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-rwxr-xr-xdoc/README.variables1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/README.variables b/doc/README.variables
index e7e94d239..c70b11439 100755
--- a/doc/README.variables
+++ b/doc/README.variables
@@ -37,6 +37,7 @@ ${CONTEXT} Current context
${PRIORITY} Current priority
${CHANNEL} Current channel name
${ENV(VAR)} Environmental variable VAR
+${LEN(VAR)} String length of VAR (integer)
${EPOCH} Current unix style epoch
${DATETIME} Current date time in the format: YYYY-MM-DD_HH:MM:SS
${UNIQUEID} Current call unique identifier