X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=blobdiff_plain;f=doc%2Fsysdbql.7.txt;fp=doc%2Fsysdbql.7.txt;h=de7c7c472b754a442ee264870d83788a3eeee103;hp=9a16e23a4593f58f7ca582728e4828b6d68205aa;hb=01f0a453d80101b446886e3af8b0f9f8dd4d9141;hpb=518059384a38dbf5b4384c77dc859689ce80cc9d

diff --git a/doc/sysdbql.7.txt b/doc/sysdbql.7.txt
index 9a16e23..de7c7c4 100644
--- a/doc/sysdbql.7.txt
+++ b/doc/sysdbql.7.txt
@@ -129,6 +129,13 @@ Boolean expressions may use the following operators:
 	expression evaluates to NULL if the queried object does not exist (e.g.,
 	when accessing an attribute value).
 
+'<expression>' *IS TRUE*::
+'<expression>' *IS NOT TRUE*::
+'<expression>' *IS FALSE*::
+'<expression>' *IS NOT FALSE*::
+	Check whether an expression evaluates to a boolean *true* or *false* value
+	(or not).
+
 '<expression>' *IN* '<expression>'::
 '<expression>' *NOT IN* '<expression>'::
 	Checks whether the value of the first expression is included in the value