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-rw-r--r--doc/context/sources/general/manuals/luatex/luatex-math.tex4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/context/sources/general/manuals/luatex/luatex-math.tex b/doc/context/sources/general/manuals/luatex/luatex-math.tex
index 0fcf0e52f..5447835db 100644
--- a/doc/context/sources/general/manuals/luatex/luatex-math.tex
+++ b/doc/context/sources/general/manuals/luatex/luatex-math.tex
@@ -88,6 +88,10 @@ Unaltered:
\NC \type {\radical} \NC 0--7FFFFFF \NC \NR
\stoptabulate
+For practical reasons \type {\mathchardef} will silently accept values larger
+that \type {0x8000} and interpret it as \type {\Umathcharnumdef}. This is needed
+to satisfy older macro packages.
+
New primitives that are compatible with \XETEX:
\starttabulate[|l|l|l|l|]