Grammar: Difference between revisions
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In the UNL framework, a '''grammar''' is a set of rules that are used to generate UNL out of natural language, and | In the UNL framework, a '''grammar''' is a set of rules that are used to generate UNL out of natural language, and natural language out of UNL. | ||
== Types == | == Types == | ||
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*'''Transformation Grammar''', or T-Grammar, is the set of T-rules, which are used to transform structures<ref>To convert a list structure into a tree structure, a tree structure into a list structure, a tree structure into a network structure, and so on.</ref> | *'''Transformation Grammar''', or T-Grammar, is the set of T-rules, which are used to transform structures<ref>To convert a list structure into a tree structure, a tree structure into a list structure, a tree structure into a network structure, and so on.</ref> | ||
*'''Disambiguation Grammar''', or D-Grammar, the set of D-rules, which are used to improve the performance of the T-rules | *'''Disambiguation Grammar''', or D-Grammar, the set of D-rules, which are used to improve the performance of the T-rules | ||
The syntax and behavior of T-rules and D-rules are defined in the [[Grammar Specs]]. | |||
== Direction == | |||
In the UNL<sup>framework</sup>, we distinguish between analysis and generation grammars: | |||
*The '''UNL-NL (Generation) Grammar''' is used to generate natural language out of UNL | |||
*The '''NL-UNL (Analysis) Grammar''' is used to generate UNL out of natural language | |||
== Notes == | == Notes == | ||
<references /> | <references /> | ||
Revision as of 18:05, 17 September 2012
In the UNL framework, a grammar is a set of rules that are used to generate UNL out of natural language, and natural language out of UNL.
Types
In the UNLframework, we distinguish between transformation and disambiguation grammars:
- Transformation Grammar, or T-Grammar, is the set of T-rules, which are used to transform structures[1]
- Disambiguation Grammar, or D-Grammar, the set of D-rules, which are used to improve the performance of the T-rules
The syntax and behavior of T-rules and D-rules are defined in the Grammar Specs.
Direction
In the UNLframework, we distinguish between analysis and generation grammars:
- The UNL-NL (Generation) Grammar is used to generate natural language out of UNL
- The NL-UNL (Analysis) Grammar is used to generate UNL out of natural language
Notes
- ↑ To convert a list structure into a tree structure, a tree structure into a list structure, a tree structure into a network structure, and so on.
