!!! Overview 
A value of the [{$pagename}] [LDAPSyntaxes] is a string of one or more arbitrary characters from the Universal Character Set (UCS).  

[{$pagename}] is defined in [RFC 4517] and the [OID] for [{$pagename}] is [1.3.6.1.4.1.1466.115.121.1.15] 

A  zero-length character string is not permitted. 

The LDAP-specific encoding of a value of this syntax is the UTF-8 encoding [RFC 3629] of  the character string.  Such encodings conform to the following ABNF:
{{{
      DirectoryString = 1*UTF8
}}}
The <UTF8> rule is defined in [RFC 4512].

[Example]: This is a value of Directory String containing 
{{{
#!%#@
}}}

Servers and clients MUST be prepared to receive arbitrary UCS code points, including code points outside the range of printable [ASCII|ASCII Table] and code points not presently assigned to any character.

Attribute type definitions using the Directory String syntax should not restrict the format of [{$pagename}] values, e.g., by requiring that the character string conforms to specific patterns described by ABNF.  A new syntax should be defined in such cases.

The LDAP-specific encoding of a value of this syntax is defined by the [{$pagename}] rule in [RFC 4512]. 

The [OID] for [{$pagename}] is [1.3.6.1.4.1.1466.115.121.1.15] 

!! More Information 
There might be more information for this subject on one of the following: 
[{ReferringPagesPlugin before='*' after='\n' }]