| Annotated-class {S4Vectors} | R Documentation | 
The virtual class Annotated is used to standardize the
storage of metadata with a subclass.
The Annotated class supports the storage of global metadata in a
subclass. This is done through the metadata slot that stores a list
object.
In the following code snippets, x is an Annotated object.
metadata(x), metadata(x) <- value: Get or set the list
holding arbitrary R objects as annotations. May be, and often is, empty.
P. Aboyoun
The Vector class, which extends Annotated directly.
showClass("Annotated")  # shows (some of) the known subclasses
## If the IRanges package was not already loaded, this will show
## more subclasses:
library(IRanges)
showClass("Annotated")