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This module contains useful functions for parsing and using XML data. For the
moment, there is only one function that can parse the data inside a processing
instruction and return a Python dictionary.




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    Utility function that parses the data contained in an XML
    processing instruction and returns a dictionary of keywords and their
    associated values (most of the time, the processing instructions contain
    data like ``keyword="value"``, if a keyword is not associated to a value,
    for example ``keyword``, it will be associated to ``None``).

    :param pi_data: data contained in an XML processing instruction.
    :type pi_data: unicode

    :returns: Dictionary of the keywords (Unicode strings) associated to
              their values (Unicode strings) as they were defined in the
              data.
    :rtype: dict
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