def get_fields(thefile):
"""Parse a SOS GML file and extract the field data."""
doc = Parser(file=thefile, namespace="http://www.opengis.net/swe/1.0.1")
om_result = doc.tag('member/Observation/result', doc.get_ns('om'))
fields = doc.elem_tags(
om_result,
'DataArray/elementType/DataRecord/field')
return extract_field_data(doc, fields)
