#******************************************************************************
# Copyright 1996-2014 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#******************************************************************************
#------------------------------------------------------------------------------
#
#  NSSDC/CDF					      CDFconvert online help.
#
#  Version 1.1c, 21-Nov-97, Hughes STX.
#
#  Modification history:
#
#   V1.0	  ?, J Love	Original version.
#   V1.1  23-Sep-96, J Love	CDF V2.6.
#   V1.1a  7-Jan-97, J Love	Fixed cache qualifier.
#   V1.1b 21-Feb-97, J Love	Removed RICE.
#   V1.1c 21-Nov-97, J Love	Windows NT/95.
#
#------------------------------------------------------------------------------
#ifos mac win
CDFconvert is used to convert one or more CDFs.  Conversions can be from
older releases of CDF (eg. Version 2.4 CDFs) to the current release and/or
to change the format, majority, or encoding.  The parameters/qualifiers
dialog box displayed when CDFconvert is 'executed' contains the following
controls.

Edit fields for...

  Source:              The source CDF specification.  This can be either a
                       single CDF path name or a folder/wildcard path in
                       which case all CDFs which match the specification will
                       be converted.  Wildcards are allowed in the CDF name
                       but not in the folder path.  In either case, do not
                       specify an extension.

                       At the end of this field a button labeled "Select" is
                       present.  When selected, a standard input file dialog
                       is displayed from which a single CDF may be selected.

  Destination:         The destination of the converted CDF(s).  This may be
                       a single CDF path name only if the source specification
                       is a single CDF path name.  If the folder paths are the
                       same, then a different CDF name must be specified.  If
                       more than one CDF is being converted, then this must be
                       a folder path (other than the source folder path).
                       This may also be a directory path if only one CDF is
                       being converted.  In any case, do not specify an
                       extension.

                       At the end of this field a button labeled "Select" is
                       present.  When selected, a standard output file dialog
                       is displayed in which a single CDF may be specified.

  Skeleton:            The path name of a skeleton CDF to be used during the
                       conversions (do not enter an extension).  Specifying a
                       skeleton CDF is optional.  The skeleton CDF is used in
                       the following cases...

                         1. If a format for the destination CDF(s) was not
                            specified, then the format of the skeleton CDF
                            will be used.

                         2. If a majority for the destination CDF(s) was not
                            specified, then the majority of the skeleton CDF
                            will be used.

                         3. If an encoding for the destination CDF(s) was not
                            specified, then the encoding of the skeleton CDF
                            will be used.

  Cache sizes:         The number of 512-byte buffers to be used for the
                       CDF's dotCDF file, staging file, and compression
                       scratch file.  If this field is left blank, default
                       cache sizes chosen by the CDF library are used.
                       The cache sizes are specified with a comma-separated
                       list of <number><type> pairs where <number> is the
                       number of cache buffers and <type> is the type of
                       file.  The file <type>'s are as follows: 'd' for the
                       dotCDF file, 's' for the staging file, and 'c' for
                       the compression scratch file.  For example, '200d,100s'
                       specifies 200 cache buffers for the dotCDF file and
                       100 cache buffers for the staging file.  The dotCDF
                       file cache size can also be specified without the 'd'
                       <type> for compatibility with older CDF releases (eg.
                       '200,100s').  Note that not all of the file types must
                       be specified.  Those not specified will receive a
                       default cache size.

  Compression:         Specifies the types of compression to be used for the
                       CDF and/or variables.  <types> consists of a comma-
                       separated list of the following...

                         cdf:<cT>                    CDF's compression.
                         vars:<cT>                   Compression for all
                                                     variables.
                         vars:<cT>:<bF>              Compression for all
                                                     variables with a blocking
                                                     factor specified.
                         vars:<cT>:<bF>:<r%>         Compression for all
                                                     variables with a blocking
                                                     factor and reserve
                                                     percentage specified.
                         var:<name>:<cT>             Compression for one
                                                     particular variable.
                         var:<name>:<cT>:<bF>        Compression for one
                                                     particular variable with
                                                     a blocking factor
                                                     specified.
                         var:<name>:<cT>:<bF>:<r%>   Compression for one
                                                     particular variable with
                                                     a blocking factor and
                                                     reserve percentage
                                                     specified.

