* aimChatID * based_near * birthday * family_name * firstName * gender * homepage * icqChatID * maker * mbox * msnChatID * nick * phone * yahooChatID
SIOC:
* has_container * has_creator * id * link * topic
vcard:
* ADR * BDAY * CATEGORIES * EMAIL * FN * N * NICKNAME * UID
PREFIX sioc: <http://rdfs.org/sioc/ns#>
PREFIX sioct: <http://rdfs.org/sioc/types#>
SELECT DISTINCT ?attribute
WHERE
{
?forum a sioct:AddressBook .
?forum sioc:container_of ?post .
?post ?attribute ?o
}