Represents an individual domain in a domain architecture.

The locations use 0-based indexing, as most Python objects including SeqFeature do, rather than the usual biological convention starting at 1. This means the start and end attributes can be used directly as slice indexes on Seq objects.

:Parameters:

start : non-negative integer
    start of the domain on the sequence, using 0-based indexing
end : non-negative integer
    end of the domain on the sequence
confidence : float
    can be used to store e.g. E-values
id : string
    unique identifier/name