                       Where <cT> is one of the following: 'none', 'rle.0',
                       'huff.0', 'ahuff.0', or 'gzip.<level>'; <bF> is a
                       blocking factor; <r%> is a reserve percentage; and
                       <name> is a delimited, case-sensitive variable name
                       with the following syntax:

                             <delim><char1><char2>...<charN><delim>

                       For the 'gzip' compression, <level> must be in the
                       range from '1' (fastest compression) to '9' (best
                       compression). '6' is the better for performance and
                       compression rate.

                       For compressions not specified, the compression in
                       the source CDF will be used.  Specifying a variable
                       compression using 'var:' overrides a compression
                       specified with 'vars:'. While having 'var:' for 
                       multiple variables, use "'" as the delimiter and ","
                       as the variable separator. 

  Sparseness:          Specifies the types of sparseness to be used for the
                       variables.  <types> consists of a comma-separated list
                       of the following...

                         vars:<sT>              Sparseness for all variables.
                         var:<name>:<sT>        Sparseness for one particular
                                                variable.

                       Where <sT> is one of the following: 'srecords.no',
                       'srecords.pad', or 'srecords.prev'; and <name> is a
                       delimited, case-sensitive variable name with the
                       following syntax:

                            <delim><char1><char2>...<charN><delim>

                       For sparsenesses not specified the sparseness in
                       the source CDF will be used.  Specifying a variable
                       sparseness using 'var:' overrides a sparseness
                       specified with 'vars:'.

                       Note: For non-record variant (NVR) variables, since
                       they only have a single record, if the record size
                       is too small (less than 1K), the compression will
                       not be turned on, even specified so. 

Check boxes for...

  Log progress:        Whether or not progress messages are displayed.

  Display percentages: Whether or not the percentage of a variable's values
                       converted is displayed during the conversion of that
                       variable.  Progress message logging must also be
                       enabled.

  Delete existing:     Whether or not an existing CDF is deleted if a new
                       CDF with the same name is to be created.

  Page output:         Whether or not the output is displayed one page (screen)
                       at a time.

  Report info's:       Whether or not informational status codes from the CDF
                       library should be reported.

  Report warnings:     Whether or not warning status codes from the CDF library
                       should be reported.

  Report errors:       Whether or not error status codes from the CDF library
                       should be reported.

  -0.0 to 0.0:         Whether or not -0.0 is converted to 0.0 by the CDF
                       library when read from a CDF.

  Display statistics:  Whether or not caching statistics are displayed at the
                       end of each comparison of two CDFs.

Radio buttons for...

  Format:              The format of the destination CDF(s).
                            Source...the same as the source CDF (unless a
                                     skeleton CDF was specified).
                            Single...single-file.
                            Multi....multi-file.

  Majority:            The variable majority of the destination CDF(s).
                            Source...the same as the source CDF (unless a
                                     skeleton CDF was specified).
                            Row......row-major.
                            Column...column-major.

  Encoding:            The encoding of the destination CDF(s).
                            Source.......the same as the source CDF (unless a
                                         skeleton CDF was specified).
                            Host.........the host machine's encoding (ie.,
                                         INTEL PC encoding).
                            Network......network encoding.
                            Sun..........Sun encoding.
                            VAX..........VAX encoding.
                            SGi..........SGi encoding.
                            HP...........HP encoding.
                            PC...........INTEL PC encoding.
                            IBM RS.......IBM RS encoding
                            PPC..........Macintosh/PPC encoding.
                            DECstation...DECstation encoding.
                            NeXT.........NeXT encoding.
                            Alpha/VMSd...DEC Alpha/VMS D_FLOAT encoding.
                            Alpha/VMSg...DEC Alpha/VMS G_FLOAT encoding.
                            Alpha/VMSi...DEC Alpha/VMS IEEE encoding.
                            Alpha/OSF1...DEC Alpha/OSF1 encoding.

