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-rw-r--r--doc/rsyslog_conf_filter.html7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/rsyslog_conf_filter.html b/doc/rsyslog_conf_filter.html
index 34839616..fbced4a3 100644
--- a/doc/rsyslog_conf_filter.html
+++ b/doc/rsyslog_conf_filter.html
@@ -117,6 +117,13 @@ currently supported:</p>
the property. There must be an exact match, wildcards are not supported.</td>
</tr>
<tr>
+<td>isempty</td>
+<td>Checks if the property is empty. The value is discarded. This is
+especially useful when working with normalized data, where some fields
+may be populated based on normalization result.
+Available since 6.6.2.
+</tr>
+<tr>
<td>isequal</td>
<td>Compares the "value" string provided and the property
contents. These two values must be exactly equal to match. The