Navigating through multiple temporal granularity objects

Managing and relating temporal information at different time units is an important issue in many applications and research areas, among them temporal object-oriented databases. Due to the semantic richness of the object-oriented data model, the introduction of multiple temporal granularities in such a model poses several interesting issues. In particular, object-oriented query languages provide a navigational approach to data access, performed via path expressions. We present an extension to path expressions to a multi-granularity context. The syntax and semantics of the proposed path expressions are formally defined.

[1]  Elisa Bertino,et al.  Querying multiple temporal granularity data , 2000, Proceedings Seventh International Workshop on Temporal Representation and Reasoning. TIME 2000.

[2]  Elisa Bertino,et al.  Navigational Accesses in a Temporal Object Model , 1998, IEEE Trans. Knowl. Data Eng..

[3]  Sushil Jajodia,et al.  Time Granularities in Databases, Data Mining, and Temporal Reasoning , 2000, Springer Berlin Heidelberg.

[4]  Yoav Shoham,et al.  Temporal Logics in AI: Semantical and Ontological Considerations , 1987, Artif. Intell..

[5]  Shashi K. Gadia,et al.  A homogeneous relational model and query languages for temporal databases , 1988, TODS.

[6]  Shashi K. Gadia,et al.  Temporal Databases: A Prelude to Parametric Data , 1993, Temporal Databases.

[7]  Umeshwar Dayal,et al.  A Uniform Model for Temporal and Versioned Object-oriented Databases , 1993, Temporal Databases.

[8]  Francesco Pinciroli,et al.  Applying object-oriented technologies in modeling and querying temporally oriented clinical databases dealing with temporal granularity and indeterminacy , 1997, IEEE Transactions on Information Technology in Biomedicine.

[9]  Elisa Bertino,et al.  A temporal object-oriented data model with multiple granularities , 1999, Proceedings. Sixth International Workshop on Temporal Representation and Reasoning. TIME-99.

[10]  R. G. G. Cattell,et al.  The Object Database Standard: ODMG-93 , 1993 .

[11]  Arie Segev,et al.  TOODM - A Temporal Object-Oriented Data Model with Temporal Constraints , 1991, ER.

[12]  Ramez Elmasri,et al.  The Consensus Glossary of Temporal Database Concepts - February 1998 Version , 1997, Temporal Databases, Dagstuhl.

[13]  Elisa Bertino,et al.  T-ODMG: an ODMG compliant temporal object model supporting multiple granularity management , 2003, Inf. Syst..

[14]  Ramez Elmasri,et al.  A consensus glossary of temporal database concepts , 1994, SGMD.