RFC 1823 - The LDAP Application Program Interface
RFC 2307 - An Approach for Using LDAP as a Network Information Service
RFC 2696 - LDAP Control Extension for Simple Paged Results Manipulation
RFC 2849 - The LDAP Data Interchange Format (LDIF) - Technical Specification
RFC 2891 - LDAP Control Extension for Server Side Sorting of Search Results
RFC 3296 - Named Subordinate References in LDAP Directories

Expired but used Draft:
ldapext-ldapv3-vlv-04: LDAP Extensions for Scrolling View Browsing of Search Results

RFC 4510