ispell


DESCRIPTION
       Ispell(1)  requires  two files to define the language that it is spell-
       checking.  The first file is a dictionary containing words for the lan-
       guage,  and  the  second is an "affix" file that defines the meaning of
       special flags in the dictionary.  The two files are combined by  build-
       hash  (see ispell(1)) and written to a hash file which is not described
       here.

       A raw ispell dictionary (either the main dictionary or  your  own  per-
       sonal  dictionary)  contains  a list of words, one per line.  Each word
       may optionally be followed by a slash ("/")  and  one  or  more  flags,
       which  modify  the  root  word  as  explained  below.  Depending on the
       options with which ispell was built, case may or may not be significant
       in  either the root word or the flags, independently.  Specifically, if
       the compile-time option CAPITALIZATION is defined, case is  significant
       in  the  root  word;  if not, case is ignored in the root word.  If the
       compile-time option MASKBITS is set to a value of 32, case  is  ignored
       in the flags; otherwise case is significant in the flags.  Contact your
       system administrator or ispell maintainer for more information (or  use
       the -vv flag to find out).  The dictionary should be sorted with the -f
       flag of sort(1) before the hash file is built; this is  done  automati-
       cally  by  munchlist(1), which is the normal way of building dictionar-
       ies.

       If the dictionary contains words that have string characters  (see  the
       affix-file  documentation  below),  they  must be written in the format
       given by the defstringtype statement in the affix file.  This  will  be
       the  case  for most non-English languages.  Be careful to use this for-
       mat, rather than that of your favorite formatter, when adding words  to
       a  dictionary.  (If you add words to your personal dictionary during an
       ispell session, they will automatically be  converted  to  the  correct
       format.   This  feature  can be used to convert an entire dictionary if
       necessary:)

                   echo qqqqq > dummy.dict
                   buildhash dummy.dict affix-file dummy.hash
                   awk '{print "*"}END{print "#"}' old-dict-file \
                   | ispell -a -T old-dict-string-type \
                     -d ./dummy.hash -p ./new-dict-file \
                     > /dev/null
                   rm dummy.*

       The case of the root word  controls  the  case  of  words  accepted  by
       ispell, as follows:

       (1)    If the root word appears only in lower case (e.g., bob), it will
              be accepted in lower case, capitalized, or all capitals.

       (2)    If the root word appears capitalized (e.g., Robert), it will not
              be  accepted in all-lower case, but will be accepted capitalized
              or all in capitals.

       (3)    If the root word appears all in capitals (e.g., UNIX),  it  will
       from a raw dictionary by munchlist.

       For example, the dictionary:

              bob
              Robert
              UNIX
              ITcorp
              ITCorp

       will  accept  bob,  Bob, BOB, Robert, ROBERT, UNIX, ITcorp, ITCorp, and
       ITCORP, and will reject all others.  Some of the unacceptable forms are
       bOb, robert, Unix, and ItCorp.

       As  mentioned  above,  root  words in any dictionary may be extended by
       flags.  Each flag is a single alphabetic character, which represents  a
       prefix or suffix that may be added to the root to form a new word.  For
       example, in an English dictionary the D flag can be added to  bathe  to
       make bathed.  Since flags are represented as a single bit in the hashed
       dictionary, this results in significant space savings.   The  munchlist
       script will reduce an existing raw dictionary by adding flags when pos-
       sible.

       When a word is extended with an affix, the affix will be accepted  only
       if  it  appears in the same case as the initial (prefix) or final (suf-
       fix) letter of the word.  Thus, for example, the entry  UNIX/M  in  the
       main dictionary (M means add an apostrophe and an "s" to make a posses-
       sive) would accept UNIX'S but would reject UNIX's.  If UNIX's is legal,
       it  must appear as a separate dictionary entry, and it will not be com-
       bined by munchlist.  (In general, you don't need to worry  about  these
       things; munchlist guarantees that its output dictionary will accept the
       same set of words as its input, so all you have to do is add  words  to
       the dictionary and occasionally run munchlist to reduce its size).

       As  mentioned,  the affix definition file describes the affixes associ-
       ated with particular flags.  It also describes the character  set  used
       by the language.

       Although  the  affix-definition grammar is designed for a line-oriented
       layout, it is actually a free-format yacc grammar and can be  laid  out
       weirdly if you want.  Comments are started by a pound (sharp) sign (#),
       and continue to the end of the line.  Backslashes are supported in  the
       usual  fashion (\nnn, plus specials \n, \r, \t, \v, \f, \b, and the new
       hex format \xnn).  Any character with special meaning to the parser can
       be  changed  to an uninterpreted token by backslashing it; for example,
       you can declare a flag named 'asterisk' or 'colon'  with  flag  \*:  or
       flag \::.

