`.storage.FieldId`
Required. Identifies the column.
info_type
`.storage.InfoType`
A column can be tagged with a InfoType to use the relevant
public dataset as a statistical model of population, if
available. We currently support US ZIP codes, region codes,
ages and genders. To programmatically obtain the list of
supported InfoTypes, use ListInfoTypes with the
supported_by=RISK_ANALYSIS filter.
custom_tag
str
A column can be tagged with a custom tag. In
this case, the user must indicate an auxiliary
table that contains statistical information on
the possible values of this column (below).
inferred
`.empty.Empty`
If no semantic tag is indicated, we infer the
statistical model from the distribution of
values in the input data
