UNL System

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The '''UNL System''' is the set of UNL modules and the rules to combine them.
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The '''UNL System''' is the set of basic modules of UNL and the rules to combine them.
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== UNLization ==
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''Main article: [[UNLization]]''
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[[File:UNLization.png|thumb|left|200px]]
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UNLization is the process of representing the content of a natural language structure into UNL. This process is carried out by a [[Tools#UNLizers|UNLizer]]. The input for the UNLizer is a natural language document or set of documents. The UNLizer first  segments the natural language input according to the [[NL-UNL S-Grammar]]. Next, it [[tokenization|tokenizes]] each processing unit according to the [[NL-UNL Dictionary]] and the [[NL-UNL Memory]]. The tokenization process may be controlled by the [[NL-UNL D-Grammar]]. The resulting tokenized string is then syntactically and semantically analyzed with the [[NL-UNL T-Grammar]], which may be improved by the [[NL-UNL D-Grammar]], the [[NL Memory]], the [[UNL Memory]], the [[UNL Knowledge Base]] and the [[UNL Ontology]]. The output of the process is a UNL document, which may reflect either the deep or the surface structure of the text, of each sentence or of each word of the natural language input document, depending on the structure of the grammar.
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== NLization ==
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''Main article: [[NLization]]''
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[[File:NLization.png|thumb|left|200px]]
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NLization is the process of generating a natural language document out of UNL. This process is carried out by a [[Tools#NLizers|NLizer]]. The input for the NLization is a UNL document. The input document, which is already segmented according to the [[UNL Document Structure]], is [[tokenization|tokenized]], according to the [[UNL-NL Dictionary]] and the [[UNL-NL Memory]]. The tokenization process may be controlled by the [[UNL-NL D-Grammar]]. The resulting tokenized string is then syntactically and semantically analyzed with the [[UNL-NL T-Grammar]], which may be improved by the [[UNL-NL D-Grammar]], the [[NL Memory]], the [[UNL Memory]], the [[UNL Knowledge Base]] and the [[UNL Ontology]]. The output of the process is a natural language document, which may reflect either the deep or the surface structure of the whole or part of the UNL input document.
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== Modules ==
 
== Modules ==
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The modules of the UNL System are the following:
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*[[Lexica|Lexical Databases]]
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*the '''[[lingware]]''', i.e., the set of [[Lexica|lexical databases]] (dictionaries, knowledge bases and example bases) and [[grammar]]s that are used to process the UNL and each natural language
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**The '''UNL Ontology''', the '''UNL Knowledge Base''' and the '''UNL Memory''' are lists of semantic frames between UW's. These repositories include ontological relations ("a kind of" and "an instance of"), in case of UNL Ontology; necessary (ontological and thematic) relations (such as "is the agent of", "is the place where", "is the moment when"), in case of UNL Knowledge Base; and any typical relations, in case of the UNL Memory.
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*the '''[[software]]''', i.e., the set of [[tools]] (for UNLization, NLization and normalization) and [[applications]] that can be generated thereafter.  
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**The '''UNL<->NL Dictionary''' is a list of mappings between UW's and natural language entries. It is a bilingual dictionary where UW's are translated into [[LRU|lexical realisation units]] of a given natural language, and vice-versa.
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**The '''UNL<->NL Memory''' is a list of mappings between UNL and natural language extracted from previous UNLizations and NLizations.
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**The '''NL Memory''' is a list of syntactic frames between natural language entries.
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*[[Grammar]]s
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**The '''UNL<->NL T-Grammar''' is the set of transformation rules used to manipulate data structures.
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**The '''UNL<->NL D-Grammar''' is the set of disambiguation rules used to control the use of transformation rules.
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*[[Tools]]
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**'''UNLizers''' are tools used for UNLization ([[IAN]] and [[SEAN]], for instance).
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**'''NLizers''' are tools used for NLization ([[EUGENE]]).
  
