diff --git a/foaf.md b/foaf.md
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+++ b/foaf.md
@@ -0,0 +1,12 @@
+# FOAF
+
+- An [[ontology]].
+- [[go]] https://en.wikipedia.org/wiki/FOAF_(ontology)
+  - ```[[FOAF]] (an acronym of friend of a friend) is a machine-readable ontology describing persons, their activities and their relations to other people and objects.```
+  - ```FOAF is (...) expressed using the Resource Description Framework ([[RDF]]) and the Web Ontology Language ([[OWL]]).```
+  - https://twitter.com/flancian/status/1348256343837310976
+
+
+[//begin]: # "Autogenerated link references for markdown compatibility"
+[go]: go "Go"
+[//end]: # "Autogenerated link references"
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diff --git a/journal/2021-01-10.md b/journal/2021-01-10.md
index 7e2fa9aa3..c763abc2f 100644
--- a/journal/2021-01-10.md
+++ b/journal/2021-01-10.md
@@ -15,4 +15,7 @@
   - [[vivaldi]]
 - [[frulic]]
 - [[virtualbox]]
-- [[robofriend]]
\ No newline at end of file
+- [[robofriend]]
+- [[FOAF]]
+  - [[RDF]]
+  - [[OWL]]
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