def __init__(self, uri, encoding="utf-8", mapToBE={}, mapFromBE=None):
"""Initialises a new XML repo parser. mapToBE should be a dictionary mapping the source
XML element tags to BE element names if necessary. Current BE bug
fields:
bug: XMLIssue
"""
if mapFromBE is None: mapFromBE={v:k for k, v in mapToBE.iteritems()}
ParserBase.__init__(self, uri)
self.__mapToBE=mapToBE
self.__mapFromBE=mapFromBE
self.source=None
self.bugs={}
# Save creating an XMLSchema per instance by poking this into the derived class as a static variable
if self.xml_schema is None:
self.__class__.xml_schema=etree.XMLSchema(file=self._schemapath())
