Yannis Ioannidis University of Athens, Hellas Someone Else’s Problems
Problems › Comprehensive information systems › Multi-modal/multi-channel access
Comprehensive Info Systems › Databases, Web, Digital Libraries, Document Systems, Archives, … › Different philosophies in information storage, access, manipulation, … › Even different “scientific” communities with limited communication among them
› Need to understand real differences › Need to develop comprehensive approaches to deal with all forms of information Comprehensive Info Systems
› Need to be able to ask for “Details of the $100K and up bank transactions of anyone mentioned in the same document as someone in the `most-wanted’ table who …” and the system to deal with information of different degrees of structure Database tables of people and transactions XML files of transaction details Text files of newspaper articles
Comprehensive Info Systems › Query languages and other interfaces › Other forms of interaction › Algebras › Query processing and optimization › Information synthesis › …
Multi-Modal/-Channel Access › Access information using different devices at different times › Within and across user sessions › Critical for mobile databases, location- based information access, …
Multi-Modal/-Channel Access › Persistent sessions across multiple devices › Session maintenance as user moves around - start from where user left off › Device-dependent interface and content & service delivery
Multi-Modal/-Channel Access › Need to be able to ask for “Seafood restaurants in Lowell, MA” and the system deliver a different response (in terms of visual abstraction level) when that is viewed from a laptop or a mobile phone be prepared to respond on-line or later
Multi-Modal/-Channel Access › “Multi-” query languages and other interfaces › “Multi-” algebras › “Multi-” processing and optimization › “Multi-” response formation › “Multi-” session management › …
Multi-Modal/-Channel Access › Intimately related to information approximation quality of service