OIDs
   
   Ejemplo (/etc/ldap/nis.schema):
   
   attributetype ( 1.3.6.1.1.1.1.3 NAME 'homeDirectory'
     DESC 'The absolute path to the home directory'
     EQUALITY caseExactIA5Match
     SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 SINGLE-VALUE )