diff --git a/reference/dir/versions.xml b/reference/dir/versions.xml
new file mode 100644
index 0000000000..6947aa42c4
--- /dev/null
+++ b/reference/dir/versions.xml
@@ -0,0 +1,37 @@
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diff --git a/reference/filesystem/versions.xml b/reference/filesystem/versions.xml
index 15320ff2f2..be7d82ba4d 100644
--- a/reference/filesystem/versions.xml
+++ b/reference/filesystem/versions.xml
@@ -1,9 +1,21 @@
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@@ -24,6 +36,53 @@
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diff --git a/reference/math/versions.xml b/reference/math/versions.xml
new file mode 100644
index 0000000000..87f348d6dd
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+++ b/reference/math/versions.xml
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diff --git a/reference/var/versions.xml b/reference/var/versions.xml
new file mode 100644
index 0000000000..51b9b03c15
--- /dev/null
+++ b/reference/var/versions.xml
@@ -0,0 +1,62 @@
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