diff --git a/zettelkasten id.md b/zettelkasten id.md
index e69de29bb..fb8ea8ccb 100644
--- a/zettelkasten id.md	
+++ b/zettelkasten id.md	
@@ -0,0 +1,4 @@
+- an [[id]] standard
+	- [[luhmann]] used hierarchical
+	- some later [[zettelkasten]] implementations use time based
+	- [[obsidian zettelkasten plugin]] uses 
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