Ambiguity - Revision history

Rcrowther at 18:06, 26 September 2016

2016-09-26T18:06:42Z

Unhammer: /* Part of Speech ambiguity */

2015-02-13T10:50:27Z

Part of Speech ambiguity

Unhammer: /* Word-Sense / Lexical Selection ambiguity */

2014-02-17T18:58:12Z

Word-Sense / Lexical Selection ambiguity

Unhammer at 08:41, 26 January 2012

2012-01-26T08:41:55Z

Unhammer: /* Pragmatic ambiguity */

2012-01-26T08:41:10Z

Pragmatic ambiguity

Unhammer: /* Syntactic ambiguity */

2012-01-26T08:30:59Z

Syntactic ambiguity

Francis Tyers: /* See also */

2011-11-17T09:38:36Z

Francis Tyers at 09:36, 17 November 2011

2011-11-17T09:36:18Z

Unhammer: /* See also */

2011-11-17T09:28:50Z

Unhammer: /* See also */

2011-11-17T09:28:15Z

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 [[Category:Ambiguity]]
 [[Category:Theoretical background]]
+[[Category:Documentation in English]]

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 </pre>
-The "[[apertium-tagger|PoS-tagger]]" (PoS-disambiguator) removes the ambiguity by selecting the most likely (and hopefully the correct) analysis:
+The "[[apertium-tagger|PoS-tagger]]" (PoS-disambiguator) and/or [[Constraint Grammar]] removes the ambiguity by selecting the most likely (and hopefully the correct) analysis:
 <pre>
 $ echo The banks|apertium -d trunk/apertium-en-es/ en-es-tagger

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 If we were translating to Spanish, this ''word sense ambiguity'' becomes important, since the first sense translates to 'orillas', while the second translates to 'bancos'.
-Note: just because a dictionary lists a word sense distinction, it isn't necessarily relevant for machine translation! We don't have to figure out whether '''banks''' refers to the buildings of the banks or the abstract financial institutions, it still translates to 'bancos'. For this reason, when we're talking about machine translation, we don't talk about '''word sense disambiguation''', but '''lexical selection''', selecting the best possible translation of a certain PoS analysis of a form.
+Note: just because a dictionary lists a word sense distinction, it isn't necessarily relevant for machine translation! We don't have to figure out whether '''banks''' refers to the buildings of the banks or the abstract financial institutions, it still translates to 'bancos'. For this reason, when we're talking about machine translation, we don't talk about '''word sense disambiguation''', but '''lexical selection''', selecting the best possible translation of a certain PoS analysis of a form. In general, good lexical selection is less important for getting a good translation than good PoS disambiguation.
-Lexical selection happens after PoS disambiguation, either before or after bidix lookup (word-translation). In general, good lexical selection is much less important for getting a good translation than good PoS disambiguation.
+In Apertium, lexical selection (with <code>lrx-proc</code>) happens after bidix lookup (word-translation), but before structural transfer rules. See [[Lexical selection]] for more information.
-Currently there is no agreed-upon lexical selection module in Apertium (different pairs use different methods), but see [[Lexical selection]] for a list of methods, some more experimental than others.
 ==Syntactic ambiguity==

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 * [[Lexical selection]]
 * [[Word sense disambiguation]]
+* [[Anaphora resolution]]
 ==External links==

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 ==Pragmatic ambiguity==
+Pragmatic ambiguity is amguity which is dependent on context.
+An example: If someone asks you "Headlights on?", they might be reminding you to turn them off, or on, or they might be asking if they themselves should turn them on. The sentence itself does not provide this background information.
+…
 ==See also==

@@ Line 46: / Line 46: @@
 ==Syntactic ambiguity==
+Consider the sentence ''Umberto saw the man with the spyglass''. Here, there are two equally feasible interpretations: Umberto saw the man who had the spyglass, or Umberto used a spyglass to see the man. This is a syntactic ambiguity, since the phrase ''with the spyglass'' can be syntactically attached to (or dependent on, if that's more in line with your favourite theory of syntax) the phrase ''the man'' or the verb ''saw''.
+This is just one of many kinds of syntactic ambiguity.
+…
 ==Pragmatic ambiguity==

← Older revision		Revision as of 09:36, 17 November 2011
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			{{TOCD}}
	In natural languages, we can have many different types of '''ambiguity''', e.g.:		In natural languages, we can have many different types of '''ambiguity''', e.g.:

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 ==See also==
-* [[Lexical selection]]
-* [[Constraint Grammar]]
 * [[Part-of-speech tagging]]
 * [[Tagger training]]
+* [[Constraint Grammar]]
+* [[Lexical selection]]
+* [[Word sense disambiguation]]
 [[Category:Documentation]]