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-rw-r--r--mandoc_char.711
1 files changed, 9 insertions, 2 deletions
diff --git a/mandoc_char.7 b/mandoc_char.7
index 3416de36..520d0a31 100644
--- a/mandoc_char.7
+++ b/mandoc_char.7
@@ -481,8 +481,13 @@ Greek letters:
.It \e(ts Ta \(ts Ta sigma terminal
.El
.Sh PREDEFINED STRINGS
-These are not recommended for use, as they differ across
-implementations:
+Predefined strings are inherited from the macro packages of historical
+troff implementations.
+They are
+.Em not recommended
+for use, as they differ across implementations.
+Manuals using these predefined strings are almost certainly not
+portable.
.Pp
.Bl -column -compact -offset indent "Input" "Rendered" "Description"
.It Em Input Ta Em Rendered Ta Em Description
@@ -512,6 +517,8 @@ implementations:
.It \e*(>= Ta \*(>= Ta greater-than-equal
.It \e*(aa Ta \*(aa Ta acute
.It \e*(ga Ta \*(ga Ta grave
+.It \e*(Px Ta \*(Px Ta POSIX standard name
+.It \e*(Ai Ta \*(Ai Ta ANSI standard name
.El
.Sh NUMBERED CHARACTERS
For backward compatibility with existing manuals,