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| The '''UNL-NL dictionaries''' are bilingual dictionaries linking [[Universal Words|UWs]] to natural language (NL) words. They can be unidirectional (UNL-to-NL or NL-to-UNL) or bidirectional (NL-to-UNL-to-NL). UNL-to-NL dictionaries are used for [[deconversion]], while NL-to-UNL are used for [[enconversion]]. | | The '''UNL-NL dictionaries''' are bilingual dictionaries linking [[Universal Words|UWs]] to natural language (NL) words. They can be unidirectional (UNL-to-NL or NL-to-UNL) or bidirectional (NL-to-UNL-to-NL). UNL-to-NL dictionaries are used for [[deconversion]], while NL-to-UNL are used for [[enconversion]]. |
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| == Syntax ==
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| In the [[UNL System]], the UNL-NL dictionaries are plain text files with a single entry per line in the following format:
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| [NLW] {ID} “UW” (ATTR , ... ) < LG , FRE , PRI >; COMMENTS
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| Where:
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| ;NLW
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| :The lexical item of the natural language. Its format should be decided by the dictionary builder. It can be:
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| ::*a multiword expression: [United States of America]
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| ::*a compound: [hot-dog]
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| ::*a simple word: [happiness]
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| ::*a simple morpheme: [happ]
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| ::*a complex structure*: [[bring] [back]]
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| ::*a non-motivated linguistic entity: [g]
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| <nowiki>*</nowiki> complex structures are used for infixation, as in “Bring him back”
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| ;ID
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| :The unique identifier (primary-key) of the entry.
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| ;UW
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| :The Universal Word of UNL. This field can be empty if a word does not need a UW.
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| ;ATTR
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| :The list of features of the NLW. It can be:
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| ::*a list of simple features: (NOU, MCL, SNG)
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| ::*a list of attribute-value pairs: (pos=NOU, gen=MCL, num=SNG)
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| ::*a list of attribute and transformation rules (see below): (plural:=”oo”:”ee”)
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| Attributes should be separated by “,”.
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| ;FLG
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| :The two-character language code according to ISO 639-1.
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| ;FRE
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| :The frequency of NLW in natural texts. Used for natural language analysis (NL-UNL). It can range from 0 (less frequent) to 255 (most frequent).
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| ;PRI
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| :The priority of the NLW. Used for natural language generation (UNL-NL). It can range from 0 to 255.
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| ;COMMENT
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| :Any comment necessary to clarify the mapping between NL and UNL entries. It should end with the return code.
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| == Transformation rules for dictionary entries ==
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| In order to deal with exceptions, infixation and irregular forms, the following rules can be included inside dictionary entries:
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| In case of simple transformation:<br >
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| <ATTRIBUTE>”:=”<SOURCE>”:”<TARGET><br >
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| In case of left appending:<br >
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| <ATTRIBUTE>”:=”<LEFT DELETION>”<”<LEFT ADDITION><br >
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| In case of right appending:<br >
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| <ATTRIBUTE>”:=”<RIGHT ADDITION>”>”<RIGHT DELETION><br >
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| Where:<br >
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| <ATTRIBUTE> is the name of the attribute<br >
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| <SOURCE> is the original form to be replaced (if empty, it means that the whole NLW should be replaced)<br >
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| <TARGET> is the form to be used instead of the source (if empty, it means that the whole NLW should be deleted)<br >
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| <LEFT DELETION> is the string or the number of characters from the beginning of the NLW to be deleted before the addition of the LEFT ADDITION<br >
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| <RIGHT DELETION> is the string or the number of characters from the end of the NLW to be deleted before the addition of the RIGHT ADDITION<br >
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| <LEFT ADDITION> is the string to be added to beginning of the NLW<br >
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| <RIGHT ADDITION> is the string to be added to the end of the NLW<br >
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The UNL-NL dictionaries are bilingual dictionaries linking UWs to natural language (NL) words. They can be unidirectional (UNL-to-NL or NL-to-UNL) or bidirectional (NL-to-UNL-to-NL). UNL-to-NL dictionaries are used for deconversion, while NL-to-UNL are used for enconversion.