  zMode:               The zMode to be used for the source CDF(s).
                            0...zMode is disabled.
                            1...zMode/1 should be used.  The dimension
                                variances of the rVariables will be preserved.
                            2...zMode/2 should be used.  The dimensions of
                                rVariables having a variance of NOVARY (false)
                                are hidden.

Buttons for...

  Enter                Causes CDFconvert to convert CDF(s) based on the
                       parameters/qualifiers specified.

  Help                 Causes this online help to be displayed.

#ifos mac
  Quit                 Causes CDFconvert to terminate.  (No CDFs are
                       converted.)  This button is only present the
                       first time the parameters/qualifiers dialog box
                       is displayed.

#endos
  Cancel               Causes the parameters/qualifiers dialog box to
                       be closed.  (No CDFs are converted.)
#ifos mac
                       This button is only present after the first time the
                       parameters/qualifiers dialog box is displayed.
#endos
#else
#ifos vms
Usage:       $ CDFCONVERT [/SKELETON=<skt-cdf-path>] [/[NO]LOG]
                          [/[NO]PERCENT] [/REPORT=(<types>)] [/[NO]PAGE]
                          [/CACHE=(<sizes>)] [/[NO]STATISTICS] [/ABOUT]
                          <src-cdf-spec>
                             [/ZMODE=<mode>] [/[NO]NEG2POSFP0]
                          <dst-cdf-spec>
                             [/SINGLE | /MULTI] [/ROW | /COLUMN]
                             [/HOST | /NETWORK | /ENCODING=<encoding>]
                             [/COMPRESSION=(<types>)] [/[NO]DELETE]
                             [/SPARSENESS=(<types>)] [/BACKWARD] [/SORT=<var>]
                             [/CHECKSUM=<method>] [/BLOCKINGFACTOR=<bf>]
                             [/EPOCH2TT2000 | /TT20002EPOCH | /TT20002DEPOCH]
                             [/ADJUSTTT2000=<date>] [/COMPRESSNONEPOCH]
                             [/LEAPSECONDLASTUPDATED=<date>] [/REMOVEDIM]
                             [/PADTOFILLED]]
#endos
#ifos unix
Usage:       % cdfconvert [-skeleton <skt-cdf-path>] [-[no]log]
                          [-[no]percent] [-report "<types>"] [-[no]page]
                          [-cache "<sizes>"] [-[no]statistics] [-about]
                          <src-cdf-spec>
                             [-zmode <mode>] [-[no]neg2posfp0]
                          <dst-cdf-spec>
                             [-single | -multi] [-row | -column]
                             [-host | -network | -encoding <encoding>]
                             [-compression <types>] [-[no]delete]
                             [-sparseness <types>] [-backward] [-sort <var>]
                             [-checksum <method>] [-blockingfactor <bf>]
                             [-epoch2tt2000 | -tt20002epoch | -tt20002depoch]
                             [-adjusttt2000 <date>] [-compressnonepoch]
                             [-leapsecondlastupdated <date>] [-removedim]
                             [-padtofilled]
#endos
#ifos dos
Usage:       > cdfconvert [-skeleton <skt-cdf-path>] [-[no]log]
                          [-[no]percent] [-report "<types>"] [-[no]page]
                          [-cache "<sizes>"] [-[no]statistics] [-about]
                          <src-cdf-spec>
                             [-zmode <mode>] [-[no]neg2posfp0]
                          <dst-cdf-spec>
                             [-single | -multi] [-row | -column]
                             [-host | -network | -encoding <encoding>]
                             [-compression <types>] [-[no]delete]
                             [-sparseness <types>] [-backward] [-sort <var>]
                             [-checksum <method>] [-blockingfactor <bf>]
                             [-epoch2tt2000 | -tt20002epoch | -tt20002depoch]
                             [-adjusttt2000 <date>] [-compressnonepoch]
                             [-leapsecondlastupdated <date>] [-removedim]
                             [-padtofilled]
#endos

Purpose:       CDFconvert is used to convert one or more CDFs.  Conversions
               can be from older releases of CDF (eg. Version 2.4 CDFs) to
               the current release and/or to change the format, majority, 
               encoding, and others.

