Lexica

Revision as of 17:35, 17 September 2012

The UNL System contains three different types of lexical databases: dictionaries, knowledge base and example bases.

Dictionaries

In the UNL System, a dictionary is a flat list of entries with their corresponding features. The dictionaries must comply with the structure defined in the Dictionary Specs and must contain only tags defined in the Tagset. They are normally provided through the UNLarium, and are divided in three different categories:

• The UNL Dictionary, or simply UNL^dic, is a list of UW's and their semantic (language-independent) features
• The NL Dictionary, or simply NL^dic, is a list of natural language entries with the corresponding morphological and syntactic (language-dependent) features
• The UNL-NL Dictionary, or simply UNL-NL^dic, is list of systematic lexical mappings between UW's and natural language entries

The UNL Dictionary and the NL Dictionary are monolingual databases, whose entries are interlinked by the UNL-NL Dictionary.

UNL Knowledge Base (UNL^KB)

The [UNL Knowledge Base], or UNL^KB, is a semantic network with relations that are necessary to define UW's. Differently from the UNL Dictionary, which brings only very general semantic features (such as lexical category, semantic class, abstractness, cardinality, etc.), the UNL^kb contains relations between UW's.

Example Bases

In the UNL System, there are two different types of example bases:

• The UNL Example Base, or simply UNL^eb, is a network with any relations between UW's
• The UNL-NL Memory, or UNL Memory Base, or simply UNL-NL^MB, is a list of mappings between UNL and a given natural language