diff --git a/common/modules/swh-id-syntax.org b/common/modules/swh-id-syntax.org
index 3fb38c8..2da9906 100644
--- a/common/modules/swh-id-syntax.org
+++ b/common/modules/swh-id-syntax.org
@@ -1,16 +1,42 @@
 #+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
+** Software Heritage Identifiers (SWHIDs) \hfill [[https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html][(full spec)]]       :noexport:
+  :PROPERTIES:
+  :CUSTOM_ID: oneslide
+  :END:
+   #+LATEX: \centering
+   #+LATEX: \only<1>{\includegraphics[width=\linewidth]{SWH-ID-1.png}}
+   #+LATEX: \only<2>{\includegraphics[width=\linewidth]{SWH-ID-2.png}}
+   #+LATEX: \only<3->{\includegraphics[width=\linewidth]{SWH-ID-3.png}}
+   #+LATEX: \forcebeamerend \vspace{-6mm}
+*** 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 ="swh:"= URI prefix
+    - 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]]
+
 * The SWH-ID: the source code fingerprint
   :PROPERTIES:
   :CUSTOM_ID: main
   :END:
 ** The SWH-ID schema
   :PROPERTIES:
   :CUSTOM_ID: swh-id-syntax
   :END:
   #+LATEX: \centering\forcebeamerstart
   #+LATEX: \only<1>{\includegraphics[width=\linewidth]{SWH-ID-1.png}}
   #+LATEX: \only<2>{\includegraphics[width=\linewidth]{SWH-ID-2.png}}
   #+LATEX: \only<3>{\includegraphics[width=\linewidth]{SWH-ID-3.png}}
   #+LATEX: \forcebeamerend
-
diff --git a/common/modules/swhid.org b/common/modules/swhid.org
new file mode 120000
index 0000000..0b175c7
--- /dev/null
+++ b/common/modules/swhid.org
@@ -0,0 +1 @@
+swh-id-syntax.org
\ No newline at end of file