In the past decade, machine learning based decision systems have been widely used in a wide range of application domains, like for example credit score, insurance risk, and health monitoring, in which accuracy is of the utmost importance. Although the support of these systems has a big potential to improve the decision in different fields, their use may present ethical and legal risks, such as codifying biases, jeopardizing transparency and privacy, reducing accountability. Unfortunately, these risks arise in different applications and they are made even more serious and subtly by the opacity of recent decision support systems, which often are complex and their internal logic is usually inaccessible to humans.

Nowadays most of the Artificial Intelligence (AI) systems are based on Machine Learning algorithms. The relevance and need of ethics in AI is supported and highlighted by various initiatives arising from the researches to provide recommendations and guidelines in the direction of making AI-based decision systems explainable and compliant with legal and ethical issues. These include the EU's GDPR regulation which introduces, to some extent, a right for all individuals to obtain "meaningful explanations of the logic involved" when automated decision making takes place, the "ACM Statement on Algorithmic Transparency and Accountability", the Informatics Europe's "European Recommendations on Machine-Learned Automated Decision Making" and "The ethics guidelines for trustworthy AI" provided by the EU High-Level Expert Group on AI.

The challenge to design and develop trustworthy AI-based decision systems is still open and requires a joint effort across technical, legal, sociological and ethical domains.

The purpose of XKDD, eXplaining Knowledge Discovery in Data Mining, is to encourage principled research that will lead to the advancement of explainable, transparent, ethical and fair data mining and machine learning. Also, this year the workshop will seek submissions addressing uncovered important issues into specific fields related to eXplainable AI (XAI) such as XAI for a more Social and Responsible AI, XAI as a tool to align AI with human values, XAI for Outlier and Anomaly Detection, quantitative and qualitative evaluation of XAI approaches, and XAI case studies. The workshop will seek top-quality submissions related to ethical, fair, explainable and transparent data mining and machine learning approaches. Papers should present research results in any of the topics of interest for the workshop as well as tools and promising preliminary ideas. XKDD asks for contributions from researchers, academia and industries, working on topics addressing these challenges primarily from a technical point of view, but also from a legal, ethical or sociological perspective.

Topics of interest include, but are not limited to:

• XAI for Trustworthy AI
• XAI for Social AI
• XAI to Align AI with Human Values
• XAI for Outlier and Anomaly Detection
• Quantitative and Qualitative Evaluation of XAI approaches
• Transparent-by Design Models
• XAI Case studies with real data
• XAI for Privacy-Preserving Systems
• XAI for Federated Learning
• XAI for Time Series based Approaches
• XAI for Graph based Approaches
• XAI for Visualization
• XAI in Human-Machine Interaction
• XAI in Human-in-the-Loop Interactions
• Counterfactual Explanations
• Human-Model Interfaces for XAI approaches
• Explainable Artificial Intelligence (XAI)
• Interpretable Machine Learning
• Transparent Data Mining
• XAI for Fairness Checking
• Multi-level XAI
• Explanation, Accountability and Liability from an Ethical and Legal Perspective

Submissions with a focus on uncovered important issues related to XAI are particularly welcome, e.g. XAI for fairness checking approaches, XAI for privacy-preserving systems, XAI for federated learning, XAI for time series and graph based approaches, XAI for visualization, XAI in human-machine interaction, benchmarking of XAI methods, and XAI case studies.

The call for paper can be dowloaded here.