diff --git a/common/images/EOSC-SIRS-report.png b/common/images/EOSC-SIRS-report.png
new file mode 100644
index 0000000..7024c8d
Binary files /dev/null and b/common/images/EOSC-SIRS-report.png differ
diff --git a/common/modules/policyactions.org b/common/modules/policyactions.org
new file mode 100644
index 0000000..51c6578
--- /dev/null
+++ b/common/modules/policyactions.org
@@ -0,0 +1,75 @@
+#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
+#+INCLUDE: "prelude.org" :minlevel 1
+
+* Paris Call
+  :PROPERTIES:
+  :CUSTOM_ID: main
+  :END:
+** The Paris call: Software Source Code is our Heritage
+  :PROPERTIES:
+  :CUSTOM_ID: pariscall2019
+  :END:
+*** :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][Their call is published on Feb 2019]] \pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+*** 
+    :PROPERTIES:
+    :BEAMER_COL: 1.06
+    :BEAMER_env: block
+    :END:
+    It's an important /policy tool/, already referenced and used ...
+    \hfill /yes, you can sign it!/\\
+    \vspace{10pt}
+   \hfill https://en.unesco.org/foss/paris-call-software-source-code \hfill\mbox{}
+
+** The EOSC SIRS report: Software Source Code and Open Science
+  :PROPERTIES:
+  :CUSTOM_ID: eoscsirs2020
+  :END:
+*** :B_column:BMCOL:
+    :PROPERTIES:
+    :BEAMER_col: .4
+    :BEAMER_env: column
+    :END:
+    #+ATTR_LATEX: :width .9\linewidth
+    file:EOSC-SIRS-report.png
+    #+BEAMER: \pause
+*** Important /policy tool/ in Open Science (Dec 2020)        :B_block:BMCOL:
+    :PROPERTIES:
+    :BEAMER_col: .6
+    :BEAMER_env: block
+    :END:
+    - 9 infrastructures
+      + 3 archives
+      + 3 open access publishers
+      + 3 aggregators
+    - recommendations
+      + *archive in Software Heritage, use SWHID*
+      + *open non profit*
+      + *default to open source* for research software
+#+latex:\begin{quote}
+    "all research software should be made available under an Open Source license by default, and all deviations from this default practice should be properly motivated"
+#+latex:\end{quote}	
+    See https://doi.org/10.2777/28598
+
+    
+   
diff --git a/common/modules/rdc-bio.org b/common/modules/rdc-bio.org
index 1329f17..98d7ae9 100644
--- a/common/modules/rdc-bio.org
+++ b/common/modules/rdc-bio.org
@@ -1,34 +1,37 @@
 #+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
 #+INCLUDE: "prelude.org" :minlevel 1
 * Introductions
   :PROPERTIES:
   :CUSTOM_ID: main
   :END:
 ** Short Bio: Roberto Di Cosmo
+  :PROPERTIES:
+  :CUSTOM_ID: bio
+  :END:
  # +BEAMER: \raisebox{-.5\height}{\includegraphics[width=.28\linewidth]{rdc}}
  Computer Science professor in Paris, now working at INRIA\\
  - /30 years/ of research (Theor. CS, Programming, Software Engineering, Erdos #: 3)\\
  - /20 years/ of Free and Open Source Software\\
  - /10 years/ building and directing structures for the common good\\
 
  \mbox{}\\
    \begin{minipage}[c]{0.18\linewidth}
      \includegraphics[width=1.0\linewidth]{rdc}
    \end{minipage}
    \begin{minipage}[c]{0.8\linewidth}
      \begin{description}
 %       \item[1998] \emph{Cybersnare} -- voice of French FOSS
        \item[1999] \emph{DemoLinux} -- first live GNU/Linux distro
 %       \item[2004] \emph{EDOS} -- check package dependencies
        \item[2007] \emph{Free Software Thematic Group}\\
                    %\tiny{\url{http://www.systematic-paris-region.org/fr/logiciel-libre}}\\
                    ~150 members ~40 projects ~200Me
        \item[2008] \emph{Mancoosi project} \url{www.mancoosi.org}
        \item[2010] \emph{IRILL} \url{www.irill.org}
        \item[2015] \emph{Software Heritage} at INRIA
        \item[2018] \emph{National Committee for Open Science}, France
      \end{description}
    \end{minipage}
 
