WebContent: Efficient P2P Warehousing of Web Data

The domain ontology of the pattern defines specific concepts of the domain and their relations and notations based on the core ontologies of the pattern Figure 4.. involving

We addressed the problem of Conjunctive Query Answering for the description logic DL 4, D × by formalizing DL 4, D × -knowledge bases and DL 4, D × -conjunctive queries in terms

Under the arrival process and service time distributions described in Section 3 and the parameter values in Table 3, we have validated our simulation model by comparing the

Assume that for each edge e, on average, there are 16 potential outgN um(lbl(e)) from each node. Thus, on average, we need 4 bits to represent each edge of the query. Based on

For NDL-rewritings, we show that polynomial-size rewritings always exist for tree-shaped queries with a bounded number of leaves (and arbitrary TBoxes), and for bounded

Here we show that the problem is ExpTime -complete and, in fact, deciding whether two OWL 2 QL knowledge bases (each with its own data) give the same answers to any conjunctive query

For every query and dataset, the B+Hash Tree is in each case faster (i.e., uses fewer disk reads) than the traditional B+Tree approach. Furthermore, the difference between the number

The task of data discovery and extraction is to discover new data sources those are unknown in advance for the query processing according to the data inference configuration.. The