def parse_opf_xml (rawxml):
rawxml, encoding = xml_to_unicode(rawxml, strip_encoding_pats=True, resolve_entities=True, assume_utf8=True)
rawxml = rawxml[rawxml.find('<'):]
tree = etree.fromstring(rawxml, etree.XMLParser(recover=True))
opf = Storage()
for section in ('metadata', 'manifest', 'spine', 'guide'):
subtree = tree.find('opf:%s' % section, namespaces=NAMESPACES)
if subtree is not None:
for el in subtree.getchildren():
opf.setdefault(section, []).append((el.tag, el.attrib, el.text))
return opf
