from lxml.includes cimport tree from lxml.includes.tree cimport xmlDoc, xmlDtd cdef extern from "libxml/valid.h": ctypedef struct xmlValidCtxt cdef xmlValidCtxt* xmlNewValidCtxt() nogil cdef void xmlFreeValidCtxt(xmlValidCtxt* cur) nogil cdef int xmlValidateDtd(xmlValidCtxt* ctxt, xmlDoc* doc, xmlDtd* dtd) nogil