YAZ-ICU(1) Commands YAZ-ICU(1)NAMEyaz-icu - YAZ ICU utility
SYNOPSISyaz-icu [-c config] [-p opt] [-s] [-x] [infile]
DESCRIPTIONyaz-icu is a 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 specifies 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, then
available locales are printed. If type is t, then 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 specifies 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
Lower case using ICU function u_strToLower.
u
Upper case using ICU function u_strToUpper.
t
To title using ICU 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.
join
Joins tokens into one string. The rule attribute is the joining
string, which may be empty. The join conversion element was added
in YAZ 4.2.49.
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 ALSOyaz(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/
YAZ 5.15.1 11/12/2015 YAZ-ICU(1)