Parameter(s):  <src-cdf-spec>
                  The source CDF(s).  This can be either a single CDF
                  path name or a directory/wildcard path in which case all
                  CDFs which match the specification will be converted.
                  Wildcards are allowed in the CDF name but not in the
                  directory path.  In either case, do not specify an
                  extension.

               <dst-cdf-spec>
                  The destination of the converted CDF(s).  This may be
                  a single CDF path name only if <src-cdf-spec> is a
                  single CDF path name, or the directory path in which the
                  output file (with the same name as the source) will be
                  placed. If the source and output file is the same, then
                  then "-delete" option needs to be specified so the source
                  file will be replaced by the converted file after the
                  conversion. If more than one CDF is being converted, this
                  must be a directory path (other than the source directory
                  path).  This may also be a directory path if only one CDF
                  is being converted.  In any case, do not specify an
                  extension.

#ifos vms
Qualifier(s):  /SKELETON=<skt-cdf-path>
#else
Qualifier(s):  -skeleton <skt-cdf-path>
#endos
                  The path name of a skeleton CDF to be used during the
                  conversions (do not enter an extension).  The skeleton
                  CDF is used in the following cases.

                    1. If a format for the destination CDF(s) was not
                       specified, then the format of the skeleton CDF will
                       be used.

                    2. If a majority for the destination CDF(s) was not
                       specified, then the majority of the skeleton CDF will
                       be used.

                    3. If an encoding for the destination CDF(s) was not
                       specified, then the encoding of the skeleton CDF will
                       be used.

                  Specifying a skeleton CDF is optional.

#ifos vms
               /[NO]LOG
#else
               -[no]log
#endos
                  Specifies whether or not messages are displayed
                  indicating the progress of a conversion.

#ifos vms
               /[NO]PERCENT
#else
               -[no]percent
#endos
                  Specifies whether or not the percentage of a variable
                  converted is displayed during the conversion of that
                  variable.  Message logging must also be enabled.

#ifos vms
               /[NO]PAGE
#else
               -[no]page
#endos
                  Specifies whether or not the output is displayed a page
                  at a time.

#ifos vms
               /ZMODE=<mode>
#else
               -zmode <mode>
#endos
                  Specifies which zMode should be used with the source CDF(s).
                  <mode> may be one of the following...

                     0       Indicates that zMode is disabled.
                     1       Indicates that zMode/1 should be used (the
                             dimension variances of rVariables will be
                             preserved).
                     2       Indicates that zMode/2 should be used (the
                             dimensions of rVariables having a variance
                             of NOVARY, as false, are removed after
                             converting to zVariables).

                  Note that using zMode/1 or zMode/2 on a source CDF which
                  contains rVariables will produce a destination CDF
                  containing only zVariables.  With zMode/2, the dimension
                  for rVariables in the converted CDF will be set to zero (0).
                  The zMode "view" provided for the source CDF is written to
                  the destination CDF during the conversion.

#ifos vms
               /SINGLE | /MULTI
#else
               -single | -multi
#endos
                  The format of the destination CDF(s).  This overrides the
                  format of the skeleton CDF (if specified).  If neither
                  this qualifier nor a skeleton CDF is specified, then the
                  format of the destination CDF(s) will be the same as that
                  of the source CDF(s).

