\input zb-basic
\input zb-ioport
\iteman{io-port 70127764}
\itemau{Pernelle, Nathalie; Rousset, Marie-Christine; Ventos, V\'eronique}
\itemti{Automatic construction and refinement of a class hierarchy over semi-structured data}
\itemso{Workshop on Ontology Learning (2001).}
\itemcc{}
\itemut{}
\itemli{http://SunSITE.Informatik.RWTH-Aachen.DE/Publications/CEUR-WS/Vol-38/pernelle.pdf}
\end