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diff --git a/ucb/source/ucp/webdav-curl/PropfindCache.hxx b/ucb/source/ucp/webdav-curl/PropfindCache.hxx
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+++ b/ucb/source/ucp/webdav-curl/PropfindCache.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_UCB_SOURCE_UCP_WEBDAV_NEON_PROPFINDCACHE_HXX
+#define INCLUDED_UCB_SOURCE_UCP_WEBDAV_NEON_PROPFINDCACHE_HXX
+
+#include <sal/types.h>
+#include <rtl/ustring.hxx>
+#include <mutex>
+#include <map>
+#include <vector>
+
+#include "DAVResource.hxx"
+
+namespace http_dav_ucp
+{
+    // A property names cache mechanism, URL driven.
+    // It is used to cache the property names received
+    // from the WebDAV server, to minimize the need of
+    // net transactions (e.g. PROPFIND).
+    // The cache lifetime should be short
+    // just to remove the annoying slowness when
+    // typing text or moving cursor around when the
+    // net link is slow.
+
+    // Define the properties cache element
+    class PropertyNames
+    {
+        /// target time when this element becomes stale
+        sal_uInt32 m_nStaleTime;
+        OUString    m_sURL;
+        // the property name list received from WebDAV server
+        std::vector< DAVResourceInfo > m_aPropertiesNames;
+
+    public:
+        PropertyNames();
+        explicit PropertyNames( OUString aURL );
+
+        sal_uInt32 getStaleTime() const { return m_nStaleTime; };
+        void setStaleTime( const sal_uInt32 nStaleTime ) { m_nStaleTime = nStaleTime; };
+
+        OUString& getURL() { return m_sURL; };
+
+        const std::vector< DAVResourceInfo >& getPropertiesNames() { return m_aPropertiesNames; };
+        void setPropertiesNames( const std::vector< DAVResourceInfo >& aPropertiesNames ) { m_aPropertiesNames = aPropertiesNames; };
+    };
+
+    // Define the PropertyNames cache
+    // TODO: the OUString key element in std::map needs to be changed with a URI representation
+    // with a specific compare (std::less) implementation, this last one implementing
+    // as suggested in <https://tools.ietf.org/html/rfc3986#section-6>.
+    // To find by URI and not by string equality.
+    typedef std::map< OUString, PropertyNames,
+                      std::less< OUString > >PropNameCache;
+
+    class PropertyNamesCache
+    {
+        PropNameCache       m_aTheCache;
+        std::mutex          m_aMutex;
+
+    public:
+        PropertyNamesCache();
+        ~PropertyNamesCache();
+
+        bool getCachedPropertyNames( const OUString& URL, PropertyNames& rCacheElement );
+        void removeCachedPropertyNames( const OUString& URL );
+        void addCachePropertyNames( PropertyNames& rCacheElement, const sal_uInt32 nLifeTime );
+    };
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */