Negation in Relational Keyword Search
Keyword search in relational databases frees users from writing complicated SQL queries. However, negation is still not allowed in...
Stochastic Models to Improve E-News Recommender Systems
Several recommender systems have been proposed in the literature. Some of them address the problem of recommending news to...
Answering GPSJ Queries in a Polystore: A Dataspace-Based Approach
The discipline of data science is steering analysts away from traditional data warehousing and towards a more flexible and...
Data Management in the Era of Digitalization
In an increasingly digital world, the modeling and management of data is more important than ever as we move...
Keyword Search over RDF Datasets
This extended abstract first introduces the problem of keyword search overRDF datasets. Then, it expands the discussion to cover...
OOC-O: A Reference Ontology on Object-Oriented Code
With the rise of polyglot programming, different programming languages with different constructs have been combined in the same software...
Relations in Ontology-Driven Conceptual Modeling
For over a decade now, a community of researchers has contributed to the ontological foundations of Conceptual Modeling by...
Capturing Multi-level Models in a Two-Level Formal Modeling Technique
Conceptual models are often built with techniques that propose a strict stratification of entities into two classification levels: a...
An SQL o Front-End for Non-monotonic Inheritance and De-referencing
We revisit the issues of non-monotonic inheritance and structure traversal in object-relational databases with new insights to propose OO...
Modeling Data Lakes with Data Vault: Practical Experiences, Assessment, and Lessons Learned
Data lakes have become popular to enable organization-wide analytics on heterogeneous data from multiple sources. Data lakes store data...
