---+++Bookmarks Data Space 
<verbatim>
PREFIX sioc: <http://rdfs.org/sioc/ns#>
PREFIX sioct: <http://rdfs.org/sioc/types#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT DISTINCT ?fname, ?phone, ?post
WHERE 
  {
    ?forum a sioct:BookmarkFolder .
    ?forum sioc:container_of ?post.
    optional { ?post foaf:maker ?maker }.
    optional { ?maker foaf:firstName ?fname  } .
    optional { ?maker foaf:phone ?phone } .
  }
</verbatim>

---+++++Sample Data (Live Query Results)
   * Click [[http://demo.openlinksw.com/sparql?default-graph-uri=http%3A%2F%2Fdemo.openlinksw.com%2Fdataspace&should-sponge=&query=PREFIX+sioc%3A+%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Fns%23%3E%0D%0APREFIX+sioct%3A+%3Chttp%3A%2F%2Frdfs.org%2Fsioc%2Ftypes%23%3E%0D%0APREFIX+foaf%3A+%3Chttp%3A%2F%2Fxmlns.com%2Ffoaf%2F0.1%2F%3E%0D%0ASELECT+DISTINCT+%3Ffname%2C+%3Fphone%2C+%3Fpost%0D%0AWHERE+%0D%0A++%7B%0D%0A++++%3Fforum+a+sioct%3ABookmarkFolder+.%0D%0A++++%3Fforum+sioc%3Acontainer_of+%3Fpost.%0D%0A++++optional+%7B+%3Fpost+foaf%3Amaker+%3Fmaker+%7D.%0D%0A++++optional+%7B+%3Fmaker+foaf%3AfirstName+%3Ffname++%7D+.%0D%0A++++optional+%7B+%3Fmaker+foaf%3Aphone+%3Fphone+%7D+.%0D%0A++%7D&format=text%2Fhtml][Here]] for a live SPARQL Query (via SPARQL Protocol) against a collection of published bookmarks.