Breadcrumb : rdfa and microdatas

<div itemscope itemtype="http://data-vocabulary.org/Breadcrumb" xmlns:v="http://rdf.data-vocabulary.org/#">
    <span typeof="v:Breadcrumb">
        <a href="http://www.example.com/robes" rel="v:url" property="v:title" content="Robes" itemprop="url"><span itemprop="title">Robes</span></a> ›
        <span rel="v:child" itemscope itemtype="http://data-vocabulary.org/Breadcrumb" itemprop="child">
            <span typeof="v:Breadcrumb">
                <a href="http://www.example.com/robes/soiree" rel="v:url" property="v:title" content="de soirée" itemprop="url"><span itemprop="title">de soirée</span></a> ›
                <span rel="v:child" itemscope itemtype="http://data-vocabulary.org/Breadcrumb" itemprop="child">
                    <span typeof="v:Breadcrumb">
                        <a href="http://www.example.com/robes/soiree/vertes" rel="v:url" property="v:title" content="vertes" itemprop="url"><span itemprop="title">vertes</span></a> ›
                    </span>
                </span>
            </span>
        </span>
    </span>
</div>