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== Rules ==
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== Specs ==
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The rules of the UNL System are defined as a set of standards used to normalize the development of natural language resources in the UNL R&D network. Although highly recommendable, they are not compulsory, as they concern subsidiary aspects of UNL. In any case, they must be followed by those interested in using [[Tools|UNDLF tools]].
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;[[Tagset]]
 
;[[Tagset]]
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:The Grammar Specs state the syntax of grammar rules.
 
:The Grammar Specs state the syntax of grammar rules.
 
;[[KB Specs]]
 
;[[KB Specs]]
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:The UNL Knowledge Base Specs state the syntax of the knowledge bases.
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:The UNL Knowledge Base Specs state the syntax of knowledge bases.
 
;[[Memory Specs]]
 
;[[Memory Specs]]
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:The Memory Specs state the syntax of the example bases.
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:The Memory Specs state the syntax of example bases.

Latest revision as of 15:30, 24 September 2012

The UNL System is the set of basic modules of UNL and the rules to combine them.

Contents

UNLization

Main article: UNLization

UNLization.png

UNLization is the process of representing the content of a natural language structure into UNL. This process is carried out by a UNLizer. The input for the UNLizer is a natural language document or set of documents. The UNLizer first segments the natural language input according to the NL-UNL S-Grammar. Next, it tokenizes each processing unit according to the NL-UNL Dictionary and the NL-UNL Memory. The tokenization process may be controlled by the NL-UNL D-Grammar. The resulting tokenized string is then syntactically and semantically analyzed with the NL-UNL T-Grammar, which may be improved by the NL-UNL D-Grammar, the NL Memory, the UNL Memory, the UNL Knowledge Base and the UNL Ontology. The output of the process is a UNL document, which may reflect either the deep or the surface structure of the text, of each sentence or of each word of the natural language input document, depending on the structure of the grammar.

NLization

Main article: NLization

NLization.png

NLization is the process of generating a natural language document out of UNL. This process is carried out by a NLizer. The input for the NLization is a UNL document. The input document, which is already segmented according to the UNL Document Structure, is tokenized, according to the UNL-NL Dictionary and the UNL-NL Memory. The tokenization process may be controlled by the UNL-NL D-Grammar. The resulting tokenized string is then syntactically and semantically analyzed with the UNL-NL T-Grammar, which may be improved by the UNL-NL D-Grammar, the NL Memory, the UNL Memory, the UNL Knowledge Base and the UNL Ontology. The output of the process is a natural language document, which may reflect either the deep or the surface structure of the whole or part of the UNL input document.

Modules

  • Lexical Databases
    • The UNL Ontology, the UNL Knowledge Base and the UNL Memory are lists of semantic frames between UW's. These repositories include ontological relations ("a kind of" and "an instance of"), in case of UNL Ontology; necessary (ontological and thematic) relations (such as "is the agent of", "is the place where", "is the moment when"), in case of UNL Knowledge Base; and any typical relations, in case of the UNL Memory.
    • The UNL<->NL Dictionary is a list of mappings between UW's and natural language entries. It is a bilingual dictionary where UW's are translated into lexical realisation units of a given natural language, and vice-versa.
    • The UNL<->NL Memory is a list of mappings between UNL and natural language extracted from previous UNLizations and NLizations.
    • The NL Memory is a list of syntactic frames between natural language entries.
  • Grammars
    • The UNL<->NL T-Grammar is the set of transformation rules used to manipulate data structures.
    • The UNL<->NL D-Grammar is the set of disambiguation rules used to control the use of transformation rules.
  • Tools
    • UNLizers are tools used for UNLization (IAN and SEAN, for instance).
    • NLizers are tools used for NLization (EUGENE).

Specs

Tagset
The Tagset is a harmonized system for representing linguistic constants.
Dictionary Specs
The Dictionary Specs state the syntax of dictionaries.
Grammar Specs
The Grammar Specs state the syntax of grammar rules.
KB Specs
The UNL Knowledge Base Specs state the syntax of knowledge bases.
Memory Specs
The Memory Specs state the syntax of example bases.
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Software