 
 
diff --git a/talks-public/2020-12-19-Libreitalia/2020-12-19-Libreitalia.org b/talks-public/2020-12-19-Libreitalia/2020-12-19-Libreitalia.org
new file mode 100644
index 0000000..ce589fc
--- /dev/null
+++ b/talks-public/2020-12-19-Libreitalia/2020-12-19-Libreitalia.org
@@ -0,0 +1,419 @@
+#+COLUMNS: %40ITEM %10BEAMER_env(Env) %9BEAMER_envargs(Env Args) %10BEAMER_act(Act) %4BEAMER_col(Col) %10BEAMER_extra(Extra) %8BEAMER_opt(Opt)
+#+TITLE: Software Heritage: a common infrastructure to preserve our Software Commons
+# #+AUTHOR: Roberto Di Cosmo
+# #+EMAIL: roberto@dicosmo.org @rdicosmo @swheritage
+#+BEAMER_HEADER: \date[19/12/2020]{19/12/2020, \emph{LibreItalia}}
+#+BEAMER_HEADER: \title[(CC-BY 4.0) Preserving the Software Commons]{Software Heritage: a common infrastructure to preserve our Software Commons}
+#+BEAMER_HEADER: \author[Roberto Di Cosmo]{Roberto Di Cosmo\\Inria and Universit\'e de Paris}
+# #+BEAMER_HEADER: \setbeameroption{show notes on second screen}
+#+BEAMER_HEADER: \setbeameroption{hide notes}
+#+KEYWORDS: software heritage legacy preservation knowledge mankind technology
+#+LATEX_HEADER: \usepackage{tcolorbox}
+#+LATEX_HEADER: \definecolor{links}{HTML}{2A1B81}
+#+LATEX_HEADER: \hypersetup{colorlinks,linkcolor=,urlcolor=links}
+
+#
+# prelude.org contains all the information needed to export the main beamer latex source
+# use prelude-toc.org to get the table of contents
+#
+
+#+INCLUDE: "../../common/modules/prelude-toc.org" :minlevel 1
+
+
+#+INCLUDE: "../../common/modules/169.org"
+
+# +LaTeX_CLASS_OPTIONS: [aspectratio=169,handout,xcolor=table]
+
+#+LATEX_HEADER: \usepackage{bbding}
+#+LATEX_HEADER: \DeclareUnicodeCharacter{66D}{\FiveStar}
+
+#
+# If you want to change the title logo it's here
+#
+# +BEAMER_HEADER: \titlegraphic{\includegraphics[width=0.7\textwidth]{SWH-logo}}
+
+# aspect ratio can be changed, but the slides need to be adapted
+# - compute a "resizing factor" for the images (macro for picblocks?)
+#
+# set the background image
+#
+# https://pacoup.com/2011/06/12/list-of-true-169-resolutions/
+#
+#+BEAMER_HEADER: \pgfdeclareimage[height=90mm,width=160mm]{bgd}{swh-world-169.png}
+#+BEAMER_HEADER: \setbeamertemplate{background}{\pgfuseimage{bgd}}
+#+LATEX: \addtocounter{framenumber}{-1}
+* Introduction
+   #+INCLUDE: "../../common/modules/rdc-bio.org::#main" :only-contents t :minlevel 2
+** Software source code: a precious part of our heritage
+   #+INCLUDE: "../../common/modules/source-code-different-short.org::#softwareisdifferent" :only-contents t :minlevel 3
+** Software Commons, Open Science
+   #+INCLUDE: "../../common/modules/foss-commons.org::#commonsdef" :only-contents t
+#+BEAMER: \pause
+*** 
+    *Source code*: part of our commons\hfill ... pillar of Open Science! /(would require another talk)/
+#+BEAMER: \pause
+*** Precious, endangered /executable/ and /human readable/ knowledge
+    key people *passing away*, platforms (GoogleCode, Gitorious, etc.) closing down ...\\
+** Source code: /special/ and /endangered/                         :noexport:
+*** /Executable/ and /human readable/ knowledge \hfill copyright law :noexport:
+    /“Programs must be written for people to read, and only incidentally for machines to execute.”/\\
+    \hfill Harold Abelson
+#+BEAMER: \pause
+*** Software /evolves/ over time
+    - projects may last decades
+    - the /development history/ is key to its /understanding/
+#+BEAMER: \pause
+*** Complexity :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=python3-matplotlib.pdf, width=.6\linewidth
+    :END:
+    - /millions/ of lines of code
+    - large /web of dependencies/
+      + easy to break, difficult to maintain
+      + /research software/ a thin top layer
+    - sophisticated /developer communities/
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+#+BEAMER: \pause
+*** Precious, endangered /executable/ and /human readable/ knowledge
+    key people *passing away*, platforms (GoogleCode, Gitorious, etc.) closing down ...\\
