Y91001 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
Y87001 manifest for SAS Clinical Standards Toolkit Framework 1.6
Y88001 manifest for SAS Clinical Standards Toolkit Framework JAR File 1.6
Y89001 manifest for SAS Clinical Standards Toolkit Global Standards Library 1.6
Y90001 manifest for SAS Clinical Standards Toolkit Sample Library 1.6