X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/9aa35e9ce70bb9bf61e4e4dbc7089e49eeded1b3..59b87190a41a0ac34aee74edfff9184785a73485:/doc/doc-docbook/spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 6f6ee4557..14486cf59 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -10038,8 +10038,13 @@ string.
 .cindex "expansion" "base64 encoding"
 .cindex "base64 encoding" "in string expansion"
 .cindex "&%base64%& expansion item"
+.cindex certificate "base64 of DER"
 This operator converts a string into one that is base64 encoded.
 
+If the string is a single variable of type certificate,
+returns the base64 encoding of the DER form of the certificate.
+
+
 .vitem &*${base64d:*&<&'string'&>&*}*&
 .cindex "expansion" "base64 decoding"
 .cindex "base64 decoding" "in string expansion"