VMS Help DECset, Database File  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Each record of the context database file defines a particular
  context in terms of its name, an associated context file, its
  parent context (optional), and a description (optional).

  The format of each record is:

       context-name filespec [parent-context-name] ["description"]

  The context name and context file specification fields must be
  present.  The context name should begin in the first column and
  each field should be separated by a single blank space.

  The parent context name is the name of another context defined
  in the same database file.  The description must be enclosed in
  double quotation marks.

  Note that this file is automatically generated when you save a
  database via the Environment Manager's graphical user interface.