Declare the entity to be (or to contain) string (UTF-8 encoded) values. The length (in bytes) of a string scalar (Scalar or Param) must not exceed 1,000,000 bytes. The length of a string in a container (Index, Series, or DataFrame) must not exceed 250,000 characters If not specified, the default value is "".

Example of declaring a scalar entity to be a string.

>>> my_string: xi.Scalar(dtype=xi.string)
... my_string: xi.Scalar("Hello World!")		

Scalar, Param, Index, Series, Column