Reasoning over Extended ER Models
We investigate the computational complexity of reasoning over various fragments of the Extended Entity-Relationship (EER) language, which includes a...
On Order Dependencies for the Semantic Web
We consider the problem of adding both equality and order generating dependencies to Web ontology languages such as OWL...
Collection Type Constructors in Entity-Relationship Modeling
Collections play an important part in everyday life. Therefore, conceptual data models should support collection types to make data...
Schema Exchange: A Template-Based Approach to Data and Metadata Translation
In this paper we study the problem of schema exchange, a natural extension of the data exchange problem to...
A Conceptual Modeling Methodology Based on Niches and Granularity
This paper presents a methodology for conceptual modeling which is based on a new modeling primitive, the niche, and...
Modeling Collaborative Semantics with a Geographic Recommender
In the Semantic Web paradigm, geo-ontologies are closely related to geospatial information communities. Each community comes with its own...
Dynamically Traveling Web Service Clustering Based on Spatial and Temporal Aspects
Traditional web service orchestration is always implemented by business process work flow or I/O matching, just taking What services...
A Graph-Oriented Model and Query Language for Events
Different applications can be modeled by sets of interrelated events, such as, sequence of natural disaster events, events in...
PLR Partitions: A Conceptual Model of Maps
The traditional spatial data models model space in terms of points, lines, and regions. These models employ a disjoint...
A Conceptual Framework to Support Semantic Interoperability of Geospatial Datacubes
Today, we observe a wide use of geospatial databases that are implemented in many forms (e.g. transactional centralized systems,...
