!!! Overview
[LDAP] [message] is the fundamental [Protocol Data Unit] for [LDAP Protocol Exchanges]. 


[{$pagename}] is the __container__ that is used to hold all [LDAP Requests] and [LDAP Result Codes].


[{$pagename}] are "__officially__" defined an [IANA Registry] as defined [Internet Assigned Numbers Authority (IANA) Considerations for the Lightweight Directory Access Protocol (LDAP)] by [RFC 4520].

[{$pagename}] are in an [IANA Registry] at: [LDAP Message Types|https://www.iana.org/assignments/ldap-parameters/ldap-parameters.xhtml#ldap-parameters-5|target='_blank']

And we outline them below: 

%%zebra-table
%%sortable
%%table-filter
||Name||[Code]||Owner||Reference
|[Bind Request]|0|IESG|[RFC 4513][RFC 4511]
|[Bind Response]|1|IESG|[RFC 4513][RFC 4511]
|[Unbind Request]|2|IESG|[RFC 4511]
|[search Request]|3|IESG|[RFC 4511]
|[search Result Entry]|4|IESG|[RFC 4511]
|[search Result Done]|5|IESG|[RFC 4511]
|[Modify Request]|6|IESG|[RFC 4511]
|[Modify Response]|7|IESG|[RFC 4511]
|[Add Request]|8|IESG|[RFC 4511]
|[Add Response]|9|IESG|[RFC 4511]
|[Delete Request]|10|IESG|[RFC 4511]
|[Delete Response]|11|IESG|[RFC 4511]
|[Modify DN Request]|12|IESG|[RFC 4511]
|[Modify DN Response]|13|IESG|[RFC 4511]
|[Compare Request]|14|IESG|[RFC 4511]
|[compare Response]|15|IESG|[RFC 4511]
|[Abandon Request|Abandon Request]|16|IESG|[RFC 4511]
|reserved|17-18|IESG|
|[Search Result Reference]|19|IESG|[RFC 4511]
|reserved|20-22|IESG|
|[Extended Request]|23|IESG|[RFC 4511]
|[Extended Response]|24|IESG|[RFC 4511]
|[intermediate Response]|25|IESG|[RFC 3771]
/%
/%

The elements of the [{$pagename}] include:
* The message ID is a unique identifier that is used to correlate requests and responses.  The client includes a message ID in the request and all response messages for that request will have the same message ID.
* The [{$pagename}] is the container for the actual [LDAP Message] and [LDAP Result Codes].
* An optional set of [LDAP Protocol Mechanisms] may be used to provide additional information about the way that the request should be processed, or additional information about the response from the server.

!! [{$pagename}] in [Basic Encoding Rules] Format
%%prettify 
{{{
        LDAPMessage ::= SEQUENCE {
             messageID       MessageID,
             protocolOp      CHOICE {
                  bindRequest           BindRequest,
                  bindResponse          BindResponse,
                  unbindRequest         UnbindRequest,
                  searchRequest         SearchRequest,
                  searchResEntry        SearchResultEntry,
                  searchResDone         SearchResultDone,
                  searchResRef          SearchResultReference,
                  modifyRequest         ModifyRequest,
                  modifyResponse        ModifyResponse,
                  addRequest            AddRequest,
                  addResponse           AddResponse,
                  delRequest            DelRequest,
                  delResponse           DelResponse,
                  modDNRequest          ModifyDNRequest,
                  modDNResponse         ModifyDNResponse,
                  compareRequest        CompareRequest,
                  compareResponse       CompareResponse,
                  abandonRequest        AbandonRequest,
                  extendedReq           ExtendedRequest,
                  extendedResp          ExtendedResponse,
                  ...,
                  intermediateResponse  IntermediateResponse },
             controls       [0] Controls OPTIONAL }
}}} /%



!! More Information
There might be more information for this subject on one of the following:
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