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-rw-r--r--doc/disfluid.texi3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/disfluid.texi b/doc/disfluid.texi
index 06af9e4..9e0f3fa 100644
--- a/doc/disfluid.texi
+++ b/doc/disfluid.texi
@@ -1860,6 +1860,9 @@ if a slot should contain an URI value, you would pass @code{#:->sxml
uri->string} as options to the slot definition, and accept a string
value in the initialization function, that you would convert to an URI
with @code{string->uri}.
+
+Sometimes slots contain functional data that cannot be serialized. In
+this case, pass @code{#:->sxml 'ignore} to avoid serialization.
@end deftp
@deffn {function} read/xml @var{port}