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diff --git a/web/xhtml/fragment.hxx b/web/xhtml/fragment.hxx
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+++ b/web/xhtml/fragment.hxx
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+// file      : web/xhtml/fragment.hxx -*- C++ -*-
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef WEB_XHTML_FRAGMENT_HXX
+#define WEB_XHTML_FRAGMENT_HXX
+
+#include <string>
+#include <vector>
+#include <utility> // pair
+
+#include <libstudxml/parser.hxx>
+#include <libstudxml/forward.hxx>
+
+namespace web
+{
+  namespace xhtml
+  {
+    // A parsed (via xml::parser) XHTML fragment that can later be serialized
+    // to xml::serializer.
+    //
+    class fragment
+    {
+    public:
+      bool truncated = false;
+
+    public:
+      fragment () = default;
+
+      // Parse string as an XHTML document fragment, truncating it if
+      // requested. The fragment should be complete, in the sense that all
+      // elements should have closing tags. Elements and attributes are
+      // considered to be in the namespace of the entire XHTML document, so no
+      // namespace should be specified for them. Do not validate against XHTML
+      // vocabulary. Can throw xml::parsing exception.
+      //
+      fragment (const std::string& xhtml,
+                const std::string& input_name,
+                size_t length = 0);
+
+      void
+      operator() (xml::serializer&) const;
+
+      bool
+      empty () const {return events_.empty ();}
+
+    private:
+      std::vector<std::pair<xml::parser::event_type, std::string>> events_;
+    };
+  }
+}
+
+#endif // WEB_XHTML_FRAGMENT_HXX