Lots of data sources can be seen as intensional: accessing all the data in the source (in extension) is impossible or very costly, but it is possible to access the data through
Choose any social network: real-life acquaintance network [Amaral et al., 2000], Twitter follower graph [Kwak et al., 2010], scientific collaboration network [Amaral et al.,
Answering queries using views, in relational and XML settings Answering queries in the presence of limited access patterns, e.g., in the deep Web..
• Raison principale de ce succès : déléguer au SGBD tout l’aspect stockage, intégrité des données, efficacité de l’accès aux données, reprise sur panne, concurrence, pour
Create a class InvertedIndex that will be used to store an in-memory version of an inverted index (that is, for each token occurring in the collection, this token and the set of
For each of the following queries (without the quotation marks), note the number of answers given by Google: “Bonnie and Clyde”, “bonnie clyde”, “bonny and Clyde”, “Bonnie
. Implement the PageRank iterative algorithm on such a graph. Do not forget to normalize the adjacency lists so that the sum of all outgoing edges of a given node is one. 15) and
Once you follow the links for creating a pipe, you will be presented with the interface of the graphical editor: on the left, a list of all boxes that can be used inside a pipe; in