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-rw-r--r--doc/property_replacer.html4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/property_replacer.html b/doc/property_replacer.html
index 6456296a..f4c4238e 100644
--- a/doc/property_replacer.html
+++ b/doc/property_replacer.html
@@ -160,6 +160,10 @@ than messages generated somewhere.
in templates for RFC5424 support, when the character set is know to be
Unicode.</td>
</tr>
+<td><b>$uptime</b></td>
+<td>system-uptime in seconds (as reported by operating system).
+</td>
+</tr>
<tr>
<td><b>$now</b></td>
<td>The current date stamp in the format YYYY-MM-DD</td>