7 papers
Temporal Heterogeneous Graph Pretraining for Relational Deep Learning
Yixin Peng, Er Jin, Diego Collarana +1
Relational deep learning models database rows and foreign-key links as a heterogeneous graph for prediction from record attributes and relational context. These graphs contain two…
VisKG-LM: Compiling Knowledge Graphs into Visual Memory for Multiple-Choice Question Answering
Yixin Peng, Er Jin, Shiwei Luo +2
Knowledge graphs are usually integrated into question answering by encoding a retrieved subgraph with a graph neural network and fusing it with the language model in the online inf…
THGFM: Dual-Branch Temporal Heterogeneous Graph Fusion Model
Yixin Peng, Diego Collarana, Er Jin +1
Temporal heterogeneous graphs offer a natural abstraction for dynamic relational systems in which diverse node and relation types co-exist and evolve over time. Learning on such gr…
What Does ODRL Mean? A Cross-Level Ontological Grounding of Permissions, Prohibitions, and Duties in UFO-L
Daham M. Mustafa, Christoph Lange, Giancarlo Guizzardi +3
ODRL policy evaluators produce verdicts, but say nothing about the normative positions a policy brings into existence, the authority structures those positions presuppose, or who h…
Sort-Stratified Semantics for Temporal Conflict Detection in ODRL Policies
Daham M. Mustafa, Diego Collarana, Sabrina Kirrane +5
In the Open Digital Rights Language (ODRL), temporal constraints range over two sorts, instants and durations, but the comparison operators do not distinguish them. The same operat…
From Instructions to ODRL Usage Policies: An Ontology Guided Approach
Daham M. Mustafa, Abhishek Nadgeri, Diego Collarana +4
This study presents an approach that uses large language models such as GPT-4 to generate usage policies in the W3C Open Digital Rights Language ODRL automatically from natural lan…
XFSC: A Catalogue of Trustable Semantic Metadata for Data Services and Providers
Benedikt T. Arnold, Khalil Baydoun, Diego Collarana +7
In dataspaces, federation services facilitate key functions such as enabling participating organizations to establish mutual trust and assisting them in discovering data and servic…