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-rw-r--r--README.md4
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@@ -68,6 +68,10 @@ something like systemd.
It's a good idea to run `mqttt` as its own dedicated user.
+The special `+` and `#` wildcards can be used as path components. Additonally
+`#empty` path component can be used to represent a topic such as `foo//bar` as
+the filesystem path `foo/#empty/bar`.
+
## Known bugs
* Executables are run sequentially