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+#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
+#+TITLE: Preservare il Software Bene Comune per il Futuro dell'Umanità
+#+BEAMER_HEADER: \date[2022-11-13, Torino]{13 Novembre 2022\\Biennale Tecnologia\\Torino, Italy\\[-2mm]}
+#+AUTHOR: Stefano Zacchiroli
+#+DATE: 13 Novembre 2022
+#+EMAIL: stefano.zacchiroli@telecom-paris.fr
+
+#+INCLUDE: "../../common/modules/prelude-toc.org" :minlevel 1
+#+INCLUDE: "../../common/modules/169.org"
+#+BEAMER_HEADER: \institute[Télécom Paris]{Télécom Paris, Institut Polytechnique de Paris\\ {\tt stefano.zacchiroli@telecom-paris.fr}}
+#+BEAMER_HEADER: \title[Preservare il Software Bene Comune]{Preservare il Software Bene Comune per il Futuro dell'Umanità}
+#+BEAMER_HEADER: \author{Stefano Zacchiroli}
+
+* Preface
+** About the speaker
+  :PROPERTIES:
+  :CUSTOM_ID: bio
+  :END:
+*** 
+    - Professor of Computer Science, Télécom Paris, Institut Polytechnique de
+      Paris
+    - Free/Open Source Software activist (20+ years)
+    - Debian Developer & Former 3x Debian Project Leader
+    - Former Open Source Initiative (OSI) director
+    - Software Heritage co-founder & CTO
+* The Software Commons
+** Software is everywhere (and a key mediator) in society
+#+latex: \begin{center}
+#+ATTR_LATEX: :width .7\linewidth
+file:software-center.pdf
+#+latex: \end{center}
+# #+INCLUDE: "../../common/modules/foss-commons.org::#freeswdef"
+** Free/Open Source Software (FOSS) is everywhere as well
+*** Free Software (1986)
+    :PROPERTIES:
+    :BEAMER_env: definition
+    :END:
+    A program is *free software* if the program's users have the four
+    /essential freedoms/:
+    - Freedom #0, to *run* the program, for any purpose
+    - Freedom #1, to *study* how the program works, and change it
+    - Freedom #2, to *redistribute* copies
+    - Freedom #3, to *improve* the program, and *release* improvements
+# #+INCLUDE: "../../common/modules/foss-commons.org::#commonsdef"
+*** linebreak                                               :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+Current estimates: 99% of software products on the market contains at least
+/some/ free software parts (Synopsis 2020).
+** The Commons and FOSS
+*** Definition (Commons)
+    The *commons* is the cultural and natural resources accessible to all
+    members of a society, including natural materials such as air, water, and a
+    habitable earth. These resources are held in common, not owned privately.
+*** Definition (Software Commons)
+    The *software commons* consists of all computer software which is available
+    at little or no cost and which can be altered and reused with few
+    restrictions. Thus /all open source software and all free software are part
+    of the [software] commons/. […]
+*** linebreak                                               :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+  Kranich and Schement (2008); Schweik and English (2012).
+** Software is dual-form knowledge
+#+INCLUDE: "../../common/modules/source-code-different-short.org::#thesourcecode" :only-contents t :minlevel 3
+** Software /source code/ is precious human knowledge
+#+INCLUDE: "../../common/modules/source-code-different-short.org::#softwareisdifferent" :only-contents t :minlevel 3
+* An Endangered Knowledge
+** But /where/ is this commons?
