English: this field is set to <em>[pre]</em> if the resource has been accessed through <a target="_blank" href="https://developer.mozilla.org/en/Link_prefetching_FAQ">Link Prefetching</a> or similar techniques
Dutch: dit veld wordt ingesteld op <em>[pre]</em> als de gegevensbron is opgevraagd via <a target="_blank" href="https://developer.mozilla.org/en/Link_prefetching_FAQ">Link prefetching</a> of soortgelijke technieken