from dataclasses import dataclass

# Data class that defines a Special Interest Group "info" or reference. As well as the basic reference ID we include a
# name and a lookup URL.
@dataclass
class SIGRef:
    # Reference ID, e.g. "GB-0001".
    id: str
    # SIG that this reference is in, e.g. "POTA".
    sig: str
    # Name of the reference, e.g. "Null Country Park", if known.
    name: str = None
    # URL to look up more information about the reference, if known.
    url: str = None
    # Latitude of the reference, if known.
    latitude: float = None
    # Longitude of the reference, if known.
    longitude: float = None
    # Maidenhead grid reference of the reference, if known.
    grid: str = None