+   #+latex: \begin{flushleft}
+   #+ATTR_LATEX: :width \extblockscale{.7\linewidth}
+   file:myriadsources.png
+   #+latex: \end{flushleft}
+*** 
+    - many disparate *development* platforms, with a few dominant players (e.g.,
+      GitHub)
+    - a myriad places where *distribution* may happen
+    - most of them operated by *for-profit* companies
+** Calling for preservation: UNESCO
+*** :B_column:BMCOL:
+    :PROPERTIES:
+    :BEAMER_col: .53
+    :BEAMER_env: column
+    :END:
+    #+ATTR_LATEX: :width .7\linewidth
+    file:UNESCOParisCallMeeting.png
+    UNESCO, Inria, Software Heritage invite\\
+    [[https://en.unesco.org/news/experts-call-greater-recognition-software-source-code-heritage-sustainable-development][40 international experts meet in Paris]] ...
+    #+BEAMER: \pause
+*** :B_column:BMCOL:
+    :PROPERTIES:
+    :BEAMER_col: .5
+    :BEAMER_env: column
+    :END:
+    #+ATTR_LATEX: :width .65\linewidth
+    file:paris_call_ssc_cover.jpg
+    [[https://en.unesco.org/foss/paris-call-software-source-code][The call is published on Feb 2019]]\pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+*** 
+    :PROPERTIES:
+    :BEAMER_COL: 1.06
+    :BEAMER_env: block
+    :END:
+    “[We call to] support efforts to gather and preserve the artifacts and
+    narratives of the history of computing, while the earlier creators are still
+    alive”
+    \vspace{10pt}
+   \hfill https://en.unesco.org/foss/paris-call-software-source-code \hfill\mbox{}
+  
+** Calling for preservation: Donald Knuth and Len Shustek
+*** Communications of the ACM, February 2021                     :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=KnuthHistory.jpg, leftpic=true, width=.3\textwidth
+    :END:
+    /"Telling historical stories is the best way to teach. It's much easier to understand something if you know the threads it is connected to."/
+    \mbox{}\\
+    \mbox{}\\
+    \mbox{}\hfill /Let's Not Dumb Down the History of Computer Science/\\
+    \mbox{}\hfill Donald E. Knuth, Len Shustek\\
+    \mbox{}\hfill https://doi.org/10.1145/3442377
+#+BEAMER: \pause
+*** A unique opportunity
+    most of the creators are still here: we can talk to them!\\
+    \hfill but the clock is ticking...
+#    - Software Heritage provides a key infrastructure for software historians
+** Source code history for Open Science
+   #+INCLUDE: "../../common/modules/swh-ardc.org::#pillaropenscience" :only-contents t :minlevel 3
+#+BEAMER: \pause   
+*** 
+    \hfill Preserving the history of source code is important for /reproducibility/
+** Software source code is fragile
+#+INCLUDE: "../../common/modules/swh-motivations.org::#fragile" :only-contents t :minlevel 3
+** Takeaways                                                       :noexport:
+*** Software Commons
+- Good news: thanks to FOSS developers we are growing by the day a novel kind
+  of digital commons rich in valuable human knowledge: the *software commons*.
+*** Risk of losing it
+- However: there is a risk of "ruining" it (specifically: losing access to it
+  forever).
+- As per other commons (including traditional material commons, like natural
+  resources), we need to apply *individual care, public policies, and proactive
+  initiatives* to mitigate this risk.
+*** linebreak                                               :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause   
+... enter Software Heritage!
+* Avoiding the Tragedy of an Unattended Software Commons
+** Software Heritage in a nutshell \hfill www.softwareheritage.org
+   #+INCLUDE: "../../common/modules/swh-goals-oneslide-vertical.org::#goals" :only-contents t :minlevel 3
+** The largest public source code archive, principled \hfill \small \url{bit.ly/swhpaper}
+*** 
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_col: 0.5
+    :END:
+    #+latex: \centering
+    #+ATTR_LATEX: :width \linewidth
+    file:SWH-as-foundation-slim.png
+*** 
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_col: 0.5
+    :END:
+    #+latex: \centering
+    #+ATTR_LATEX: :width \linewidth
+    file:archive-growth.png\\
+    [[https://archive.softwareheritage.org][archive.softwareheritage.org]]
+*** linebreak                                               :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause
+*** Technology
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_col: 0.34
+    :END:
+    - transparency and FOSS
+    - replicas all the way down
+*** Content (billions!)
