'vCloud virtual data centers (vDCs).
:return: list of vDC objects
:rtype: ``list`` of :class:`Vdc`'

@property
def vdcs(self):

    if (not self._vdcs):
        self.connection.check_org()
        res = self.connection.request(self.org)
        self._vdcs = [self._to_vdc(self.connection.request(get_url_path(i.get('href'))).object) for i in res.object.findall(fixxpath(res.object, 'Link')) if (i.get('type') == 'application/vnd.vmware.vcloud.vdc+xml')]
    return self._vdcs
