diff --git a/src/web/web-base/defs/namespaces.inc b/src/web/web-base/defs/namespaces.inc
new file mode 100644
index 00000000000..1281719ee60
--- /dev/null
+++ b/src/web/web-base/defs/namespaces.inc
@@ -0,0 +1,6 @@
+NAMESPACE(HTML, "http://www.w3.org/1999/xhtml")
+NAMESPACE(MathML, "http://www.w3.org/1998/Math/MathML")
+NAMESPACE(SVG, "http://www.w3.org/2000/svg")
+NAMESPACE(XLink, "http://www.w3.org/1999/xlink")
+NAMESPACE(XML, "http://www.w3.org/XML/1998/namespace")
+NAMESPACE(XMLNS, "http://www.w3.org/2000/xmlns/")
diff --git a/src/web/web-base/namespaces.h b/src/web/web-base/namespaces.h
new file mode 100644
index 00000000000..c6091a7bf3f
--- /dev/null
+++ b/src/web/web-base/namespaces.h
@@ -0,0 +1,11 @@
+#pragma once
+
+namespace Web {
+
+enum struct Namespace {
+#define NAMESPACE(IDENT, _) IDENT,
+#include "defs/namespaces.inc"
+#undef NAMESPACE
+};
+
+} // namespace Web