+    \hfill no organised effort to catalog and archive it
+* Meet Software Heritage
+** Software Heritage in a nutshell \hfill www.softwareheritage.org
+#+BEAMER: \transdissolve
+#+INCLUDE: "../../common/modules/swh-goals-oneslide-vertical.org::#goals" :only-contents t :minlevel 3
+** Largest software archive, principled \hfill \url{http://bit.ly/swhpaper}
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width 0.5\linewidth
+   file:SWH-as-foundation-slim.png
+   #+latex: \end{center}
+   #+BEAMER: \pause
+   #+latex: \centering
+   #+ATTR_LATEX: :width \extblockscale{.6\linewidth}
+   file:2020-12-archive-growth.png
+   #+BEAMER: \pause
+*** Technology
+    :PROPERTIES:
+    :BEAMER_col: 0.34
+    :BEAMER_env: block
+    :END:
+    - transparency and FOSS
+    - replicas all the way down
+*** Content (billions!)
+    :PROPERTIES:
+    :BEAMER_col: 0.32
+    :BEAMER_env: block
+    :END:
+    - *intrinsic identifiers*
+    - facts and provenance
+*** Organization
+    :PROPERTIES:
+    :BEAMER_col: 0.33
+    :BEAMER_env: block
+    :END:
+    - non-profit
+    - multi-stakeholder
+
+** A dedicated core team
+   #+ATTR_LATEX: :width .6\linewidth
+   file:team-2020.png
+* Demo time!
+** A walkthrough
+   - Browse [[https://archive.softwareheritage.org][the archive]]
+   - Get and use SWHIDs ([[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][full specification available online]])
+   - 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]]
+   - [[https://save.softwareheritage.org][Trigger archival]] of your preferred software in a breeze
+   - [[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]]
+* Building for the long term ...
+** An international, non profit initiative...
+  :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: \small And many more ...\\
+    #+latex:\mbox{}~~~~~~~\tiny\url{www.softwareheritage.org/support/testimonials}
+#+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: \begin{center}
+   # #+LATEX: \includegraphics[width=\extblockscale{.2\linewidth}]{sponsors-levels.pdf}
+   #+LATEX: \colorbox{white}{\includegraphics[width=\extblockscale{1.4\linewidth}]{sponsors.pdf}}
+   #+LATEX: \end{center}
+#   - sponsoring / partnership :: \hfill \url{sponsorship.softwareheritage.org}
+*** :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
+** ... creating a mirror network ...
+*** Thomas Jefferson, February 18, 1791 :B_block:
+    :PROPERTIES:
+    :BEAMER_ACT:
+    :BEAMER_env: block
+    :END:      
+#+latex:  {\em
+  ...let us save what remains: not by vaults and locks which fence them
+  from the public eye and use in consigning them to the waste of time,
+  but by such a multiplication of copies, as shall place them beyond
+  the reach of accident.
+#+latex: }
+   #+BEAMER: \pause
+*** Welcoming ENEA                                                  :B_block:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=LogoENEAcompletoENG.png, leftpic=true, width=.7\linewidth
+    :END:
+     - first *institutional* mirror
+     - increased resilience
+     - *infrastructure* for researchers
+     - stepping stone to \endgraf
+       \hfill an international joint effort
+** ... raising awareness about Software Source Code
+   #+INCLUDE: "../../common/modules/policyactions.org::#pariscall2019" :only-contents t :minlevel 3
+** News : archiving /public/ code
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width 0.7\linewidth
+   file:codeetalab.png
+   #+latex: \end{center}
+#+BEAMER: \pause
+   https://code.etalab.gouv.fr
+** Breaking news: the EOSC SIRS report
+   #+INCLUDE: "../../common/modules/policyactions.org::#eoscsirs2020" :only-contents t :minlevel 3
+* Everybody is concerned
+** It's urgent to expand the archive
+*** Saving 250.000 endangered repositories...
+    - summer 2019: BitBucket announce Mercurial VCS phase out
+    - fall 2019: Software Heritage teams up with Octobus (funded by NLNet, thanks!)
