Bech: Category:Documentation in English

2012-03-24T11:06:08Z

Category:Documentation in English

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2011-12-21T13:56:30Z

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Jimregan: Created page with 'From time to time, the question comes up of how to match unknown words in transfer. In interchunk, this is quite easy, as each unknown word has the chunk lemma 'unknown', but it'…'

2011-12-21T13:32:10Z

Created page with 'From time to time, the question comes up of how to match unknown words in transfer. In interchunk, this is quite easy, as each unknown word has the chunk lemma 'unknown', but it'…'

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From time to time, the question comes up of how to match unknown words in transfer. In interchunk, this is quite easy, as each unknown word has the chunk lemma 'unknown', but it's un- or under-documented how this should be done using apertium-transfer.

The answer is to use a <code>cat-item</code> with an empty <code>tags</code> attribute:

<pre>
<cat-item tags=""/>
</pre>

An example:

<pre>
<?xml version="1.0"?>
<transfer default="chunk">
<section-def-cats>
<def-cat n="any">
<cat-item tags="*"/>
</def-cat>

<def-cat n="unk">
<cat-item tags=""/>
</def-cat>

</section-def-cats>

<section-def-attrs>
</section-def-attrs>

<section-def-vars>
</section-def-vars>

<section-rules>
<rule>
<pattern>
<pattern-item n="any"/>
</pattern>
<action>
<out>
<chunk name="any">
<tags>
<tag><clip pos="1" side="tl" part="tags"/></tag>
</tags>
<lu><clip pos="1" side="tl" part="whole"/></lu>
</chunk>
</out>
</action>
</rule>
<rule>
<pattern>
<pattern-item n="unk"/>
</pattern>
<action>
<out>
<chunk name="unk">
<tags>
<tag><clip pos="1" side="tl" part="tags"/></tag>
</tags>
<lu><clip pos="1" side="tl" part="whole"/></lu>
</chunk>
</out>
</action>
</rule>
</section-rules>
</transfer>
</pre>

Note that <code>tags</code> '''must''' be present (otherwise, the opening brace of the chunk is omitted).

Use:

<pre>
echo '^foo<n><sg>$ ^*bar$'|apertium-transfer -n unk.t1x unk.bin
^any<n><sg>{^foo<n><sg>$}$ ^unk{^*bar$}$
</pre>

← Older revision		Revision as of 11:06, 24 March 2012
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	[[Category:Writing transfer rules]]		[[Category:Writing transfer rules]]
			[[Category:Documentation in English]]

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 ^any<n><sg>{^foo<n><sg>$}$ ^unk{^*bar$}$
 </pre>
+[[Category:Writing transfer rules]]

Matching unknown words - Revision history

Bech: Category:Documentation in English

Unhammer: cat

Jimregan: Created page with 'From time to time, the question comes up of how to match unknown words in transfer. In interchunk, this is quite easy, as each unknown word has the chunk lemma 'unknown', but it'…'