The type of the name of the group fields
Readonly
digitThe character set used for representing digits in the fractional index.
Readonly
groupThe fields that define the grouping context for the fractional index. This is an array of field names.
Readonly
lengthThe character set used for encoding the length of the integer part.
Optional
Readonly
typeThe type of the fractional index.
Must be "string" or undefined
for string fractional indices.
The options for the string fractional index fields.
Example
See