       The grammar will be presented in a top-down fashion, with discussion of
       each element.  An affix-definition file must contain exactly one table:

              table     :    [headers] [prefixes] [suffixes]

       At least one of prefixes and suffixes is required.  They can appear  in

              fmtr-stmt :    { nroff-stmt | tex-stmt }

       A fmtr-stmt describes characters that have special meaning to a format-
       ter.  Normally, this statement is not necessary, but some languages may
       have preempted the usual defaults for use as language-specific  charac-
       ters.   In this case, these statements may be used to redefine the spe-
       cial characters expected by the formatter.

              nroff-stmt     :    { nroffchars | troffchars } string

       The nroffchars statement allows redefinition of certain  nroff  control
       characters.  The string given must be exactly five characters long, and
       must list substitutions for the left and right parentheses ("()") , the
       period  ("."), the backslash ("\"), and the asterisk ("*").  (The right
       parenthesis is not currently used, but is included  for  completeness.)
       For example, the statement:

              nroffchars {}.\\*

       would  replace the left and right parentheses with left and right curly
       braces for purposes of parsing nroff/troff strings, with no  effect  on
       the  others  (admittedly a contrived example).  Note that the backslash
       is escaped with a backslash.

              tex-stmt  :    { TeXchars | texchars } string

       The TeXchars statement allows redefinition of certain TeX/LaTeX control
       characters.  The string given must be exactly thirteen characters long,
       and must list substitutions for the left and right parentheses ("()") ,
       the  left  and  right  square brackets ("[]"), the left and right curly
       braces ("{}"), the left and right angle brackets ("<>"), the  backslash
       ("\"),  the  dollar  sign  ("$"), the asterisk ("*"), the period or dot
       ("."), and the percent sign ("%").  For example, the statement:

              texchars ()\[]<\><\>\\$*.%

       would replace the functions of the left and right curly braces with the
       left  and  right  angle brackets for purposes of parsing TeX/LaTeX con-
       structs, while retaining their functions for the tib bibliographic pre-
       processor.   Note  that the backslash, the left square bracket, and the
       right angle bracket must be escaped with a backslash.

              opt-stmt  :    { cmpnd-stmt | aff-stmt }

              cmpnd-stmt     :    compoundwords compound-opt

              aff-stmt       :    allaffixes on-or-off

              on-or-off :    { on | off }

              compound-opt : { on-or-off | controlled character }

       An opt-stmt controls certain ispell defaults that are  best  made  lan-
       Norwegian,  which  form  large  numbers of compound words.  Finally, if
       compoundwords is set to controlled, only words  marked  with  the  flag
       indicated  by  character  (which  should not be otherwise used) will be
       allowed to participate in  compound  formation.   Because  this  option
       requires  the flags to be specified in the dictionary, it is not avail-
       able from the command line.

              flag-stmt :    flagmarker character

       The flagmarker statement describes the character which is used to sepa-
       rate  affix  flags  from  the root word in a raw dictionary file.  This
       must be a character which is not found in any word (including in string
       characters;  see  below).  The default is "/" because this character is
       not normally used to represent special characters in any language.

              num-stmt  :    compoundmin digit

       The compoundmin statement controls the length of the two components  of
       a compound word.  This only has an effect if compoundwords is turned on
       or if the -C flag is given to ispell.  In  that  case,  only  words  at
       least  as long as the given minimum will be accepted as components of a
       compound.  The default is 3 characters.

              char-sets :    norm-sets [ alt-sets ]

       The character-set section describes the characters that can be part  of
       a word, and defines their collating order.  There must always be a def-
       inition of "normal" character sets;  in addition, there may be  one  or
       more  partial definitions of "alternate" sets which are used with vari-
       ous text formatters.

              norm-sets :    [ deftype ] charset-group

       A "normal" character set may optionally begin with a definition of  the
       file  suffixes  that  make  use of this set.  Following this are one or
       more character-set declarations.

              deftype : defstringtype name deformatter suffix*

       The defstringtype declaration gives  a  list  of  file  suffixes  which
       should make use of the default string characters defined as part of the
       base character set; it is only necessary if string characters are being
       defined.  The name parameter is a string giving the unique name associ-
       ated with these suffixes; often it is a formatter name.  If the format-
       ter  is  a  member  of the troff family, "nroff" should be used for the
       name associated with the most popular macro package; members of the TeX
       family  should  use  "tex".  Other names may be chosen freely, but they
       should be kept simple, as they are used in ispell 's -T switch to spec-
       ify  a  formatter type.  The deformatter parameter specifies the defor-
       matting style to use when processing files  with  the  given  suffixes.
       Currently, this must be either tex or nroff.  The suffix parameters are
       a whitespace-separated list of strings which, if present at the end  of
       a  filename,  indicate  that  the  associated  set of string characters
       should be used by default for this file.  For example, the suffix  list

              char-stmt :    wordchars character-range
                        |    wordchars lowercase-range uppercase-range
                        |    boundarychars character-range
                        |    boundarychars lowercase-range uppercase-range
              string-stmt    :    stringchar string
                        |    stringchar lowercase-string uppercase-string