+    - july 2020: BitBucket erases /250.000/ repositories
+    - august 2020: [[https://bitbucket-archive.softwareheritage.org][bitbucket-archive.softwareheritage.org]] is live
+#+BEAMER: \pause
+*** ... preserving the web of knowledge   \hfill  (Tweet [[https://twitter.com/gabrielaltay/status/1300218789762662401][is here]] ) :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_OPT: pic=bitbucket_swh_praise.png, width=.6\linewidth, leftpic=true
+    :END:
+
+\\
+    *Bottomline*\\
+    /explicit deposit/ is important, ...\\
+    \mbox{}\hfill ... and we must promote it...\hfill\mbox{}\\
+    \mbox{}\hfill ... but will never be enough.\\
+\mbox{}\\
+\mbox{}\hfill /(think also of all software dependencies!)/
+** So much to do, so many ways to get involved
+*** Development (selected examples):
+    - develop :: new /listers/ and /loaders/
+      + apply for a Sloan funded minigrant http://bit.ly/swhgrants (rolling basis)
+    - rescue :: and archive landmark legacy software
+      + use the SWHAP process https://www.softwareheritage.org/swhap
+#+BEAMER: \pause
+*** Policy, advocacy (selected examples):
+    - promote :: Software Heritage in (inter)national policy (AgID, EU, OGP, etc.)
+    - adopt :: Software Heritage (article, journals, public administration, etc.)
+    - advocate :: spread the word, make Software Heritage all over the world
+** Come in, we're open! \hfill www.softwareheritage.org
+#+BEGIN_EXPORT latex
+ \begin{center}
+ \includegraphics[width=.6\linewidth]{SWH-logo.pdf}
+ \end{center}
+ \begin{center}
+ {\large \url{www.softwareheritage.org} \hspace{4em} \url{@swheritage}}
+ \end{center}
+#+END_EXPORT
+#+LATEX: {\begin{center}\Large Everybody is concerned, everybody can help build\end{center}}
+*** The Library of Alexandria of code                            :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: 0.42
+    :BEAMER_OPT: pic=clock-spring-forward.png,width=.45\linewidth,leftpic=true
+    :END:
+    - recover the past
+    - structure the future
+*** A CERN for Software                                          :B_picblock:
+    :PROPERTIES:
+    :BEAMER_env: picblock
+    :BEAMER_COL: 0.5
+    :BEAMER_OPT: pic=atacama-telescope.jpg,width=.5\linewidth,leftpic=true
+    :END:
+    - build better software
+      + for industry
+      + for society as a whole
+
+* Appendix :B_appendix:
+  :PROPERTIES:
+  :BEAMER_env: appendix
+  :END:
+** 
+   \vfill
+   \centerline{\Huge Appendix}
+   \vfill
+* A peek under the hood
+** A peek under the hood
+    #+BEAMER: \begin{center}
+    #+BEAMER:   \mode<beamer>{\only<1>{\includegraphics[width=\extblockscale{1\textwidth}]{swh-dataflow-merkle-listers.pdf}}}
+    #+BEAMER:   \only<2-3>{\includegraphics[width=\extblockscale{1\textwidth}]{swh-dataflow-merkle.pdf}}
+    #+BEAMER: \end{center}
+#+BEAMER: \pause
+#+BEAMER: \pause
+   /Global development history/ permanently archived in a /unique/ git-like Merkle DAG
+   - *~400 TB* (uncompressed) blobs, *~20 B* nodes, *~280 B* edges
+   #   - *GitHub*, Gitlab.com, Bitbucket, /Gitorious/, /GoogleCode/, GNU, PyPi, Debian, NPM...
+** Software Heritage Identifiers (SWHID) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][link to full docs]]
+# #+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]]
+
+* SWHIDs by the example
+** A word on the trust model for systems of identifiers
+   \vspace{-5pt}
+*** Two general classes of systems of identifiers
+    - intrinsic :: /computed/ from the object /(no registry required, fully decentralised)/\\
+      /(e.g.: chemical notation, music notation, hashes, SWHIDs)/\pause
+    - extrinsic :: /assigned/ by an authority /(need a registry)/\\
+      /(e.g.: passport number, DOI, ARK, RRID, etc.)/\pause
+    \mbox{}\hfill See [[https://www.softwareheritage.org/2020/07/09/intrinsic-vs-extrinsic-identifiers/][the dedicated blog post]] for more details 
+#+BEAMER: \pause
+*** Trust model, extrinsic (e.g. DOIs)                              :B_block:
+    :PROPERTIES:
