Crossdics
- Main article: Building dictionaries
Crossdics (part of apertium-dixtools) is a program that can be used to "cross" language pairs. That is, given language pairs aa-bb and bb-cc it will create a new language pair for aa-cc.
Installing
See apertium-dixtools.
Using apertium-crossdics
$ apertium-dixtools cross
Crossing dictionaries
Using a Linguistic Resources Document
You can define a Linguistic Resources Document (LRD) and use it to indicate which dictionaries will be used for crossing:
$ apertium-dixtools cross -f my-linguistic-resources.xml sl-tl
Therefore, only 2 parameters are needed:
- my-linguistic-resources.xml: a document specifying a set of linguistic resources (dictionaries, cross models, corpora, other LRD files, etc).
- sl-tl: source language (sl) and target language (tl).
Without a Linguistic Resources Document
First of all, copy linguistic data into folder "dics"
- Bilingual dictionary B-A:
apertium-bb-aa.bb-aa.dix - Bilingual dictionary B-C:
apertium-bb-cc.bb-cc.dix - Morphological dictionary A:
apertium-bb-aa.aa.dix - Morphological dictionary C:
apertium-bb-cc.cc.dix
Please note that:
- all dictionaries must be in the form:
apertium-xx-yy.xx-yy.dix(bilingual dictionaries)apertium-xx-yy.xx.dix(morphological dictionaries)
- the common language (B) must be in the left side, that is, dictionaries in the form B-A and B-C
- use "-r" instead of "-n" if the dictionary has to be reversed (apertium-aa-bb.aa-bb.dix to apertium-bb-aa.bb-aa.dix)
Use the apertium-dixtools script to cross the dictionaries:
$ apertium-dixtools cross-param monA.dix -n bilBA.dix -n bilBC-dix monC.dix
An example crossing es-ca and es-pt to get the ca-pt pair.
$ apertium-dixtools cross-param dics/apertium-es-ca.ca.dix -n dics/apertium-es-ca.es-ca.dix -n dics/apertium-es-pt.es-pt.dix dics/apertium-es-pt.pt.dix
- I was not able to do this without appending /usr/local/apertium-dixtools/schemas/cross-model.xml to the end of the command. --unhammer (talk) 21:19, 14 April 2015 (CEST)
Customising cross actions
By default, the crossdics tool uses a simple cross model defining very simple rules for crossing two sets of dictionaries. However, more specific cross actions might be needed in order to cross certain language pairs correctly. Defining a new cross schema with concrete pattern-action elements solves this problem.
Troubleshooting
- NullPointerException in crossing sections
[9] Crossing sections 'main' and 'main'
Exception in thread "main" java.lang.NullPointerException
at dictools.cross.DicCross.crossSections(DicCross.java:342)
at dictools.cross.DicCross.crossDictionaries(DicCross.java:233)
If you get this error, try and remove unused sections from the bilingual dictionaries until you have only the 'main' sections left.
- java.lang.IllegalArgumentException
- Comparison method violates its general contract!
Exception in thread "main" java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.TimSort.mergeHi(TimSort.java:868)
at java.util.TimSort.mergeAt(TimSort.java:485)
at java.util.TimSort.mergeForceCollapse(TimSort.java:426)
at java.util.TimSort.sort(TimSort.java:223)
at java.util.TimSort.sort(TimSort.java:173)
at java.util.Arrays.sort(Arrays.java:659)
at java.util.Collections.sort(Collections.java:217)
at dictools.cross.DicCross.crossDictionaries(DicCross.java:243)
at dictools.cross.DicCross.actionCross(DicCross.java:729)
at dictools.cross.DicCross.doCross(DicCross.java:722)
at dictools.ProcessDics.process_cross_param(ProcessDics.java:462)
at dictools.ProcessDics.processArguments(ProcessDics.java:206)
at dictools.ProcessDics.main(ProcessDics.java:79)
at ProcessDics.main(ProcessDics.java:30)
This means your java is too fresh. Get an older java (1.6 seems to work).
