Library /sys$common/syshlp/helplib.hlb  —  VIEW
    Invokes the CDA Viewer, which has a character-cell interface for
    viewing text files and an DECwindows Motif for OpenVMS interface
    for viewing compound documents and files containing graphics,
    images, and tabular data.

                                   NOTE

       The CDA Base Services for DECwindows Motif for OpenVMS
       must be installed to use new versions of the CDA Viewer and
       CDA Base Services converters.

    Specify the input file name and format as shown below. The
    default input file format is DDIF (DIGITAL Document Interchange
    Format). DDIF is a standard format for the storage and
    interchange of compound documents, which can include text,
    graphics, and images.

    DDIF is the format in which the CDA Viewer displays all input
    files. When the CDA Viewer processes a non-DDIF file for display,
    it invokes the converter for the input file format you specify.
    The input file is converted to DDIF, and the resulting output is
    displayed.

    The CDA Viewer displays file formats supported by converters
    installed with the CDA Base Services for DECwindows Motif
    for OpenVMS: text, DDIF, and DTIF. PostScript files are no
    longer supported. VSI's CDA Converter Library provides additional
    converters that support display of other popular file formats. If
    you have the CDA Converter Library Version 2.2 or later installed
    on your system, see HELP CDA_Converters for more information.

    Format

      VIEW  [input-file]

1  –  Parameter

 input_file

    Specifies the name of the file to be viewed. If you do not
    specify an input file name, you are prompted for one. You
    cannot use the asterisk (*)  and the percent sign (%) wildcard
    characters in the file specification.

    The default input file format is DDIF, and the default file type
    is DDIF. Valid input file formats are any of those for which
    there is an input converter installed on the system.

2  –  Qualifiers

2.1    /FORMAT

       /FORMAT=fmt-name
       /FORMAT=DDIF (default)

    Specifies the format of your input file. The input formats that
    you can use with the CDA Viewer depend on the CDA converters
    installed on your system. The default input format is DDIF. Input
    formats supported by converters installed with the CDA Base
    Services for DECwindows Motif for OpenVMS and their default file
    extensions are as follows:

    Input Format   File Extension

    DDIF           .DDIF
    DTIF           .DTIF
    TEXT           .TXT

    VSI's CDA Converter Library provides additional converters that
    support display of other popular file formats. If you have the
    CDA Converter Library Version 2.2 or later installed on your
    system, see HELP CDA_Converters for more information, or contact
    your system manager for a complete list of input converters
    available on your system.

2.2    /HEIGHT

       /HEIGHT=nn

    Specifies the height of the page in number of characters. If
    you specify the /OVERRIDE_FORMAT qualifier, or if the document
    being viewed has no inherent format, this page height is used.
    On the DECwindows Motif display, the default height is 66 lines,
    which is equivalent to the default page height of 11 inches.
    On character cell displays, the page height defaults to your
    terminal's screen height. However, if you use the /OUTPUT
    qualifier, the page height depends on the page height of your
    document.

2.3    /INTERFACE

       /INTERFACE=DECWINDOWS
       /INTERFACE=CHARACTER_CELL (default)

    Specifies the type of display you are using.

2.4    /OPTIONS

       /OPTIONS=options-filename

    Specifies a text file that contains processing options applied
    to the input file while it is processed for display. The default
    file extension for an options file is .CDA$OPTIONS.

2.5    /OUTPUT

       /OUTPUT=output-filename
       /NOOUTPUT (default)

    Specifies a file that you want to receive the output instead of
    having it displayed on the screen. You cannot use this qualifier
    when you have specified the /INTERFACE=DECWINDOWS qualifier.

    If you specify /OUTPUT but you do not specify a file name, the
    CDA Viewer creates a file with the same name as your input
    file but with a file type of LIS. If you specify the /OUTPUT
    qualifier, you cannot also specify the /PAGE qualifier.

2.6    /OVERRIDE_FORMAT

       /OVERRIDE_FORMAT
       /NOOVERRIDE_FORMAT (default)

    Controls whether the CDA Viewer overrides the format of your
    document or uses the formatting information stored in your
    document.

2.7    /PAGE

       /PAGE
       /NOPAGE (default)

    On a character cell terminal, this qualifier determines whether
    the output display of the CDA Viewer pauses after displaying
    each page of your file. If you specify the /PAGE qualifier,
    you can page backward and forward, or jump to the top or
    bottom of the document. Note that if you specify the /PAGE
    qualifier, you cannot specify either the /OUTPUT qualifier or
    the /INTERFACE=DECWINDOWS qualifier.

2.8    /WIDTH

       /WIDTH=nn

    Specifies the number of characters per line. If you specify the
    /OVERRIDE_FORMAT qualifier, or if the document being viewed has
    no inherent format, this page width is used. On the DECwindows
    Motif display, the default width is 85 characters, which is
    equivalent to the default page width of 8.5 inches. On character
    cell displays, the page width defaults to your terminal's screen
    width. However, if you use the /OUTPUT qualifier, the default is
    132 columns.

3  –  Domain Converter Options

    When you view a tabular input file (for example, a DTIF file),
    the file format first undergoes an automatic domain conversion
    from a table format to the DDIF format. The output is then
    displayed on your screen.

    To help ensure minimal format and content changes when the
    tabular file is processed for display, you can create an options
    file containing processing options that apply to any CDA-
    supported tabular file format. Data tables and spreadsheets are
    examples of tabular file formats.

    In the options file, type the DTIF_TO_DDIF format name, followed
    by the processing options described here. Specify the DTIF_TO_
    DDIF processing options in addition to the processing options for
    a particular tabular input file format.

3.1  –  COLUMN_TITLE

    COLUMN_TITLE displays the column titles as contained in the
    column attributes centered at the top of the column.