#ifos vms
               /ROW | /COLUMN
#else
               -row | -column
#endos
                  The majority of the destination CDF(s).  This overrides
                  the majority of the skeleton CDF (if specified).  If
                  neither this qualifier nor a skeleton CDF is specified,
                  then the majority of the destination CDF(s) will be the
                  same as that of the source CDF(s). Once the majority is
                  changed, all multi-dimensional variables' data are
                  transposed. Their dimensional sizes remain the same.

#ifos vms
               /HOST | /NETWORK | /ENCODING=<encoding>
#else
               -host | -network | -encoding <encoding>
#endos
                  The encoding of the destination CDF(s).  Specify only one
                  of these qualifiers.  This overrides the encoding of the
                  skeleton CDF (if specified).  If neither this qualifier nor
                  a skeleton CDF is specified, then the encoding of a
                  destination CDF will be the same as that of the source
#ifos vms
                  CDF.  The possible values of <encoding> are 'HOST',
                  'NETWORK', 'SUN', 'VAX', 'DECSTATION', 'SGi', 'IBMPC',
                  'IBMRS', 'PPC', 'HP', 'NeXT', 'ALPHAOSF1, 'ALPHAVMSd',
                  'ALPHAVMSg', 'ALPHAVMSi', 'ARM_LITTLE', 'ARM_BIG',
                  'IA64VMSi', 'IA64VMSd' and 'IA64VMSg'.

                  Note that /HOST and /NETWORK are no longer necessary
                  (but are supported for compatibility with previous CDF
                  distributions).
#else
                  CDF.  The possible values of <encoding> are 'host',
                  'network', 'sun', 'vax', 'decstation', 'sgi', 'ibmpc',
                  'ibmrs', 'ppc', 'hp', 'next', 'alphaosf1', 'alphavmsd',
                  'alphavmsg', 'alphavmsi', 'arm_little', 'arm_big',
                  'ia64vmsi', 'ia64vmsd' and 'ia64vmsg'.

                  Note that '-host' and '-network' are no longer necessary
                  (but are  supported for compatibility with previous CDF
                  distributions).
#endos

#ifos vms
               /[NO]DELETE
#else
               -[no]delete
#endos
                  Specifies whether or not the destination CDF is to be
                  deleted and replaced if it already exists. nodelete is
                  the default.

#ifos vms
               /[NO]NEG2POSFP0
#else
               -[no]neg2posfp0
#endos
                  Specifies whether or not -0.0 is converted to 0.0 by the
                  CDF library when read from or written to a CDF.  -0.0 is
                  an illegal floating point value on VAXes and DEC Alphas
                  running OpenVMS.

#ifos vms
               /REPORT=(<types>)
#else
               -report "<types>"
#endos
                  Specifies the types of return status codes from the CDF
                  library which should be reported/displayed.  <types> is
                  a comma-separated list of zero or more of the following
                  symbols: 'errors', 'warnings', or 'informationals'.  Note
                  these symbols can be truncated (eg. 'e', 'w', and 'i').

#ifos vms
               /CACHE=(<sizes>)
#else
               -cache "<sizes>"
#endos
                  The number of 512-byte buffers to be used for the CDF's
                  dotCDF file, staging file, and compression scratch file.
                  If this qualifier is absent, default cache sizes chosen by
                  the CDF library are used.  The cache sizes are specified
                  with a comma-separated list of <number><type> pairs where
                  <number> is the number of cache buffers and <type> is the
                  type of file.  The file <type>'s are as follows: 'd' for
                  the dotCDF file, 's' for the staging file, and 'c' for the
                  compression scratch file.  For example, '200d,100s'
                  specifies 200 cache buffers for the dotCDF file and 100
                  cache buffers for the staging file.  The dotCDF file cache
                  size can also be specified without the 'd' <type> for
                  compatibility with older CDF releases (eg. '200,100s').
                  Note that not all of the file types must be specified.
                  Those not specified will receive a default cache size.

