Local constraint in semistructured data schemas

From Tetherless World Wiki

\begin{bibtex} @inproceedings{DBLP:conf/sebd/CaliCL00,

 author    = {Andrea Cal\`{\i} and
              Diego Calvanese and
              Maurizio Lenzerini},
 title     = {Local constraint in semistructured data schemas},
 booktitle = {SEBD},
 year      = {2000},
 pages     = {65-78},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}