instant


Synopsis
       instant [ -bhuvxHISW ]  [ -t file]  [ -s file]  [ -c file]  [ -o file]
       [ -D variable=value ...]  [ -i id]  [ -l directory]  [file]

Description
       The instant program manipulates an SGML document instance in a  variety
       of  ways,  including  translating into a form suitable for a formatting
       application and printing information about  this  instance.   Input  to
       instant  is the output of nsgmls, whose format is called Element Struc-
       ture Information Set (ESIS).

Flags
       The following are the possible command line options to instant.  Output
       is sent to the standard output, except where otherwise noted.

       -t file
              Translate  the  SGML  instance to another form, usually suitable
              for a formatting application.  The file is called a  translation
              spec,  which  specifies  how  the tags are to be translated. See
              transpec(5).  By convention, names for file use the suffix  .ts,
              for translation spec.

       -s file
              Specifies a file of mappings for SDATA entities in the instance.
              The file is of two columns, separated by one or more tabs.  Spa-
              ces  can  not be used as the separator because spaces are allow-
              able as the content of the columns.  The  first  column  is  the
              entity  data  to  map, the second is the string that the data is
              mapped to.  The entity data is typically what is found in public
              ISO  entity  sets,  such as the General Technical and Publishing
              sets.  The mappings are specific to the  formatting  application
              used.   For example, to map the em dash entity, [mdash ], in the
              Publishing set to the TeX representation, the first column would
              be [mdash ] and the second column ---.  Lines beginning with a #
              are comments, and are ignored. Empty lines are also ignored.

       -c file
              Specifies a file  of  string  mappings  for  characters  in  the
              instance.  The file is of two columns, separated by white space.
              The first is the character to map, the second is the string that
              the  character  is  mapped to.  The mappings are specific to the
              formatting application used.  Lines beginning with a # are  com-
              ments, and are ignored. Empty lines are also ignored.

       -d     strip newline at the beginning of data records

       -f length
              Set  the threshold for the length, in characters, of an <Entry>,
              over which it is called a block of filled text, to length.

       -o file
              Write all output (except error and  warning  messages)  to  file
              file. By default, output goes to stdout.

       -x     Print  the  context  of  each element in the instance, from each
              element to the root of the document tree.

       -v     Validate the SGML instance based on the set  of  constraints  or
              descriptions  in the transpec file.  This flags tells instant to
              turn off normal output, leaving only diagnostics.

       -l directory
              Try to read the translation specs or other  files  from  in  the
              directory directory if not found in the current directory.  This
              is called  the  library  directory.   The  environment  variable
              TPT_LIB may also be used to specify this.

       -b     Interactive  browser  mode.  The  user  is prompted for actions,
              which include moving among and examining the  various  nodes  in
              the  hierarchy  of  the  instance,  displaying information about
              them, etc.

       -I     List the IDs of all elements in the instance that  have  an  ID.
              The  format  is  more  suitable  for other programs than humans.
              Lines show the ID, element GI, filename, and line, separated  by
              colons.   (This depends on the -l option to nsgmls which provide
              filenames and line numbers.)

       -i id  When translating the instance, begin processing at  the  element
              whose ID is id instead of the topmost element.

       -D variable=value
              Define the variable variable with value value.

       -W     Do not print warning messages.

       -H     Print a help message briefly describing the options.

       file   Read  the  instance  from the file file.  This is expected to be
              the output of the program nsgmls.   If  not  specified,  instant
              reads the instance from its standard input.

       In some cases it makes no sense to combine options.  This is especially
       true if one of the options is to perform a translation. No checking  is
       done for this.

Interactive Browser
       These are the commands to the interactive browser:

       cd args ...
              Change  to  a different element in the hierarchy.  cd id id will
              change to the element whose ID is id.  cd N will change  to  the
              Nth  child  element of the current element.  Several values of N
              may be specified, so the program  will  change  to  successively
              descending  elements in the hierarchy.  The string .. may appear
              for N to move up a level in the hierarchy (like in a  unix  file
              system).  A / may be specified for N to change to the top of the

              child gi
                     Find all elements which have a child element gi.

              gi gi  Find all elements whose name is gi.

              attr name value
                     Find  all elements that have a attribute name that have a
                     value value.

       id ID  Show location of element whose ID is ID.  If ID is  ?,  it  will
              list all IDs with the paths to them.

       ls     List  information  about  the  current element in the hierarchy.
              This includes element name, line number  in  instance,  context,
              attributes  and  their  values,  child  elements,  data directly
              within this element, and the order of the current element  among
              its siblings.

       q relation element
              Report whether or not the current element has the relation rela-
              tion to the named element element.  Values of relation  are  the
              same as for _followrel in transpec reference page.

       stat   Show statistics about the hierarchy.

       sum    Show a tag usage summary about the hierarchy.

       tran transpec outfile
              Write  translated  output using trans spec transpec to file out-
              file.  If outfile is not specified, output is sent to stdout.

       tree   Print a textual representation of the hierarchy of the instance,
              where deeper elements are indented more.

       where  Show current position in the hierarchy.

       <control-D>
              Exits the program.

       The  stat, sum, tree, cont commands take an optional first argument (of
       any value), which means to only consider the entire instance instead of
       the hierarchy from the current element.

Files
       file.ts
              Translation specification file.

       file.sdata
              SDATA entity mapping file.

       file.cmap
              Character mapping file.
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