#ifos vms
               /[NO]STATISTICS
#else
               -[no]statistics
#endos
                  Specifies whether or not caching statistics are displayed
                  at the end of each conversion.

#ifos vms
               /COMPRESSION=(<types>)
#else
               -compression "<types>"
#endos
                  Specifies the types of compression to be used for the CDF
                  and/or variables.  The <types> option consists of a comma-
                  separated list of the following...

                      cdf:<cT>                     CDF's compression.
                      vars:<cT>                    Compression for all
                                                   variables.
                      vars:<cT>:<bF>               Compression for all
                                                   variables with a blocking
                                                   factor specified.
                      vars:<cT>:<bF>:<r%>          Compression for all
                                                   variables with a blocking
                                                   factor and reserve
                                                   percentage specified.
                      var:<name>:<cT>              Compression for one
                                                   particular variable.
                      var:<name>:<cT>:<bF>         Compression for one
                                                   particular variable with
                                                   a blocking factor specified.
                      var:<name>:<cT>:<bF>:<r%>    Compression for one
                                                   particular variable with
                                                   a blocking factor and
                                                   reserve percentage
                                                   specified.

                  Where <cT> is one of the following: 'none', 'rle.0',
                  'huff.0', 'ahuff.0', or 'gzip.<level>'; <bF> is a blocking
                  factor; <r%> is a reserve percentage; and <name> is a
                  delimited, case-sensitive variable name with the following
                  syntax:

                         <delim><char1><char2>...<charN><delim>

                  In general, do not use single or double quote marks as
                  delimiters.  But on VMS systems the entire delimited
                  variable name must be enclosed in double quote marks (to
                  preserve case-sensitivity).

                  For the 'gzip' compression, <level> must be in the range
                  from '1' (fastest compression) to '9' (best compression).

                  For compressions not specified the compression in the source
                  CDF will be used.  Specifying a variable compression using
                  'var:' overrides a compression specified with 'vars:'.

                  Note: Non-record variant variables will not be compressed if
                        their total data sizes are less than 1K. 

#ifos vms
               /SPARSENESS=(<types>)
#else
               -sparseness "<types>"
#endos
                  Specifies the types of sparseness to be used for the
                  variables.  The <types> option consists of a comma-
                  separated list of the following...

                      vars:<sT>        Sparseness for all variables.
                      var:<name>:<sT>  Sparseness for one particular
                                       variable.

                  Where <sT> is one of the following: 'srecords.no',
                  'srecords.pad', or 'srecords.prev'; and <name> is a
                  delimited, case-sensitive variable name with the
                  following syntax:

                          <delim><char1><char2>...<charN><delim>

                  In general, do not use single or double quote marks as
                  delimiters.  But on VMS systems the entire delimited
                  variable name must be enclosed in double quote marks (to
                  preserve case-sensitivity).

                  For sparsenesses not specified the sparseness in the source
                  CDF will be used.  Specifying a variable sparseness using
                  'var:' overrides a sparseness specified with 'vars:'.

#ifos vms
               /BACKWARD
#else
               -backward
#endos
                  By default, the converted file will be of the same version
                  as the library it runs on, unless the environment variable
                  CDF_FILEBACKWARD (or CDF$FILEBACKWARD on OpenVMS) is set to
                  true. In that case, a backward V2.7 version file is
                  created.  This option serves the same propose to create a
                  backward version file if that environment variable is not
                  set. If this option is on, make sure that the source file
                  is not over 2G file size limit, either compressed or
                  uncompressed.

#ifos vms
               /CHECKSUM=<method>
#else
               -checksum <method>
#endos
                  By default, whether to set the checksum mode on the
                  converted file is based on the environment variable
                  CDF_CHECKSUM (or CDF$CHECKSUM on OpenVMS) or the source
                  file. If the environment variable is set to a valid method,
                  the checksum mode for the converted file will also be set.
                  If the environment variable is not set, then the source 
                  file's checksum mode is used for the converted file.
                  Alternatively, to force the checksum mode to be (or not to
                  be) set, this option can be used.  If it is specified, then
                  it will overwrite the environment variable and that in the
                  source file. Currently, the possible values for the
                  checksum option are 'none', 'md5' or 'source'. This option
                  becomes invalid if the backward option is also specified
                  as checksum does not apply to files prior to CDF V3.2.

