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    <article-meta>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Organizing Committee</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
          <xref ref-type="aff" rid="aff2">2</xref>
          <xref ref-type="aff" rid="aff3">3</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Renata Guizzardi Federal Uni. of Espírito Santo</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
          <xref ref-type="aff" rid="aff2">2</xref>
          <xref ref-type="aff" rid="aff3">3</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Brazil</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
          <xref ref-type="aff" rid="aff1">1</xref>
          <xref ref-type="aff" rid="aff2">2</xref>
          <xref ref-type="aff" rid="aff3">3</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Eric Yu University of Toronto</institution>
          ,
          <country country="CA">Canada</country>
        </aff>
        <aff id="aff1">
          <label>1</label>
          <institution>John Mylopoulos University of Ottawa</institution>
          ,
          <country country="CA">Canada</country>
        </aff>
        <aff id="aff2">
          <label>2</label>
          <institution>Michalis Pavlidis University of Brighton</institution>
          ,
          <country country="UK">UK</country>
        </aff>
        <aff id="aff3">
          <label>3</label>
          <institution>Tong Li Beijing Uni. of Technology</institution>
          ,
          <country country="CN">China</country>
        </aff>
      </contrib-group>
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  <body>
    <sec id="sec-1">
      <title>-</title>
      <p>The iStar workshop series is dedicated to the discussion of concepts, methods,
techniques, tools, and applications associated with i* and related goal modelling
approaches. The objective of the workshop is to provide a unique opportunity for
researchers in the area to exchange ideas, compare notes, promote interactions, and forge
new collaborations. In line with the RE20 conference theme “Requirements
Engineering for a Digital World”, this edition also seeks to explore how i* may be best applied
in the Digital World. For example, how does i* relate to other approaches that are
relevant in the Digital World? What are the objectives of these other works, and how can
they complement i*? How can i* interact with these works and support the
understanding of specific domains and the design of systems?</p>
      <p>Following successful workshops in Trento/Italy (2002), London/United Kingdom
(2005), Recife/Brazil (2008), Hammamet/Tunisia (2010), Trento/Italy (2011),
Valencia/Spain (2013), Thessaloniki/Greece (2014), Ottawa/Canada (2015), Beijing/China
(2016), Essen/Germany (2017), Tallinn/Estonia (2018), and Salvador/Brazil (2019),
this year, the Thirteenth International i* Workshop takes place in Zürich, Switzerland,
on September 1st, 2020. This year, the workshop runs in conjunction with the 28th IEEE
International Requirements Engineering Conference (RE’20), benefiting from the
common themes and interests shared by the two events.</p>
      <p>We keep an informal workshop format to promote and maximize interaction. Aiming
at an inclusive and discussion-oriented workshop, the main criterion for paper
acceptance in iStar’20 is relevance and potential for stimulating discussion and possible
collaborations among the participants. A 26-member program committee, consisting of
scholars and practitioners with expertise and interest in the field, was involved in
reviewing a total of 17 complete paper submissions. Each of the papers was reviewed by
three program committee members. Of the submitted papers, 14 were accepted for
presentation in the workshop and revised versions of the papers are included in the
proceedings that follow. Each paper was given 18 minutes for presentation and
discussion. Each presenter also served as a discussant to another paper, motivating and
diversifying the debate.</p>
      <p>iStar’20 included a keynote by Prof. Daniel Amyot, from the School of Electrical
Engineering and Computer Science at the University of Ottawa, entitled Two decades
of combined goal/process modeling: lessons learned and opportunities. Finally,
iStar’20 concluded with a final discussion to summarise debated topics and point out
further directions</p>
      <p>We would like to thank the authors for submitting their papers and all the members
of the Program Committee and additional reviewers for providing their expertise and
suggesting constructive advice to improve the quality of published papers. Last but not
least, we want to thank the organizers of the RE’20 conference for their valuable
support.</p>
    </sec>
    <sec id="sec-2">
      <title>Gunter Mussbacher</title>
      <p>McGill University, Canada</p>
      <sec id="sec-2-1">
        <title>Program Committee</title>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>Raian Ali</title>
      <p>Hamad Bin Khalifa University, Qatar</p>
    </sec>
    <sec id="sec-4">
      <title>Daniel Amyot</title>
    </sec>
    <sec id="sec-5">
      <title>University of Ottawa, Canada</title>
    </sec>
    <sec id="sec-6">
      <title>Joao Araujo</title>
      <p>Uni. NOVA de Lisboa, Portugal</p>
    </sec>
    <sec id="sec-7">
      <title>Basak Aydemir</title>
      <p>Boğaziçi University, Turkey</p>
    </sec>
    <sec id="sec-8">
      <title>Juan Pablo Carvallo</title>
      <p>Universidad del Azuay, Ecuador</p>
    </sec>
    <sec id="sec-9">
      <title>Jaelson Castro</title>
      <p>Uni. Federal de Pernambuco, Brazil</p>
    </sec>
    <sec id="sec-10">
      <title>Luiz Marcio Cysneiros</title>
      <p>York University, Canada</p>
    </sec>
    <sec id="sec-11">
      <title>Fabiano Dalpiaz</title>
      <p>Utrecht University, The Netherlands</p>
    </sec>
    <sec id="sec-12">
      <title>Sepideh Ghanavati</title>
      <p>University of Maine, USA</p>
    </sec>
    <sec id="sec-13">
      <title>Jennifer Horkoff</title>
      <p>Chalmers / U. of Gothenburg, Sweden</p>
    </sec>
    <sec id="sec-14">
      <title>Sotirios Liaskos</title>
      <p>York University, Canada</p>
      <sec id="sec-14-1">
        <title>Steering Committee</title>
      </sec>
    </sec>
    <sec id="sec-15">
      <title>Marcela Ruiz</title>
      <p>Zurich Univeristy of Applied Sciences,
Switzerland
Lin Liu
Tsinghua University, China</p>
    </sec>
    <sec id="sec-16">
      <title>Alejandro Maté</title>
      <p>University of Alicante, Spain</p>
    </sec>
    <sec id="sec-17">
      <title>Haralambos Mouratidis</title>
      <p>University of Brighton, UK</p>
    </sec>
    <sec id="sec-18">
      <title>Elda Paja</title>
      <p>IT Uni. of Copenhagen, Denmark</p>
    </sec>
    <sec id="sec-19">
      <title>Anna Perini</title>
      <p>Fond. Bruno Kessler Trento, Italy</p>
    </sec>
    <sec id="sec-20">
      <title>Angelo Susi</title>
      <p>Fondazione Bruno Kessler – Irst, Italy</p>
    </sec>
    <sec id="sec-21">
      <title>Jelena Zdravkovic</title>
      <p>Stockholm University, Sweden</p>
    </sec>
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