yaz-icu(1)


NAME

   yaz-icu - YAZ ICU utility

SYNOPSIS

   yaz-icu [-c config] [-p opt] [-s] [-x] [infile]

DESCRIPTION

   yaz-icu is utility which demonstrates the ICU chain module of yaz.
   (yaz/icu.h).

   The utility can be used in two ways. It may read some text using an XML
   configuration for configuring ICU and show text analysis. This mode is
   triggered by option -c which specififies the configuration to be used.
   The input file is read from standard input or from a file if infile is
   specified.

   The utility may also show ICU information. This is triggered by option
   -p.

OPTIONS

   -c config
       Specifies the file containing ICU chain configuration which is XML
       based.

   -p type
       Specifies extra information to be printed about the ICU system. If
       type is c then ICU converters are printed. If type is l available
       locales are printed. If type is t available transliterators are
       printed.

   -s
       Specifies that output should include sort key as well. Note that
       sort key differs between ICU versions.

   -x
       Specifies that output should be XML based rather than "text" based.

ICU CHAIN CONFIGURATION

   The ICU chain configuration speicifies one or more rules to convert
   text data into tokens. The configuration format is XML based.

   The toplevel element must be named icu_chain. The icu_chain element has
   one required attribute locale which specifies the ICU locale to be used
   in the conversion steps.

   The icu_chain element must include elements where each element
   specifies a conversion step. The conversion is performed in the order
   in which the conversion steps are specified. Each conversion element
   takes one attribute: rule which serves as argument to the conversion
   step.

   The following conversion elements are available:

   casemap
       Converts case and rule specifies how:

       l
           Lowercase using ICU function u_strToLower.

       u
           Upper case using ICU function u_strToUpper.

       t
           To title using UCU function u_strToTitle.

       f
           Fold case using ICU function u_strFoldCase.

   display
       This is a meta step which specifies that a term/token is to be
       displayed. This term is retrieved in an application using function
       icu_chain_token_display (yaz/icu.h).

   transform
       Specifies an ICU transform rule using a transliterator Identifier.
       The rule attribute is the transliterator Identifier. See ICU
       Transforms[1] for more information.

   transliterate
       Specifies a rule-based transliterator. The rule attribute is the
       custom transformation rule to be used. See ICU Transforms[1] for
       more information.

   tokenize
       Breaks / tokenizes a string into components using ICU functions
       ubrk_open, ubrk_setText, .. . The rule is one of:

       l
           Line. ICU: UBRK_LINE.

       s
           Sentence. ICU: UBRK_SENTENCE.

       w
           Word. ICU: UBRK_WORD.

       c
           Character. ICU: UBRK_CHARACTER.

       t
           Title. ICU: UBRK_TITLE.

EXAMPLES

   The following command analyzes text in file text using ICU chain
   configuration chain.xml:

           cat text | yaz-icu -c chain.xml

   The chain.xml might look as follows:

       <icu_chain locale="en">
         <transform rule="[:Control:] Any-Remove"/>
         <tokenize rule="w"/>
         <transform rule="[[:WhiteSpace:][:Punctuation:]] Remove"/>
         <transliterate rule="xy > z"/>
         <display/>
         <casemap rule="l"/>
       </icu_chain>

SEE ALSO

   yaz(7)

   ICU Home[2]

   ICU Transforms[1]

NOTES

    1. ICU Transforms
       http://userguide.icu-project.org/transforms/general

    2. ICU Home
       http://www.icu-project.org/





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