let xpath = Xml.xpath_eval_expression xpathctx "/domain/devices/disk[@device=\"disk\"]/target/@bus" in
let nr_nodes = Xml.xpathobj_nr_nodes xpath in
assert (nr_nodes = 1);
let xpath = Xml.xpath_eval_expression xpathctx "/domain/devices/disk[@device=\"disk\"]/target/@bus" in
let nr_nodes = Xml.xpathobj_nr_nodes xpath in
assert (nr_nodes = 1);