       Characters described with the boundarychars  statement  are  considered
       part  of a word only if they appear singly, embedded between characters
       declared with the wordchars or stringchar statements.  For example,  if
       the hyphen is a boundary character (useful in French), the string "foo-
       bar" would be a single word, but "-foo" would be the same as "foo", and
       "foo--bar" would be two words separated by non-word characters.

       If  two  ranges or strings are given in a char-stmt or string-stmt, the
       first describes characters that are interpreted as  lowercase  and  the
       second describes uppercase.  In the case of a stringchar statement, the
       two strings must be of the same length.  Also, in a  stringchar  state-
       ment,  the  actual  strings  may  contain both uppercase and characters
       themselves without difficulty; for instance, the statement

              stringchar     "\\*(sS"  "\\*(Ss"

       is legal and will not interfere with (or be interfered with  by)  other
       declarations of of "s" and "S" as lower and upper case, respectively.

       A  final note on string characters: some languages collate certain spe-
       cial characters as if they were strings.  For example, the  German  "a-
       umlaut"  is  traditionally  sorted  as  if it were "ae".  Ispell is not
       capable of this; each  character  must  be  treated  as  an  individual
       entity.   So  in certain cases, ispell will sort a list of words into a
       different order than the standard "dictionary"  order  for  the  target
       language.

              alt-sets  :    alttype [ alt-stmt* ]

       Because  different formatters use different notations to represent non-
       ASCII characters, ispell must be aware of the representations  used  by
       these formatters.  These are declared as alternate sets of string char-
       acters.

              alttype   :    altstringtype name suffix*

       The altstringtype statement introduces each set by declaring the  asso-
       ciated formatter name and filename suffix list.  This name and list are
       interpreted exactly as in the defstringtype statement above.  Following
       this  header  are  one  or  more  alt-stmts which declare the alternate
       string characters used by this formatter.

              alt-stmt       :    altstringchar alt-string std-string

       The altstringchar statement  describes  alternate  representations  for
       string  characters.  For example, the -mm macro package of troff repre-
       ter sequences which describe upper- and lower-case versions of the same
       printable  character must also be the same length.  It may be necessary
       to define some new macros  for  a  given  formatter  to  satisfy  these
       restrictions.  (The current version of buildhash does not enforce these
       restrictions, but failure to obey  them  may  result  in  errors  being
       introduced into files that are processed with ispell.)

       An  important  minor  point  is that ispell assumes that all characters
       declared as wordchars or boundarychars will occupy exactly one position
       on the terminal screen.

       A  single character-set statement can declare either a single character
       or a contiguous range of characters.  A range is given as in egrep  and
       the shell: [a-z] means lowercase alphabetics; [^a-z] means all but low-
       ercase, etc.  All character-set statements are  combined  (unioned)  to
       produce  the  final list of characters that may be part of a word.  The
       collating order of the characters is defined by the order of their dec-
       laration;  if  a  range  is used, the characters are considered to have
       been declared in ASCII order.  Characters that have case  are  collated
       next to each other, with the uppercase character first.

       The  character-declaration  statements  have  a rather strange behavior
       caused by its need to match each lowercase character with its uppercase
       equivalent.   In  any  given  wordchars or boundarychars statement, the
       characters  in  each  range  are  first  sorted  into  ASCII  collating
       sequence,  then  matched  one-for-one  with  the other range.  (The two
       ranges must have the same number of characters).   Thus,  for  example,
       the two statements:

              wordchars [aeiou] [AEIOU]
              wordchars [aeiou] [UOIEA]

       would  produce  exactly the same effect.  To get the vowels to match up
       "wrong", you would have to use separate statements:

              wordchars a U
              wordchars e O
              wordchars i I
              wordchars o E
              wordchars u A

       which would cause uppercase 'e' to be 'O', and lowercase 'O' to be 'e'.
       This  should  normally be a problem only with languages which have been
       forced to use a strange ASCII collating sequence.   If  your  uppercase
       and  lowercase  letters  both  collate in the same order, you shouldn't
       have to worry about this "feature".

       The prefixes and suffixes sections have exactly the same syntax, except
       for the introductory keyword.

              prefixes  :    prefixes flagdef*
              suffixes  :    suffixes flagdef*
              flagdef   :    flag [*|~] char : repl*

       (If  you  wish to use one of the option characters as a flag character,
       simply enclose it in double quotes.)

