1  Ext_File_Specs
   Extended File Specifications is a feature of OpenVMS Alpha
   Version 7.2 and later that allows the use of Windows-style 
   file specifications.

   Extended File Specifications consists of two major components:

   o  An optional volume structure, ODS-5, which provides
      support for file names that are longer and have a greater
      range of legal characters than in previous versions of OpenVMS

   o  Support for deep directories

   Full Extended File Specifications functionality is available only
   on OpenVMS Version 7.2 (and later) on Alpha. For a description of
   Extended File Specifications functionality, see the OpenVMS Guide
   to Extended File Specifications. The following topic lists the
   Extended File Specifications functionality available on a VAX
   system.
 

2  VAX_and_ODS-5
   Current ODS-2 volume and file management functions remain the
   same on both VAX and Alpha Version 7.2 (and later) systems;
   however, extended file naming and parsing are not available on
   VAX systems.

   Limited Capabilities on VAX Systems   
   In mixed-architecture OpenVMS Version 7.2 and later clusters,
   OpenVMS Version 7.2 and later VAX systems are limited to the
   following Extended File Specifications functionality:

   o  Ability to mount an ODS-5 volume

   o  Ability to write and manage ODS-2-compliant files on an ODS-5
      volume

   o  See pseudonames (\pISO_LATIN\.??? or \pUNICODE\.???) when
      accessing ODS-5 file specifications


   BACKUP Limitations
   From a VAX system, users cannot successfully create or restore
   an ODS-5 image saveset. However, these users can successfully
   restore ODS-2-compliant file names from an ODS-5 saveset.