nAll objects/attributes in the tree must conform to LDAP v3 specifications
nPrimary objects which describe people in the HEP tree are: person,
organizationalPerson, inetOrgPerson,
organization, organizationalUnit.
nPrimary attributes which describe a person include: cn,
givenName, sn, telephoneNumber, mail, o, ou,
facsimileTelephoneNumber etc.
nCan also store binary attributes such as photographs, certificates etc.