Unclarities in specification

[padix-key]

While implementing a BinaryCIF file interface and I found some parts of the specification ambiguous:

• What are the integer values a mask can hold and how do they map to the cif values (. and ?)
• Is the final offset in a String Arraythe exclusive stop or a start index itself?
• When encoding using Interval Quantization, are the values assigned to the closest step or to the next lower/higher step?
• Into which data type does Delta encode?
• How are the data types mapped to integers?

[epeisach]

My reading of the code is that
ciftools-python 0 = data, 1 = ., 2 = ?

Molstar/src/mol-data/db/column.ts: 0 = present, 1= ., 2 = ?

Also - lack of mask should be None -- not {}

[padix-key]

Thanks. I my opinion such details should be part of the specification itself.

[dsehnal]

Sorry for the late reply. You are right, this should be mentioned in the specification -- I will add it.