+    :BEAMER_COL: .5
+    :BEAMER_env: block
+    :END:
+#+ATTR_LATEX: :width \linewidth
+file:doi-vs-pid-1.pdf
+#+BEAMER: \pause
+*** Trust model, intrinsic (e.g. SWHIDs)                            :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .45
+    :END:
+#+ATTR_LATEX: :width .8\linewidth
+file:doi-vs-pid-3.pdf
+*** Trust model for DOIs with checksums                    :B_block:noexport:
+    :PROPERTIES:
+    :BEAMER_COL: .5
+    :BEAMER_env: block
+    :END:
+#+ATTR_LATEX: :width \linewidth
+file:doi-vs-pid-2.pdf
+***                                                :B_ignoreheading:noexport:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+** Software Heritage Identifiers (SWHID) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][link to full docs]]
+# #+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]]
+
+** A worked example
+    #+LATEX: \centering\forcebeamerstart
+    #+LATEX: \only<1>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_1.pdf}}}
+    #+LATEX: \only<2>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/contents.pdf}}}
+    #+LATEX: \only<3>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_2_contents.pdf}}}
+    #+LATEX: \only<4>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/directories.pdf}}}
+    #+LATEX: \only<5>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_3_directories.pdf}}}
+    #+LATEX: \only<6>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/revisions.pdf}}}
+    #+LATEX: \only<7>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_4_revisions.pdf}}}
+    #+LATEX: \only<8>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/releases.pdf}}}
+    #+LATEX: \only<9>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/merkle_5_releases.pdf}}}
+    #+LATEX: \only<10>{\colorbox{white}{\includegraphics[width=\extblockscale{\linewidth}]{git-merkle/snapshots.pdf}}}
+    #+LATEX: \forcebeamerend
+* News
+** Milestones                                                      :noexport:
+   #+INCLUDE: "../../common/modules/swh-key-dates.org::#keydates" :minlevel 3 :only-contents t
+** News : archiving /public/ code
+   #+latex: \begin{center}
+   #+ATTR_LATEX: :width 0.7\linewidth
+   file:codeetalab.png
+   #+latex: \end{center}
+#+BEAMER: \pause
+   https://code.etalab.gouv.fr
+** News : SWHAP
+*** Paris Call on Software Source Code
+    “[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”
+#+BEAMER: \pause
+*** SWHAP : an important step forward
+     - detailed guidelines to *curate* landmark legacy source code
+       and *archive* it on Software Heritage
+     - intense cooperation with *Università di Pisa* and *UNESCO*
+     - open to all, we'll promote it worldwide
+*** 
+    https://www.softwareheritage.org/swhap
+
diff --git a/talks-public/2020-12-19-Libreitalia/Makefile b/talks-public/2020-12-19-Libreitalia/Makefile
new file mode 100644
index 0000000..68fbee7
--- /dev/null
+++ b/talks-public/2020-12-19-Libreitalia/Makefile
@@ -0,0 +1 @@
+include ../Makefile.slides
diff --git a/talks-public/Makefile.slides b/talks-public/Makefile.slides
index d684ac3..699281a 100644
--- a/talks-public/Makefile.slides
+++ b/talks-public/Makefile.slides
@@ -1,34 +1,35 @@
 # Depends: rubber
 
 ORGS = $(wildcard *.org)
 TEXHOS = $(patsubst %.org,%.handout.tex,$(ORGS))
 TEXS = $(patsubst %.org,%.tex,$(ORGS))
 PDFS = $(patsubst %.org,%.pdf,$(ORGS))
 PDFHOS = $(patsubst %.org,%.handout.pdf,$(ORGS))
 
 export TEXINPUTS = :$(CURDIR)/../../common/latex/
 
 all: $(PDFS)
 
 handouts: $(PDFHOS)
 
 .PRECIOUS: $(TEXS)
 %.tex: %.org
 	../bin/export-org-to-beamer $<
+	perl -i -pe 's%../../common/modules%%' $@
 
 %.pdf: %.tex
 	rubber --unsafe -m pdftex $<
 
 %.handout.tex: %.tex
 	sed 's/\\documentclass[[]/\\documentclass[handout,/' $< > $@
 
 clean: $(patsubst %,%/clean,$(TEXS) $(TEXHOS)) clean-verbatim
 clean-verbatim:
 	rm -f *.vrb
 	rm -rf _minted*/
 
 %/clean:
 	if [ -f $* ]; then rubber -m pdftex --clean $* ; fi
 	rm -f $*
 
 distclean: clean