       The asterisk (*) option means that this  flag  participates  in  cross-
       product  formation.  This only matters if the file contains both prefix
       and suffix tables.  If so, all prefixes and  suffixes  marked  with  an
       asterisk  will  be  applied in all cross-combinations to the root word.
       For example, consider the root fix with prefixes pre and in,  and  suf-
       fixes  es and ed.  If all flags controlling these prefixes and suffixes
       are marked with an asterisk, then the single root fix would also gener-
       ate  prefix,  prefixes,  prefixed, infix, infixes, infixed, fix, fixes,
       and fixed.  Cross-product formation can produce a large number of words
       quickly, some of which may be illegal, so watch out.  If cross-products
       produce illegal words, munchlist will not produce those  flag  combina-
       tions, and the flag will not be useful.

              repl :    condition* > [ - strip-string , ] append-string

       The  ~  option specifies that the associated flag is only active when a
       compound word is being formed.  This is useful in a language like  Ger-
       man, where the form of a word sometimes changes inside a compound.

       A repl is a conditional rule for modifying a root word.  Up to 8 condi-
       tions may be specified.  If the conditions are satisfied, the rules  on
       the right-hand side of the repl are applied, as follows:

       (1)    If a strip-string is given, it is first stripped from the begin-
              ning or ending (as appropriate) of the root word.

       (2)    Then the append-string is added at that point.

       For example, the condition .  means "any word",  and  the  condition  Y
       means "any word ending in Y".  The following (suffix) replacements:

              .    >    MENT
              Y    >    -Y,IES

       would change induce to inducement and fly to flies.  (If they were con-
       trolled by the same flag, they would also change fly to flyment,  which
       might not be what was wanted.  Munchlist can be used to protect against
       this sort of problem; see the command sequence given below.)

       No matter how much you might wish it, the strings on the right must  be
       strings  of  specific  characters,  not ranges.  The reasons are rooted
       deeply in the way ispell works, and it would be difficult or impossible
       to provide for more flexibility.  For example, you might wish to write:

              [EY] >    -[EY],IES

       This will not work.  Instead, you must use two separate rules:

              E    >    -E,IES
              Y    >    -Y,IES

       rule  applies  to all words indiscriminately).  This length is indepen-
       dent of the separate test that insists that all flags produce an output
       word length of at least four.

       Conditions  that  are  single  characters  should be separated by white
       space.  For example, to specify words ending in "ED", write:

              E D  >    -ED,ING        # As in covered > covering

       If you write:

              ED   >    -ED,ING

       the effect will be the same as:

              [ED] >    -ED,ING

       As a final minor, but  important  point,  it  is  sometimes  useful  to
       rebuild a dictionary file using an incompatible suffix file.  For exam-
       ple, suppose you expanded the "R" flag to generate "er" and "ers" (thus
       making  the  Z flag somewhat obsolete).  To build a new dictionary new-
       dict that, using newaffixes, will accept exactly the same list of words
       as  the  old list olddict did using oldaffixes, the -c switch of munch-
       list is useful, as in the following example:

              $ munchlist -c oldaffixes -l newaffixes olddict > newdict

       If you use this procedure, your new dictionary will always  accept  the
       same  list  the  original  did,  even if you badly screwed up the affix
       file.  This is because munchlist compares the words generated by a flag
       with the original word list, and refuses to use any flags that generate
       illegal words.  (But don't forget that the munchlist step takes a  long
       time and eats up temporary file space).

EXAMPLES
       As an example of conditional suffixes, here is the specification of the
       S flag from the English affix file:

              flag *S:
                  [^AEIOU]Y  >    -Y,IES    # As in imply > implies
                  [AEIOU]Y   >    S         # As in convey > conveys
                  [SXZH]     >    ES        # As in fix > fixes
                  [^SXZHY]   >    S         # As in bat > bats

       The first line applies to words ending in Y, but not in  vowel-Y.   The
       second  takes  care of the vowel-Y words.  The third then handles those
       words that end in a sibilant or near-sibilant, and the  last  picks  up
       everything else.

       Note  that the conditions are written very carefully so that they apply
       to disjoint sets of words.  In particular, note that  the  fourth  line
       excludes  words ending in Y as well as the obvious SXZH.  Otherwise, it
       would convert "imply" into "implys".

                 [^EY]       >    ERS       # As in build > builders

       This flag would generate both  "skater"  and  "skaters"  from  "skate".
       This  capability can be very useful in languages that make use of noun,
       verb, and adjective endings.  For instance, one could define  a  single
       flag that generated all of the German "weak" verb endings.

SEE ALSO
       ispell(1)



                                     local                           ISPELL(5)
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