xmlUnsetProp      683 lib/common/xml.c         xmlUnsetProp(xml, tmp->name);
xmlUnsetProp     3897 lib/common/xml.c         xmlUnsetProp(obj, (const xmlChar *)name);
xmlUnsetProp     4118 lib/common/xml.c                 xmlUnsetProp(new, prop->name); /* Remove - change not allowed */
xmlUnsetProp     4653 lib/common/xml.c             xmlUnsetProp(target, (const xmlChar *)p_name);