1177 search results - page 48 / 236 » A Database of Narrative Schemas |
EDBT
2006
ACM
14 years 9 months ago
2006
ACM
A database schema should be able to evolve to reflect changes to the universe it represents. In existing systems, user transactions get blocked during complex schema transformation...
ER
2005
Springer
14 years 2 months ago
2005
Springer
We discuss the main features of a multilevel dictionary based on a metamodel approach. The application is an implementation of ModelGen, the model management operator that translat...
OTM
2005
Springer
14 years 2 months ago
2005
Springer
There are many problems requiring a semantic account of a database schema. At its best, such an account consists of mapping formulas between the schema and a formal conceptual mode...
ER
2007
Springer
14 years 21 days ago
2007
Springer
This paper presents a methodology to derive views over a relational database by applying a sequence of appropriately defined operations to the global schema. Such tailoring and com...
VLDB
2004
ACM
14 years 9 months ago
2004
ACM
Abstract. In dynamic environments like the Web, data sources may change not only their data but also their schemas, their semantics, and their query capabilities.When a mapping is ...