* Datetime format. This format allows you to omit the time portion, if
     * desired, and use YYYY-MM-DD.
     *
     * Note that this tag is separate from the If-Modified-Since (304) header
     * the server can return, and search engines may use the information from
     * both sources differently.
     */
    private String lastmod;

    /**

                logger.debug("Failed to retrieval a cache.", e);
            }
            return new XPathAPI();
        }
    }

    /**
     * Returns the header for the result data.
     * @return The result data header.
     */
    protected String getResultDataHeader() {
        // TODO support other type
        return "<?xml version=\"1.0\"?>\n<doc>\n";
    }

    /**

                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            }
        });

        Thread reader = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    statusSetLatch.countDown();

</tr>
</tbody>
</table> </td>
</tr>
<tr>
<td align="center" style="padding:0;margin:0;line-height:1px;font-size:1px;">
<!--///////////////////header///////////////////////////-->
<table class="collapse" id="header" align="center" width="500" style="width:500px;background-color:#ffffff;padding:0;margin:0;line-height:1px;font-size:1px;" bgcolor="#ffffff" cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr>

    /**
     * Constructs a new HtmlTransformer.
     */
    public HtmlTransformer() {
        // Default constructor
    }

    /** Header name for location redirects. */
    protected static final String LOCATION_HEADER = "Location";

    /** The crawler container for dependency injection. */
    @Resource
    protected CrawlerContainer crawlerContainer;