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_col: 0.32
+    :END:
+    - intrinsic identifiers
+    - facts and provenance
+*** Organization
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_col: 0.33
+    :END:
+    - non-profit
+    - multi-stakeholder
+** A peek under the hood: a global view on the software commons
+*** 
+    #+BEAMER: \begin{center}
+    #+BEAMER: \vspace{-2mm}
+    #+BEAMER: \includegraphics[width=.8\textwidth]{swh-dataflow-merkle.pdf}
+    #+BEAMER: \end{center}
+    #+BEAMER: \pause
+*** 
+    #+BEAMER: \vspace{-2mm} \small
+    A *global graph* linking together fully *deduplicated* source code artifact
+    (files, commits, directories, releases, etc.) to the places that distribute
+    them (e.g., Git repositories), providing a *unified view* on the entire
+    */Software Commons/*.
+
+    (Size: *~30 B* nodes, *~300 B* edges, *~1 PiB* blobs)
+** Software Heritage /intrinsic/ Identifiers (SWHID) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][(full spec)]]
+# #+INCLUDE: "../../common/modules/swh-id-syntax.org::#swh-id-syntax" :only-contents t :minlevel 3
+  #+LATEX: \centering%\forcebeamerstart
+  #+LATEX: \mode<beamer>{\only<1>{\includegraphics[width=\linewidth]{SWHID-v1.4_1.png}}}
+  #+LATEX: \mode<beamer>{\only<2>{\includegraphics[width=\linewidth]{SWHID-v1.4_2.png}}}
+  #+LATEX: \only<3->{\includegraphics[width=\linewidth]{SWHID-v1.4_3.png}}
+  #+LATEX: %\forcebeamerend
+*** An emerging standard :B_block:
+    :PROPERTIES:
+    :BEAMER_act: <4->
+    :BEAMER_COL: .6
+    :BEAMER_env: block
+    :END:
+    - in Linux Foundation's [[https://spdx.github.io/spdx-spec/appendix-VI-external-repository-identifiers/#persistent-id][SPDX 2.2]]
+    - IANA registered, WikiData property [[https://www.wikidata.org/wiki/Property:P6138][P6138]]
+*** Examples: :B_block:
+    :PROPERTIES:
+    :BEAMER_act: <5->
+    :BEAMER_COL: .4
+    :BEAMER_env: block
+    :END:
+    - [[https://archive.softwareheritage.org/swh:1:cnt:64582b78792cd6c2d67d35da5a11bb80886a6409;origin=https://github.com/virtualagc/virtualagc;lines=245-261/][Apollo 11 AGC excerpt]]
+    - [[https://archive.softwareheritage.org/swh:1:cnt:bb0faf6919fc60636b2696f32ec9b3c2adb247fe;origin=https://github.com/id-Software/Quake-III-Arena;lines=549-572/][Quake III rsqrt]]
+** Demo time!
