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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: Referencing (all) publicly available software source code
+#+SUBTITLE: ... with Software Heritage !
+#+AUTHOR: Stefano Zacchiroli
+#+DATE: 9 September 2020
+#+EMAIL: zack@upsilon.cc
+
+#+INCLUDE: "../../common/modules/prelude.org" :minlevel 1
+#+INCLUDE: "../../common/modules/169.org"
+#+BEAMER_HEADER: \date[WOOC 2020]{9 September 2020\\Workshop on Open Citations\\and Open Scholary Metadata 2020\\[-2ex]}
+#+BEAMER_HEADER: \institute[UParis \& Inria]{Université de Paris \& Inria --- {\tt zack@upsilon.cc, @zacchiro}}
+
+* Software Heritage
+
+** Software Heritage in a nutshell \hfill [[https://softwareheritage.org][softwareheritage.org]]
+   #+INCLUDE: "../../common/modules/swh-goals-oneslide-vertical.org::#goals" :only-contents t
+
+** The Software Heritage Archive \hfill [[https://archive.softwareheritage.org][archive.softwareheritage.org]]
+   #+INCLUDE: "../../common/modules/status-extended.org::#archive" :only-contents t
+
+* Saving and referencing research software
+
+** Saving and referencing research software
+*** 
+    1. *Prepare your public repository*\\
+       =README=, =AUTHORS=, & =LICENSE= files + metadata (e.g., CodeMeta)
+    2. *Save your code*\\
+       [[https://save.softwareheritage.org][https://save.softwareheritage.org]]
+    3. *Reference your work*
+       #+BEAMER: \hfill
+       → using SWHIDs ! (next slide) \\
+       full repository, specific version, or code fragment
+*** Learn more
+    - /[[https://www.softwareheritage.org/2019/08/05/saving-and-referencing-research-software-in-software-heritage/][Saving and referencing research software in Software Heritage]]/\\
+      on the Software Heritage blog, August 2019
+    - /[[https://annex.softwareheritage.org/public/guidelines/archive-research-software.pdf][How to use Software Heritage for archiving and referencing your source
+      code: guidelines and walkthrough]]/
+      #+BEAMER: \footnotesize
+      https://annex.softwareheritage.org/public/guidelines/archive-research-software.pdf
+    
+** Software Heritage Identifiers (SWHIDs) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][(link to 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
+*** Standardization                                                 :B_block:
+    :PROPERTIES:
+    :BEAMER_act: <4->
+    :BEAMER_COL: .6
+    :BEAMER_env: block
+    :END:
+    - Linux Foundation [[https://spdx.github.io/spdx-spec/appendix-VI-external-repository-identifiers/#persistent-id][SPDX 2.2]]
+    - IANA registered "swh:" URI prefix
+    - Wikidata property [[https://www.wikidata.org/wiki/Property:P6138][P6138]]
+    #+BEAMER: \vspace{-1mm}
+*** 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]]
+
+
+** =biblatex-software=
+  #+BEAMER: \vspace{-1mm}
+*** Referencing software with SWHIDs
+    - *citing v. referencing* software are separate concerns in scholarly works
+    - *referencing* is an often neglected need, but a particularly important
+      one in the context of scientific reproducibility
+    - *SWHID:* an identifier scheme to address source code referencing needs
+  #+BEAMER: \vspace{-1mm}
+*** Citing software with =biblatex-software= \hfill (sample [[http://ctan.mines-albi.fr/macros/latex/contrib/biblatex-contrib/biblatex-software/biblio.bib][=.bib=]])
+    - =biblatex-software=: a BibTeX extension to support citing software
+    - citable artifacts: *software*, *software versions*, *software modules*,
+      *code fragments*
+    - support SWHID (where appropriate) to /reference/ underling artifacts
+  #+BEAMER: \vspace{-1mm}
+*** Learn more
+    - /[[https://www.softwareheritage.org/2020/05/26/citing-software-with-style/][Citing software with style]]/, Software Heritage blog, May 2020
+    - /[[http://mirrors.ctan.org/macros/latex/contrib/biblatex-contrib/biblatex-software/software-biblatex.pdf][CTAN package documentation]]/
+
+* Conclusion
+** Wrapping up
+*** strut                                                   :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+    #+BEAMER: \vspace{-2mm}
+*** 
+    #+BEAMER: \small \setlength{\itemsep}{0pt}
+    - Software Heritage is the largest archive of *public software source
+      code*.\\
+      It supports scholars in *archiving and referencing* source code relevant
+      to their work
+    - *Referencing and citing software* are separate concerns in scholarly
+      workflows
+    - *SWHID* identifiers are an adopted standard to /reference/ source code
+      artifacts
+    - *biblatex-software* allow to /cite/ software artifacts and integrates
+      well with SWHIDs
+    #+BEAMER: \vspace{-1mm}
+*** strut                                                   :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+    #+BEAMER: \vspace{-2mm}
+*** 
+    #+BEGIN_EXPORT latex
+    \begin{thebibliography}{Foo Bar, 1969}
+    \vspace{-1mm}
+    \scriptsize
+    \bibitem{Abramatic2018} Jean-François Abramatic, Roberto Di Cosmo, Stefano Zacchiroli
+    \newblock Building the Universal Archive of Source Code
+    \newblock Communication of the ACM, October 2018
+    \bibitem{DiCosmo2020a} Roberto Di Cosmo, Morane Gruenpeter, Stefano Zacchiroli
+    \newblock Referencing Source Code Artifacts: a Separate Concern in Software Citation
+    \newblock Computing in Science \& Engineering, 2020, ISSN: 1521-9615
+    \bibitem{DiCosmo2020d} Roberto Di Cosmo
+    \newblock Archiving and Referencing Source Code with Software Heritage
+    \newblock International Congress on Mathematical Software (ICMS), 2020
+    \end{thebibliography}
+    #+END_EXPORT
+*** strut                                                   :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+    #+BEAMER: \vspace{-2mm}
+*** 
+    [[https://upsilon.cc/~zack/][Stefano Zacchiroli]] / [[mailto:zack@upsilon.cc][zack@upsilon.cc]] / [[https://twitter.com/zacchiro][@zacchiro]] / [[https://mastodon.xyz/@zacchiro][@zacchiro@mastodon.xyz]]
+
+* Appendix                                                       :B_appendix:
+  :PROPERTIES:
+  :BEAMER_env: appendix
+  :END:
diff --git a/talks-public/2020-09-09-wooc/Makefile b/talks-public/2020-09-09-wooc/Makefile
new file mode 100644
index 0000000..68fbee7
--- /dev/null
+++ b/talks-public/2020-09-09-wooc/Makefile
@@ -0,0 +1 @@
+include ../Makefile.slides