The rcrd class extends vctr. A rcrd is composed of 1 or more fields, which must be vectors of the same length. Is designed specifically for classes that can naturally be decomposed into multiple vectors of the same length, like POSIXlt, but where the organisation should be considered an implementation detail invisible to the user (unlike a data.frame).
new_rcrd(fields, ..., class = character())A list. It must possess the following properties:
no attributes (apart from names)
syntactic names
length 1 or greater
elements are vectors
elements have equal length
Additional attributes
Name of subclass.