#ifos vms
               /SORT=<var>
#else
               -sort <var>
#endos
                  This option will sort the CDF, based on the given variable.
                  For time-sequenced CDFs that are out of chronological order,
                  this option will use "var" as the base for sorting. All
                  other record-variant variables that have no sparse records
                  and have the same number of records (samplings) will have
                  their records rearranged accordingly.

#ifos vms
               /BLOCKINGFACTOR=<bf>
#else
               -blockingfactor <bf>
#endos
                  This option will provide an easier way of setting a blocking
                  factor for each of the compressed variable. <bf> can be: 
                  1. A string of "optimal", meaning to use the computed 
                     blocking factor that is based on the variable's record
                     size and available compressed caches. This approach 
                     will increase the blocking factor from the default
                     setup, which potentially will provide a smaller file with
                     a better data access.
                  2. A string of "max", meaning a single block is to be
                     used to hold a variable's total data. This option can
                     potentially make the smallest file. However, tests show
                     it might not be the most efficient for data access.
                  3. A number. If a positive value is given, it is the blocking
                     factor: the number of variable records in a compressed
                     block. Alternatively, a negative value can also be
                     provided. In this case, it is the maximum byte count for
                     a compressed block. The actual blocking factor, the number
                     of records in a compressed block, is computed, based on
                     the variable's record size. Given a higher value will
                     require more dynamic space, but can reduce the file size
                     and potentially speed up the overall data access. If the
                     entered blocking factor, directly or non-directly, is 
                     bigger than the actual written records, the number of
                     records is used.
                  The blocking factor field, if provided, in the "compression"
                  option will overwrite this value.

#ifos vms
               /COMPRESSNONEPOCH
#else
               -compressnonepoch
#endos
                  This option will compress all non-CDF epoch type variables,
                  i.e., not CDF_EPOCH, CDF_EPOCH16 and CDF_TIME_TT2000 types,
                  and uncompress those CDF epoch type variables. If the 
                  variables in the original file are already compressed, then
                  their compression method/level will be preserved. Otherwise,
                  the compressed variables will be in GZIP.6 compression. This
                  option provides an easier form for the compression option.
                  Variables of non-record varying will not be compressed if
                  their sizes are less than 1K. This option will overwrite 
                  any variable specific parameters in the -compression option. 
                  Once this option is used, the CDF-level compression will be
                  turned off, no matter what the source file may have.

#ifos vms
               /EPOCH2TT2000 | /TT20002EPOCH | /TT20002DEPOCH
#else
               -epoch2tt2000 | -tt20002epoch | -tt20002depoch
#endos
                  Specifies whether the epoch data needs to be converted in
                  to a different form: from CDF_EPOCH/CDF_EPOCH16 to
                  CDF_TIME_TT2000 (epoch2tt2000), from CDF_TIME_TT2000 to
                  CDF_EPOCH (tt20002epoch), or CDF_TIME_TT2000 to
                  CDF_EPOCH16 (tt20002depoch). If an epoch of CDF_TIME_TT2000
                  falls on a leap second, it will be converted to the zero (0)
                  second of the next day as CDF_EPOCH/EPOCH16 does not have
                  leap second. No conversion is the default. 

                  Note: If the EPOCH/EPOCH16 date is outside of the range of
                  for TT2000, e.g., 0001-01-01T12:34:56.123 (a valid
                  CDF_EPOCH), a dummy value is assigned which is presented as
                  9999-12-31T23:59:59.999999999.

