Library /sys$common/syshlp/dtm$dw_helplib.hlb terms, collection  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  One or more tests you select to run as a set. A
  collection is a "snapshot" of its tests and the library
  at the time you create the collection.

  A collection can have prologue and epilogue files,
  filters, and variables associated with it.

  To change a collection, you must re-create it.

  You can execute a test only as part of a collection.