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Hybrid Edge-Cloud Asymmetric Analytics for Portable Multimodal BCI Biosensors. [PDF]

open access: yesBiosensors (Basel)
Ghosh S   +7 more
europepmc   +1 more source

Evolving services from a contractual perspective. [PDF]

open access: yes
Andrikopoulos, V.   +2 more
core  

X-Time: Schema Versioning and Cross-Version Querying in Data Warehouses

open access: yes2007 IEEE 23rd International Conference on Data Engineering, 2007
In this demo we present X-Time, a prototype for managing schema versioning in relational data warehouses, specifically oriented to support the formulation of cross-version queries, i.e., queries whose temporal horizon spans multiple versions. The key issue to increase querying flexibility is the introduction of augmented schemata that properly extend ...
Stefano Rizzi
exaly   +5 more sources

Schema Change Operations for Full Support of Schema Versioning in the τXSchema Framework

open access: yesInternational Journal of Information Technology and Web Engineering, 2014
tXSchema (Currim et al., 2004) is a framework (a language and a suite of tools) for the creation and validation of time-varying XML documents. A tXSchema schema is composed of a conventional XML Schema annotated with physical and logical annotations. All components of a tXSchema schema can evolve over time to reflect changes in the real-world.
Zouhaier Brahmia   +3 more
semanticscholar   +4 more sources
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Schema Versioning in Multi-temporal XML Databases

Seventh IEEE/ACIS International Conference on Computer and Information Science (icis 2008), 2008
Schema evolution keeps only the current data and the schema version after applying schema changes. On the contrary, schema versioning creates new schema versions and preserves old schema versions and their corresponding data. Much research work has recently focused on the problem of schema evolution in XML databases, but less attention has been devoted
Rafik Bouaziz, Zouhaier Brahmia
exaly   +3 more sources

ODMG Language Extensions for Generalised Schema Versioning Support

open access: yesInternational Conference on Conceptual Modeling, 1999
The management of different schema versions is required in long-lived database systems to accomplish data structural changes and represent their history. Once a suitable data model for schema versioning support has been defined, appropriate extensions must also be introduced in the data definition and manipulation languages.
F. Grandi, F. Mandreoli
semanticscholar   +3 more sources

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