\input zb-basic
\input zb-ioport
\iteman{io-port 70533673}
\itemau{Frasincar, Flavius; Houben, Geert-Jan; Vdovjak, Richard; Barna, Peter}
\itemti{RAL: an algebra for querying RDF}
\itemso{WISE, 173-181 (2002).}
\itemcc{}
\itemut{}
\itemli{http://computer.org/proceedings/wise/1766/17660173abs.htm}
\end