OTClean: Data Cleaning for Conditional Independence Violations using Optimal Transport

no code implementations • 4 Mar 2024 • Alireza Pirhadi, Mohammad Hossein Moslemi, Alexander Cloninger, Mostafa Milani, Babak Salimi

Ensuring Conditional Independence (CI) constraints is pivotal for the development of fair and trustworthy machine learning models.

Semi-Oblivious Chase Termination for Linear Existential Rules: An Experimental Study

1 code implementation • 22 Mar 2023 • Marco Calautti, Mostafa Milani, Andreas Pieris

In this work, we focus on the semi-oblivious version of the chase, which is well-suited for practical implementations, and linear existential rules, a central class of constraints with several applications.

Extending Sticky-Datalog+/- via Finite-Position Selection Functions: Tractability, Algorithms, and Optimization

no code implementations • 2 Aug 2021 • Leopoldo Bertossi, Mostafa Milani

We propose a bottom-up QA algorithm for programs in the class sch(S), for a general selection function S. As a particular case, we obtain a polynomial-time QA algorithm for JWS and weakly-sticky programs.

Position

Ontological Multidimensional Data Models and Contextual Data Qality

no code implementations • 1 Apr 2017 • Leopoldo Bertossi, Mostafa Milani

Data quality assessment and data cleaning are context-dependent activities.

The Ontological Multidimensional Data Model

no code implementations • 10 Mar 2017 • Leopoldo Bertossi, Mostafa Milani

In this extended abstract we describe, mainly by examples, the main elements of the Ontological Multidimensional Data Model, which considerably extends a relational reconstruction of the multidimensional data model proposed by Hurtado and Mendelzon by means of tuple-generating dependencies, equality-generating dependencies, and negative constraints as found in Datalog+-.

Extending Weakly-Sticky Datalog+/-: Query-Answering Tractability and Optimizations

no code implementations • 10 Jul 2016 • Mostafa Milani, Leopoldo Bertossi

We apply the magic-sets rewriting in combination with the proposed QA algorithm for the optimization of QA over JWS programs.

A Hybrid Approach to Query Answering under Expressive Datalog+/-

no code implementations • 22 Apr 2016 • Mostafa Milani, Andrea Cali, Leopoldo Bertossi

Datalog+/- is a family of ontology languages that combine good computational properties with high expressive power.

Tractable Query Answering and Optimization for Extensions of Weakly-Sticky Datalog+-

no code implementations • 13 Apr 2015 • Mostafa Milani, Leopoldo Bertossi

We consider a semantic class, weakly-chase-sticky (WChS), and a syntactic subclass, jointly-weakly-sticky (JWS), of Datalog+- programs.