activity
20162025
most citedCorrelation and Substitution in SPARQL

3 citations · 6 across the 6 of their papers we have counts for

collaborators

6 papers

cs.SE2025

AccessGuru: Leveraging LLMs to Detect and Correct Web Accessibility Violations in HTML Code

Nadeen Fathallah, Daniel Hernández, Steffen Staab

The vast majority of Web pages fail to comply with established Web accessibility guidelines, excluding a range of users with diverse abilities from interacting with their content.…

cs.AI2025

Predicate-Conditional Conformalized Answer Sets for Knowledge Graph Embeddings

Yuqicheng Zhu, Daniel Hernández, Yuan He +4

Uncertainty quantification in Knowledge Graph Embedding (KGE) methods is crucial for ensuring the reliability of downstream applications. A recent work applies conformal prediction…

cs.DB2024

DAGE: DAG Query Answering via Relational Combinator with Logical Constraints

Yunjie He, Bo Xiong, Daniel Hernández +3

Predicting answers to queries over knowledge graphs is called a complex reasoning task because answering a query requires subdividing it into subqueries. Existing query embedding m…

cs.LG2024

Is Complex Query Answering Really Complex?

Cosimo Gregucci, Bo Xiong, Daniel Hernandez +4

Complex query answering (CQA) on knowledge graphs (KGs) is gaining momentum as a challenging reasoning task. In this paper, we show that the current benchmarks for CQA might not be…

cs.LO2018★ 3 cited

The Problem of Correlation and Substitution in SPARQL -- Extended Version

Daniel Hernández, Claudio Gutierrez, Renzo Angles

Implementations of a standard language are expected to give same outputs to identical queries. In this paper we study why different implementations of SPARQL (Fuseki, Virtuoso, Bla…

cs.DB2016★ 3 cited

Correlation and Substitution in SPARQL

Daniel Hernández, Claudio Gutierrez, Renzo Angles

In the current SPARQL specification the notion of correlation and substitution are not well defined. This problem triggers several ambiguities in the semantics. In fact, implementa…