def clear(self):
        """Clear all data that might pertain to an individual IIIF URL.

        Does not change/reset the baseurl or API version which might be
        useful in a sequence of calls.
        """
        # API parameters
        self.identifier = None
        self.region = None
        self.size = None
        self.rotation = None
        self.quality = None
        self.format = None
        self.info = None
        # Derived data and flags
        self.region_full = False
        self.region_square = False
        self.region_pct = False
        self.region_xywh = None  # (x,y,w,h)
        self.size_full = False
        self.size_max = False  # new in 2.1
        self.size_pct = None
        self.size_bang = None
        self.size_wh = None     # (w,h)
        self.rotation_mirror = False
        self.rotation_deg = 0.0
Clear all data that might pertain to an individual IIIF URL.

        Does not change/reset the baseurl or API version which might be
        useful in a sequence of calls.