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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)
+#
+# Software is all around us
+#
+#+INCLUDE: "prelude.org" :minlevel 1
+#+INCLUDE: "169.org"
+* How Software Heritage addresses ARDC
+  :PROPERTIES:
+  :CUSTOM_ID: main
+  :END:
+** What is at stake: ARDC \hfill in increasing order of difficulty
+  :PROPERTIES:
+  :CUSTOM_ID: ardc
+  :END:
+*** Archive
+    Research software artifacts must be properly *archived*\\
+    \hfill make sure we can /retrieve/ them (/reproducibility/)
+    #+BEAMER: \pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+\vspace{-.5em}
+*** Reference
+    Research software artifacts must be properly *referenced*\\
+    \hfill make sure we can /identify/ them (/reproducibility/)
+#+BEAMER: \pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+\vspace{-.5em}
+*** Describe
+    Research software artifacts must be properly *described*\\
+    \hfill make it easy to /discover/ and /reuse/ them (/visibility/)
+#+BEAMER: \pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+\vspace{-.5em}
+*** Cite/Credit
+    Research software artifacts must be properly *cited* /(not the same as referenced!)/\\
+    \hfill to give /credit/ to authors (/evaluation/!)
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+** Addressing the four ARDC needs (see [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]] for details)
+  :PROPERTIES:
+  :CUSTOM_ID: swh-ardc-short
+  :END:
+*** Archive (8B+ files, 140M+ projects)
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .5
+    :END:
+#+ATTR_LATEX: :width .8\linewidth
+   file:swh-dataflow-merkle.pdf
+\vspace{-1em}
+#+BEAMER: \pause
+   - [[https://save.softwareheritage.org][save.softwareheritage.org]]
+   - [[https://deposit.softwareheritage.org][deposit.softwareheritage.org]]
+# (HAL, IPOL)
+#+BEAMER: \pause
+*** Reference (20 billion SWHIDs)                                   :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .5
+    :END:
+    [[https://www.softwareheritage.org/2020/07/09/intrinsic-vs-extrinsic-identifiers/][Intrinsic, decentralised, cryptographically strong identifiers, SWHIDs]]
+\vspace{-1em}
+#+ATTR_LATEX: :width 1.02\linewidth
+    file:SWHID-v1.4_3.png
+    Now supported [[https://www.softwareheritage.org/2020/05/13/swhid-adoption/][in SPDX 2.2, Wikidata]] etc.
+#+BEAMER: \pause
+*** :B_ignoreheading:
+    :PROPERTIES:
+    :BEAMER_env: ignoreheading
+    :END:
+*** Describe                                                        :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .5
+    :END:
+    - /Intrinsic metadata/ from source code
+    - Contributed the [[https://codemeta.github.io/codemeta-generator/][Codemeta generator]]
+#+BEAMER: \pause
+*** Cite/Credit                                                     :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .5
+    :END:
+    - Contributed /software citation/ style
+      [[https://www.ctan.org/tex-archive/macros/latex/contrib/biblatex-contrib/biblatex-software][biblatex-software, v 1.2-2 now on CTAN]]
+
+** Addressing the A(archive) in ARDC (see [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]] for details)
+  :PROPERTIES:
+  :CUSTOM_ID: swh-a
+  :END:
+#+latex: \vspace{-1em}
+*** /Universal/ source code archive \hfill not only resarch \hfill (8B+ files, 140M+ projects)
+    :PROPERTIES:
+    :BEAMER_env: block
+    :END:
+#+ATTR_LATEX: :width .6\linewidth
+   file:swh-dataflow-merkle.pdf
+#+latex: \vspace{-1em}
+   - your research software /is likely there already/!
+#+BEAMER: \pause
+   - anyone can trigger archival with [[https://save.softwareheritage.org][save.softwareheritage.org]]
+#+BEAMER: \pause
+   - selected partners can push to the archive via [[https://deposit.softwareheritage.org][deposit.softwareheritage.org]]
+# (HAL, IPOL)
+#+BEAMER: \pause
+** Addressing the R(eference) in ARDC (see [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]] for details)
+  :PROPERTIES:
+  :CUSTOM_ID: swh-r
+  :END:
+#+latex: \vspace{-0.8em}
+*** Software Heritage Identifiers (SWHID) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][link to full docs]]  :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :END:
+    20+B [[https://www.softwareheritage.org/2020/07/09/intrinsic-vs-extrinsic-identifiers/][intrinsic, decentralised, cryptographically strong identifiers, SWHIDs]]
+# #+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=0.9\linewidth]{SWHID-v1.4_1.png}}}
+  #+LATEX: \mode<beamer>{\only<2>{\includegraphics[width=0.9\linewidth]{SWHID-v1.4_2.png}}}
+  #+LATEX: \only<3->{\includegraphics[width=0.9\linewidth]{SWHID-v1.4_3.png}}
+  #+LATEX: %\forcebeamerend
+*** 
+    :PROPERTIES:
+    :BEAMER_act: <4->
+    :BEAMER_env: block
+    :END:
+    Emerging standard : Linux Foundation [[https://spdx.github.io/spdx-spec/appendix-VI-external-repository-identifiers/#persistent-id][SPDX 2.2]]; IANA registered; WikiData [[https://www.wikidata.org/wiki/Property:P6138][P6138]]
+#+latex: \vspace{-0.5em}
+*** Full fledged /source code references/ for reproducibility       :B_block:
+    :PROPERTIES:
+    :BEAMER_act: <5->
+    :BEAMER_env: block
+    :END:
+    Examples: [[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]]; Guidelines available, see [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]] 
+#+BEAMER: \pause
+** Addressing D(escribe) and C(ite) in ARDC (see [[https://dx.doi.org/10.1007/978-3-030-52200-1_36][ICMS 2020]] for details)
+  :PROPERTIES:
+  :CUSTOM_ID: swh-dc
+  :END:
+*** Describe                                                        :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .5
+    :END:
+    - Collect /intrinsic metadata/
+    - Contributed the [[https://codemeta.github.io/codemeta-generator/][Codemeta generator]]
+#+ATTR_LATEX: :width .8\linewidth
+    file:CodeMetaGenerator.png
+#+BEAMER: \pause
+*** Cite/Credit                                                     :B_block:
+    :PROPERTIES:
+    :BEAMER_env: block
+    :BEAMER_COL: .5
+    :END:
+    - Contributed /software citation/ style
+      [[https://www.ctan.org/tex-archive/macros/latex/contrib/biblatex-contrib/biblatex-software][biblatex-software, v 1.2-2 now on CTAN]]
+#+ATTR_LATEX: :width .8\linewidth
+    file:BibLaTeX-swh.png