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diff --git a/include/jsoncons_ext/jsonschema/schema_version.hpp b/include/jsoncons_ext/jsonschema/schema_version.hpp
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+++ b/include/jsoncons_ext/jsonschema/schema_version.hpp
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+// Copyright 2021 Daniel Parker
+// Distributed under the Boost license, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See https://github.com/danielaparker/jsoncons for latest version
+
+#ifndef JSONCONS_JSONSCHEMA_SCHEMA_VERSION_HPP
+#define JSONCONS_JSONSCHEMA_SCHEMA_VERSION_HPP
+
+#include <jsoncons/json.hpp>
+
+namespace jsoncons {
+namespace jsonschema {
+
+    class schema_version
+    {
+    public:
+        static bool contains(const string_view& url)
+        {
+            if (url.find("json-schema.org/draft-07/schema#") != string_view::npos)
+            {
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+    };
+
+
+} // namespace jsonschema
+} // namespace jsoncons
+
+#endif // JSONCONS_JSONSCHEMA_JSONSCHEMA_VERSION_HPP