Nina Edelweiss

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This work presents an extension of the ODMG standard, called TV_ODMG. This extension aims to support object versioning and temporal features, like transaction and valid times. The extension is based on the Temporal Versions Model, an object-oriented data model that keeps object versions and, for each version, the history of the dynamic properties values.(More)
model space that consists of the semantic and the temporal dimensions. The evolution of data objects can quickly become intractable if it is not captured and Vocabulary evolution and versioning: ontologies, vocabularies, data level changes that in turn are more schema-specific and dependent on semantics. A formal model for temporal schema versioning in(More)
The need to represent and manage the temporal aspects of the geographic reality has demanded efforts in the geoprocessing area. The complexity of the spatio-temporal information manipulated by a Geographic Information System (GIS) has demanded special efforts for the creation of a conceptual data model able to represent reality phenomena naturally. This(More)
Development of a wide spread project intended to teaching Computer Science, integrating a considerable number of students all over a country with big geographical extension and scarce educational funding such as Brazil, is a complex task. The communication technology is an important factor in this case to maintain the expenses under control and assure the(More)
The Temporal Versions Model (TVM) is an Object Oriented Data Model developed to store the object versions and, for each version, the history of its dynamic attributes and relationships values. In this work, we propose a query language for this model. The language, called Temporal Versioned Query Language TVQL, is based on SQL, adding new features to recover(More)