Lexica
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*The [[UNL-NL Dictionary]], or simply UNL-NL<sup>dic</sup>, is list of systematic lexical mappings between UW's and natural language entries | *The [[UNL-NL Dictionary]], or simply UNL-NL<sup>dic</sup>, is list of systematic lexical mappings between UW's and natural language entries | ||
*The [[UNL-NL Memory]], or UNL Memory Base, or simply UNL-NL<sup>MB</sup>, is a list of mappings between UNL and a given natural language | *The [[UNL-NL Memory]], or UNL Memory Base, or simply UNL-NL<sup>MB</sup>, is a list of mappings between UNL and a given natural language | ||
| − | The main difference between the UNL-NL<sup>dic</sup> and the UNL-NL<sup>MB</sup> is that the former involves only lexical units (i.e., entries defined as such in the UNL and the NL dictionaries) whereas the latter involves translation units, which may include several lexical units | + | The main difference between the UNL-NL<sup>dic</sup> and the UNL-NL<sup>MB</sup> is that the former involves only lexical units (i.e., entries defined as such in the UNL and the NL dictionaries) whereas the latter involves translation units, which may include several lexical units. |
Revision as of 18:16, 17 September 2012
The UNL framework contains three different types of lexical databases: UNL-only, NL-only and UNL-NL.
UNL
The UNL lexical databases are the following:
- The UNL Dictionary, or simply UNLdic, is a flat list of UW's and their semantic features
- The UNL Knowledge Base, or simply UNLkb, is a network with systematic relations between UW's
- The UNL Example Base, or simply UNLeb, is a network with any relations between UW's
These three databases are nested. The UNLdic contains UW's and their basic semantic features (such as the information that the UW corresponding to "table" is a nominal concrete concept that belongs to the class of artifacts). The UNLkb contains the UNLdic and the set of relations that are necessary to define a UW (such as the information that "table" is a piece of furniture with vertical legs and a flat horizontal surface). The UNLeb contains the UNLkb and the set of relations that are often found between UW's (such as the information that tables are normally round or square, that are made of hard materials, etc.). In general, the difference between the UNLkb and the UNLeb is that the former is dictionary-based (i.e., it tries to represent the information that is normally ascribed in the definitions provided by dictionaries) whereas the latter is corpus-based (i.e., it tries to represent the concept as it appears in the corpus).
NL
- The NL Dictionary, or simply NLdic, is a list of natural language entries with the corresponding morphological and syntactic features (such as part of speech, gender, number, case, subcategorization frame, etc.).
UNL-NL
- The UNL-NL Dictionary, or simply UNL-NLdic, is list of systematic lexical mappings between UW's and natural language entries
- The UNL-NL Memory, or UNL Memory Base, or simply UNL-NLMB, is a list of mappings between UNL and a given natural language
The main difference between the UNL-NLdic and the UNL-NLMB is that the former involves only lexical units (i.e., entries defined as such in the UNL and the NL dictionaries) whereas the latter involves translation units, which may include several lexical units.