+   - Browse [[https://archive.softwareheritage.org][the archive]]
+   - [[https://save.softwareheritage.org][Trigger archival]] of your preferred software in a breeze
+   - Get and use SWHIDs ([[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][full specification available online]])
+   - The [[https://www.softwareheritage.org/2019/07/20/archiving-and-referencing-the-apollo-source-code/][Apollo 11 AGC source code example]]
+   - Cite software [[https://www.softwareheritage.org/2020/05/26/citing-software-with-style/][with the biblatex-software style]] from CTAN
+   - Example use in a research article: compare Fig. 1 and conclusions 
+      - in [[http://www.dicosmo.org/Articles/2012-DaneluttoDiCosmo-Pcs.pdf][the 2012 version]]
+      - in [[https://www.dicosmo.org/share/parmap_swh.pdf][the updated version]] using SWHIDs and Software Heritage
+#   - Example use in a research article: extensive use of SWHIDs in [[https://www.dicosmo.org/Articles/2020-ReScienceC.pdf][a replication experiment]]
+   - Example in a journal: [[http://www.ipol.im/pub/art/2020/300/][an article from IPOL]]
+   - [[https://doc.archives-ouvertes.fr/en/deposit/deposit-software-source-code/][Curated deposit in SWH via HAL]], see for example: 
+      [[https://hal.archives-ouvertes.fr/hal-02130801][LinBox]], [[https://hal.archives-ouvertes.fr/hal-01897934][SLALOM]], [[https://hal.archives-ouvertes.fr/hal-02130729][Givaro]], [[https://hal.archives-ouvertes.fr/hal-02137040][NS2DDV]], [[https://hal.archives-ouvertes.fr/lirmm-02136558][SumGra]], [[https://hal.archives-ouvertes.fr/hal-02155786][Coq proof]], ...
+   - Rescue landmark legacy software, see the [[https://www.softwareheritage.org/swhap/][SWHAP process with UNESCO]]
+* Researching the Software Commons (highligts)
+#+INCLUDE: "../../common/modules/ese-research.org::#provenance" :only-contents t
+#+INCLUDE: "../../common/modules/ese-research.org::#diversity" :only-contents t
+#+INCLUDE: "../../common/modules/dataset.org::#graphdataset" :minlevel 2
+** The Software Commons is growing fast and becoming more diverse  :noexport:
+An observatory on the Software Commons enables studying broad phenomena and
+trends.
+#+BEAMER: \begin{center} \includegraphics[width=\textwidth]{revision_content_growth_wide.png} \end{center}
+- *Original content* released as public code doubles every 22-30 months (Di
+  Cosmo, Rousseau, Zacchiroli. Emp.Sw.Eng. 2020).
+- Other examples: long-term population trends such as *gender diversity*
+  (Zacchiroli, IEEE Software 2021) and *geography diversity* (Rossi and
+  Zacchiroli. ICSE 2022 & MSR 2022) in public code.
+* Preserving the Software Commons --- Present and Future
+** Academia & policy: growing adoption (selection)
+   #+INCLUDE: "../../common/modules/swh-adoption-academic.org::#adoption" :only-contents t :minlevel 3   
+** An international, non profit initiative\hfill built for the long term
+  :PROPERTIES:
+  :CUSTOM_ID: support
+  :END:
+*** Sharing the vision                                              :B_block:
+  :PROPERTIES:
+  :CUSTOM_ID: endorsement
+  :BEAMER_COL: .5
+  :BEAMER_env: block
+  :END:
+   #+LATEX: \begin{center}{\includegraphics[width=\extblockscale{.4\linewidth}]{unesco_logo_en_285}}\end{center}
+   #+LATEX: \vspace{-0.8cm}
+   #+LATEX: \begin{center}\vskip 1em \includegraphics[width=\extblockscale{1.4\linewidth}]{support.pdf}\end{center}
+   #+latex:\begin{center}\tiny\url{www.softwareheritage.org/support/testimonials}\end{center}
+  # #+BEAMER: \pause
+*** Donors, members, sponsors                                       :B_block:
+    :PROPERTIES:
+    :CUSTOM_ID: sponsors
+    :BEAMER_COL: .5
+    :BEAMER_env: block
+    :END:
+   #+LATEX: \begin{center}\includegraphics[width=\extblockscale{.4\linewidth}]{inria-logo-new}\end{center}
+   #+LATEX: \vspace{-1cm}
+   #+LATEX: \begin{center}
+   #+LATEX: \colorbox{white}{\includegraphics[width=\extblockscale{1.4\linewidth}]{sponsors.pdf}}
+   #+LATEX: \end{center}
+   #+latex:\begin{center}\tiny\url{www.softwareheritage.org/support/sponsors}\end{center}
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+*** Research collaboration                              :B_picblock:noexport:
+  :PROPERTIES:
+  :BEAMER_COL: .5
+  :BEAMER_env: picblock
+  :BEAMER_OPT: pic=Qwant_Logo, leftpic=true
+  :END:
+    source code search engine
+*** See more                                                       :noexport:
+    \hfill\tiny\url{http:://www.softwareheritage.org/support/testimonials}
+*** Global network                                      :B_picblock:noexport:
+    :PROPERTIES:
+    :BEAMER_COL: .5
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=fossid, leftpic=true, width=.3\linewidth
+    :END:
+     - first *independent mirror*
+     - increased reliability
+
+** You can help!
