diff --git a/core/vector/cmatch.xml b/core/vector/cmatch.xml
index eead8c6b..94964e00 100644
--- a/core/vector/cmatch.xml
+++ b/core/vector/cmatch.xml
@@ -221,5 +221,28 @@
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+ \ref{_vector-to-class_} converts a vector into a classification.
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+ Classification of
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