What is objectClass in ldif

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Skribent: linux @esaravana.com
Dato:  
Emne: What is objectClass in ldif
Hello,

What is objectClass in ldif( LDAP) file? Could anybody give me quick and
dirty explanation on that?
Any reference to easy on-line documentation is also OK.

Sundar

PS. Don't refer me to RFCs please.