+*** Foster adoption and best practices
+      + [[https://www.softwareheritage.org/save-and-reference-research-software/][archive and reference relevant source code]] (save code now, and [[https://hal.inria.fr/hal-01872189][deposit]])
+      + use Software Heritage in research articles, journals, and books
+      + [[https://www.softwareheritage.org/swhap/][rescue and preserve landmark legacy source code]] with SWHAP and Software Stories
+# #+BEAMER: \pause
+*** Engage with Software Heritage as an individual
+    - join the [[https://www.softwareheritage.org/ambassadors/][ambassador program]], help raise awareness
+    - contribute to [[https://www.softwareheritage.org/community/developers/][technical]] and [[https://www.softwareheritage.org/community/scientists/][scientific]] development
+# #+BEAMER: \pause
+*** Engage with Software Heritage as an organization
+    - become [[https://www.softwareheritage.org/support/sponsors/][a member/sponsor]]
+    - build a Software Heritage mirror
+** Thank you!
+*** Resources
+  - homepage :: [[https://www.softwareheritage.org/][www.softwareheritage.org]]
+  - archive :: [[https://archive.softwareheritage.org/][archive.softwareheritage.org]]
+  - blog :: [[https://www.softwareheritage.org/blog/][www.softwareheritage.org/blog]]
+  - newsletter :: [[https://www.softwareheritage.org/newsletter/][www.softwareheritage.org/newsletter]]
+
+*** Selected references
+  #+BEGIN_EXPORT latex
+  \begin{thebibliography}{Foo Bar, 1969}
+  \footnotesize
+
+  \bibitem{DiCosmo2017} Roberto Di Cosmo, Stefano Zacchiroli
+  \newblock Software Heritage: Why and How to Preserve Software Source Code
+  \newblock iPRES 2017: Intl. Conf. on Digital Preservation
+
+  \bibitem{Abramatic2018} J.F. Abramatic, R. Di Cosmo, S. Zacchiroli,
+  \newblock Building the Universal Archive of Source Code
+  \newblock Communications of the ACM, October 2018
+
+  \end{thebibliography}
+  #+END_EXPORT
+
+  #+BEAMER: \footnotesize ~\\
+  (complete bibliography: [[https://www.softwareheritage.org/publications][www.softwareheritage.org/publications]])
+
+* Appendix                                                       :B_appendix:
+  :PROPERTIES:
+  :BEAMER_env: appendix
+  :END:
+** 
+   \vfill
+   \centerline{\Huge Appendix}
+   \vfill
+
+#+INCLUDE: "../../common/modules/status-extended.org::#archivinggoals" :minlevel 2
+#+INCLUDE: "../../common/modules/status-extended.org::#architecture" :minlevel 2 :only-contents t
+#+INCLUDE: "../../common/modules/status-extended.org::#merkletree" :minlevel 2
+#+INCLUDE: "../../common/modules/data-model.org::#merklestruct" :minlevel 2
+#+INCLUDE: "../../common/modules/status-extended.org::#dagdetailsmall" :minlevel 2 :only-contents t
diff --git a/talks-public/2022-11-13-biennale/Makefile b/talks-public/2022-11-13-biennale/Makefile
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+include ../Makefile.slides