#ifos vms
               /LEAPSECONDLASTUPDATED=<date>
#else
               -leapsecondlastupdated date
#endos
                  Respecifies the leap second last updated date stored in the
                  head field in a CDF. The date, in YYYYMMDD form, has to be
                  a valid entry in the currently used leap second table (LST),
                  or a value of zero (0). Zero value indicates the CDF was 
                  built without using a leap second table. Normally, this
                  option is used to modify the field for older CDFs that have
                  not had this field set. Without this option, the converted
                  file will be filled with the latest leap second date from
                  the LST.  

#ifos vms
               /REMOVEDIM
#else
               -removedim
#endos
                  Specifies whether to try to remove a dimension(s) from a
                  zVariable if that dimension is a non-varying. However,
                  if the variable has DEPEND_x attribute entry defined for 
                  that dimension (where x is either 1, 2, ...), then its 
                  dimension(s) will not be removed. 

#ifos vms
               /PADTOFILLED
#else
               -padtofilled
#endos
                  Specifies whether to replace each variable's data from
                  its PAD value to its "FILLVAL" value. This option is 
                  relevant only if "FILLVAL" exists for a non-string type
                  variable and its "FILLVAL" data type is equivalent to its
                  variable's. Make sure that a variable's PAD value is
                  defined as a value, similar to "FILLVAL", which should not
                  be a valid data value. 

#ifos vms
               /ADJUSTTT2000=<date>
#else
               -adjusttt2000 date
#endos
                  Specifies the starting date that TT2000 data need to be
                  adjusted by adding one (1) or more second(s). This date, 
                  in YYYYMMDD, has to be a valid entry in the currently used
                  leap second table.  The CDF needs to be adjusted because it
                  was made based on an outdated leap second table. The leap
                  second last updated date stored in the head field in a CDF
                  will be adjusted as well.

#ifos vms
               /ABOUT
#else
               -about
#endos
                  Shows the library version that was used to create this tool
                  program.

#ifos vms
Example(s):    $ CDFCONVERT CDF$SMPL:TPLATE0 TEMPLATE0X/ENCODING=IBMPC
               $ CDFCONVERT/REPORT=(ERRORS) CDF$SMPL: USER_DISK:[USER.CDF]
               $ CDFCONVERT CAC_SST_BLENDED CAC_SST_BLENDEDX/SINGLE/NETWORK
               $ CDFCONVERT/SKELETON=CDF$SMPL:TPLATE3 CAC_SST_* [USER.CDF]
               $ CDFCONVERT FLUX1 FLUX2/COMPRESSION=(CDF:HUFF.0)/BACKWARD
               $ CDFCONVERT FILE1 FILE2/CHECKSUM=MD5
               $ CDFCONVERT/LOG MAG MAGX/COMPRESSION=(VAR:"^var1^":AHUFF.0:50)
#endos
#ifos unix
Example(s):    % cdfconvert ../samples/tplate0 template0x -encoding ibmpc
               % cdfconvert -report "errors" ../samples/ /disk4/user/cdf/
               % cdfconvert cac_sst_blended cac_sst_1 -single -network
               % cdfconvert -skeleton tplate3 '../cdf/cac_sst_*' ~user/cdf
               % cdfconvert flux1 flux2 -compression "cdf:huff.0" -backward
               % cdfconvert file1 file2 -checksum md5
               % cdfconvert -log mag magx -compression "var:^var1^:ahuff.0:50"
#endos
#ifos dos
Example(s):    > cdfconvert ..\samples\tplate0 tplate0x -encoding ibmpc
               > cdfconvert -report "errors" ..\samples c:\disk4\user\cdf
               > cdfconvert cac_sst cac_sst1 -single -network
               > cdfconvert -skeleton tplate3 ..\cac_sst* b:\user\cdf
               > cdfconvert flux1 flux2 -compression "cdf:huff.0" -backward
               > cdfconvert -log mag magx -compression "var:^var1^:ahuff.0:50"
#endos
#endos
