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      <title-group>
        <article-title>XAI.it 2021 - Preface to the Second Italian Workshop on Explainable Artificial Intelligence</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Cataldo Musto</string-name>
          <email>cataldo.musto@uniba.it</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Riccardo Guidotti</string-name>
          <email>riccardo.guidotti@unipi.it</email>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Anna Monreale</string-name>
          <email>anna.monreale@unipi.it</email>
          <xref ref-type="aff" rid="aff1">1</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Giovanni Semeraro</string-name>
          <email>giovanni.semeraro@uniba.it</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Department of Computer Science, University of Bari Aldo Moro</institution>
          ,
          <addr-line>Bari</addr-line>
          ,
          <country country="IT">Italy</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>Department of Computer Science, University of Pisa</institution>
          ,
          <addr-line>Pisa</addr-line>
          ,
          <country country="IT">Italy</country>
        </aff>
      </contrib-group>
      <pub-date>
        <year>1853</year>
      </pub-date>
      <fpage>0000</fpage>
      <lpage>0001</lpage>
      <abstract>
        <p>Artificial Intelligence systems are increasingly playing an increasingly important role in our daily lives. As their importance in our everyday lives grows, it is fundamental that the internal mechanisms that guide these algorithms are as clear as possible. It is not by chance that the recent General Data Protection Regulation (GDPR) emphasized the users' right to explanation when people face artificial intelligencebased technologies. Unfortunately, the current research tends to go in the opposite direction, since most of the approaches try to maximize the efectiveness of the models (e.g., recommendation accuracy) at the expense of the explainability and the transparency. The main research questions which arise from this scenario is straightforward: how can we deal with such a dichotomy between the need for efective adaptive systems and the right to transparency and interpretability? Several research lines are triggered by this question: building transparent intelligent systems, analyzing the impact of opaque algorithms on ifnal users, studying the role of explanation strategies, investigating how to provide users with more control in the behavior of intelligent systems. XAI.it, the Italian workshop on Explainable AI, tries to address these research lines and aims to provide a forum for the Italian community to discuss problems, challenges and innovative approaches in the various sub-fields of XAI.</p>
      </abstract>
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    <sec id="sec-1">
      <title>1. Background and Motivations</title>
      <p>Nowadays we are witnessing a new summer of Artificial Intelligence, since the AI-based
algorithms are being adopting in a growing number of contexts and applications domains,
ranging from media and entertainment to medical, finance and legal decision-making. While
the very first AI systems were easily interpretable, the current trend showed the rise of opaque
methodologies such as those based on Deep Neural Networks (DNN), whose (very good)
efectiveness is contrasted by the enormous complexity of the models, which is due to the huge
number of layers and parameters that characterize these models.</p>
      <p>As intelligent systems become more and more widely applied (especially in very “sensitive”
domain), it is not possible to adopt opaque or inscrutable black-box models or to ignore the
nEvelop-O
LGOBE</p>
      <p>http://www.di.uniba.it/~swap/musto (C. Musto); https://kdd.isti.cnr.it/people/guidotti-riccardo (R. Guidotti);
general rationale that guides the algorithms in the task it carries on Moreover, the metrics
that are usually adopted to evaluate the efectiveness of the algorithms reward very opaque
methodologies that maximize the accuracy of the model at the expense of the transparency and
explainability.</p>
      <p>This issue is even more felt in the light of the recent experiences, such as the General Data
Protection Regulation (GDPR) and DARPA’s Explainable AI Project, which further emphasized
the need and the right for scrutable and transparent methodologies that can guide the user in a
complete comprehension of the information held and managed by AI-based systems.</p>
      <p>Accordingly, the main motivation of the workshop is simple and straightforward: how can
we deal with such a dichotomy between the need for efective intelligent systems and the right
to transparency and interpretability?</p>
      <p>These questions trigger several lines, that are particularly relevant for the current research
in AI. The workshop tries to address these research lines and aims to provide a forum for the
Italian community to discuss problems, challenges and innovative approaches in the area.</p>
    </sec>
    <sec id="sec-2">
      <title>2. Accepted Papers</title>
      <p>We believe that the program provides a good balance between the diferent topics related to
the area of Explainable AI. Moreover, the program will be further enriched through a keynote
given by Fabrizio Silvestri from La Sapienza University of Rome.</p>
      <p>The accepted papers range from the definition of new methodologies to explain the behavior
of artificial intelligence systems to the development of new applications implementing the
principles of Explainable AI. In total, 6 contributions were accepted at XAI.it 2021:</p>
    </sec>
    <sec id="sec-3">
      <title>3. Program Committee</title>
      <p>As a final remark, the program co-chairs would like to thank all the members of the Program
Committee (listed below), as well as the organizers of the AIxIA 2021 Conference1.
• Davide Bacciu, Università di Pisa</p>
    </sec>
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