':param featstruct: The value of the ``sem`` node in a tree from
``parse_with_bindops()``
:type featstruct: FeatStruct (with features ``core`` and ``store``)'

def __init__(self, featstruct):

    self.featstruct = featstruct
    self.readings = []
    try:
        self.core = featstruct['CORE']
        self.store = featstruct['STORE']
    except KeyError:
        print(('%s    is    not    a    Cooper    storage    structure' % featstruct))
