Uses an XQuery language expression to query an XML document.

<xquery>
    [<xq-param name="xquery_param_name" [type="xquery_param_type"]>
        body as xquery parameter value
    </xq-param>] *
    <xq-expression>
        body as xquery language construct
    </xq-expression>
</xquery>

Name	Required	Default	Description
name	yes		Name of XQuery parameter
type	no	node()	Type of XQuery parameter - one of the values: node(), integer, long, float, double, boolean, string, node()*, integer*, long*, float*, double*, boolean*, string*.

It is allowed to optionally specify multiple external parameters for the query. In most cases at least one, containing XML document is needed. For every specified xquery parameter the declaration inside the xq-expression in the form: is required in order to match the name and type of proceeded parameter. Valid parameter types supported by Web-Harvest are: node(), integer, long, float, double, boolean, string and analog sequence types: node()*, integer*, long*, float*, double*, boolean*, string*. If not specified, default XQuery parameter is node().

<xquery>
    <xq-param name="doc">
        <html-to-xml>
            <http url="${sys.fullUrl(startUrl, articleUrl)}"/>
        </html-to-xml>
    </xq-param>
    <xq-expression><![CDATA[
        declare variable $doc as node() external;

        let $author := data($doc//div[@class="byline"])
        let $title := data($doc//h1)
        let $text := data($doc//div[@id="articleBody"])
            return
                <article>
                    <title>{$title}</title>
                    <author>{$author}</author>
                    <text>{$text}</text>
                </article>
    ]]></xq-expression>
</xquery>