3.2  –  CURRENT_DATE

    CURRENT_DATE displays the current date and time in the bottom
    left corner of the page. The value is formatted according to the
    document's specification for a default date and time.

3.3  –  DOCUMENT_DATE

    DOCUMENT_DATE displays the document date and time as contained
    in the document header in the top left corner of the page. The
    value is formatted according to the document's specification for
    a default date and time.

3.4  –  DOCUMENT_TITLE

    DOCUMENT_TITLE displays the document title or titles as contained
    in the document header centered at the top of the page, one
    string per line.

3.5  –  PAGE_NUMBER

    PAGE_NUMBER displays the current page number in the top right
    corner of the page.

3.6  –  PAPER SIZE keyword

    PAPER_SIZE specifies the size of the paper to be used when
    formatting the file. Valid values for the size argument are as
    follows:

    Keyword            Size

    A0                 841 x 1189 millimeters (33.13 x 46.85 inches)
    A1                 594 x 841 millimeters (23.40 x 33.13 inches)
    A2                 420 x 594 millimeters (16.55 x 23.40 inches)
    A3                 297 x 420 millimeters (11.70 x 16.55 inches)
    A4                 210 x 297 millimeters (8.27 x 11.70 inches)
    A5                 148 x 210 millimeters (5.83 x 8.27 inches)
    A                  8.5 x 11 inches
    B                  11 x 17 inches
    B4                 250 x 353 millimeters (9.84 x 13.90 inches)
    B5                 176 x 250 millimeters (6.93 x 9.84 inches)
    C                  17 x 22 inches
    C4                 229 x 324 millimeters (9.01 x 12.76 inches)
    C5                 162 x 229 millimeters (6.38 x 9.02 inches)
    D                  22 x 34 inches
    DL                 110 x 220 millimeters (4.33 x 8.66 inches)
    E                  34 x 44 inches
    10x13_ENVELOPE     10 x 13 inches
    9x12_ENVELOPE      9 x 12 inches
    BUSINESS_ENVELOPE  4.13 x 9.5 inches
    EXECUTIVE          7.5 x 10 inches
    LEDGER             11 x 17 inches
    LEGAL              8.5 x 14 inches
    LETTER             8.5 x 11 inches
    LP                 13.7 x 11 inches
    VT                 8 x 5 inches

    The A paper size (8.5 x 11 inches) is the default.

3.7  –  PAPER HEIGHT value

    PAPER_HEIGHT specifies a paper size other than one of the
    predefined values provided. The default paper height is 11
    inches.

3.8  –  PAPER WIDTH value

    PAPER_WIDTH specifies a paper size other than one of the
    predefined sizes provided. The default paper width is 8.5
    inches.

3.9  –  PAPER TOP MARGIN value

    PAPER_TOP_MARGIN specifies the width of the margin provided at
    the top of the page. The default value is 0.25 inch.

3.10  –  PAPER BOTTOM MARGIN value

    PAPER_BOTTOM_MARGIN specifies the width of the margin provided at
    the bottom of the page. The default value is 0.25 inch.

3.11  –  PAPER LEFT MARGIN value

    PAPER_LEFT_MARGIN specifies the width of the margin provided on
    the left-hand side of the page. The default value is 0.25 inch.

3.12  –  PAPER RIGHT MARGIN value

    PAPER_RIGHT_MARGIN specifies the width of the margin provided on
    the right-hand side of the page. The default value is 0.25 inch.

3.13  –  PAPER ORIENTATION keyword

    PAPER_ORIENTATION specifies the paper orientation to be used in
    the output file. The valid values for the orientation argument
    are as follows:

    Keyword         Meaning

    PORTRAIT        The page is oriented so that the larger dimension
                    is parallel to the vertical axis.

    LANDSCAPE       The page is oriented so that the larger dimension
                    is parallel to the horizontal axis.

    The default is PORTRAIT.

4  –  Creating the Options File

    You can create an options file prior to specifying the VIEW
    command with the /OPTIONS qualifier. An options file is a text
    file with a default file extension of .CDA$OPTIONS on OpenVMS
    systems.

    The options file contains all the processing options for your
    input file format. Processing options help ensure minimal format
    and content changes while the CDA Viewer processes your input
    file for display.

    An options file is not required. Default processing options are
    applied automatically when you convert a file. You may, however,
    require settings other than the default.

    Enter options in the options file using this format, where format
    is the name of the file format to which the option applies and
    option is the option:

    format option [value]  applies an input file of the specified
                           format

    Use uppercase and lowercase alphabetic characters, digits (0-9),
    dollar signs ($), and underscores (_) to specify the processing
    options.

    Use one or more spaces or tabs to precede values specified for a
    processing option.

    The following example is a typical entry in an options file:

    DTIF_TO_DDIF PAPER_HEIGHT 11

    The value specified for PAPER_HEIGHT is in inches by default.

    If the options file includes options that do not apply to
    the converter for a particular file format, those options are
    ignored.

    If you specify an invalid option for an input or output format or
    an invalid value for an option, you receive an error message. The
    processing options described in the following sections document
    any restrictions.

5  –  Example

  $ VIEW MY_INPUT.DTIF/FORMAT=DTIF/OPTIONS=MY_
 OPT.CDA$OPTIONS /NOOUTPUT -
  _$ /NOPAGE /INTERFACE=DECWINDOWS /OVERRIDE_
 FORMAT /WIDTH=80 /HEIGHT=66

      This command invokes the CDA Viewer to view a file named MY_
      INPUT.DTIF, which has the DTIF format. The display interface
      is DECwindows Motif, and the CDA Viewer will override the
      document's default format. The display width will be 80
      characters, and the display height will be 66 lines.
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