自由语言环境项目的初步结果

D. Cavar, Lwin Moe, Hai Hu, K. Steimel
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引用次数: 2

摘要

自由语言环境(FLE)项目的重点是开发一个开放和免费的自然语言处理函数库和一个用于词法功能语法(LFG)和相关语法框架的语法工程平台。在其目前的状态下,FLE的代码库包含了lfg解析的基本要素。它使用基于有限状态的形态学分析器和语法统一分析器来生成基于语法的输入句子的解析树和相关的功能表示。它可以处理各种语法形式,这些形式可以独立使用,也可以作为LFG解析器的主干。在支持的形式化中有上下文无关语法(CFG)、概率上下文无关语法(PCFG)以及xlegrammar形式化的所有形式语法组件。lfg解析器的当前实现包括使用PCFG主干对概率结构建模的可能性。它还包括f结构表示,允许规范或计算完整结构表示的概率,以及f结构树中的子路径。鉴于这些设计特征,FLE能够为输入或输出句子提供各种形式的c结构和f结构概率建模,这超出了基于LFG框架的其他技术的能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preliminary results from the Free Linguistic Environment project
The Free Linguistic Environment (FLE) project focuses on the development of an open and free library of natural language processing functions and a grammar engineering platform for Lexical Functional Grammar (LFG) and related grammar frameworks. In its present state the code-base of FLE contains basic essential elements for LFG-parsing. It uses finite-state-based morphological analyzers and syntactic unification parsers to generate parse-trees and related functional representations for input sentences based on a grammar. It can process a variety of grammar formalisms, which can be used independently or serve as backbones for the LFG parser. Among the supported formalisms are Context-free Grammars (CFG), Probabilistic Contextfree Grammars (PCFG), and all formal grammar components of the XLEgrammar formalism. The current implementation of the LFG-parser includes the possibility to use a PCFG backbone to model probabilistic c-structures. It also includes f-structure representations that allow for the specification or calculation of probabilities for complete f-structure representations, as well as for sub-paths in f-structure trees. Given these design features, FLE enables various forms of probabilistic modeling of c-structures and f-structures for input or output sentences that go beyond the capabilities of other technologies based on the LFG framework.
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