Telephone NumberIESGRFC 4517 4517 TimeIESGRFC 4517 LDAPSyntaxIESGRFC 4517 StringIESGRFC 4517 4517 4517 Rule DescriptionIESGRFC 4517 Rule Use DescriptionIESGRFC 4517 And Optional UIDIESGRFC 4517 Form DescriptionIESGRFC 4517 StringIESGRFC 4517 Class DescriptionIESGRFC 4517 4517 MailboxIESGRFC 4517 StringIESGRFC 4517 AddressIESGRFC 4517 StringIESGRFC 4517 NumberIESGRFC 4517 Terminal IdentifierIESGRFC 4517 NumberIESGRFC 4517 TimeIESGRFC 4517 Syntax DescriptionIESGRFC 4517 AssertionIESGRFC 4517

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