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.

Authors

• Elisa Bertino
• Elena Ferrari 0001
• Giovanna Guerrini
• Isabella Merlo

Keywords

• Navigation
• Object oriented modeling
• Object oriented databases
• Data models
• Database languages
• Database systems
• Temporal Granularity
• Multiple Granularities
• Temporal Object
• Interesting Issue
• Query Language
• Expression Values
• Set Of Values
• Set Of Types
• Property Values
• Object Classification
• Types Of Values
• Temporal Expression
• Time Instants
• Typical Properties
• Temporal Model
• Classical Properties
• Temporal Interval
• Use Of Coercion
• Temporal Elements
• Examples Of Expression
• Intuitive Meaning