Data selection interface. Callable object that indicates the data to be returned to the user.
Examples
>>> interface.select('/projects/myproj/subjects').get()
>>> columns = ['xnat:subjectData/PROJECT',
'xnat:subjectData/SUBJECT_ID'
]
>>> criteria = [('xnat:subjectData/SUBJECT_ID', 'LIKE', '*'),
'AND'
]
>>> interface.select('xnat:subjectData', columns
).where(criteria)