Thuật ngữ AI
Từ điển đầy đủ về Trí tuệ nhân tạo
Syntactic parsing
Algorithmic process of grammatical analysis that decomposes a sentence into its structural constituents to extract formal syntax. This operation identifies hierarchical relationships between words and word groups according to the rules of a grammar.
Syntactic tree
Tree representation of the grammatical structure of a sentence where nodes correspond to syntactic constituents and branches to dependency relationships. This hierarchical structure visualizes the organization of words into phrases and sentences according to grammatical rules.
Dependency analysis
Syntactic analysis approach that models grammatical relationships as direct dependencies between words, without the concept of intermediate constituents. This method identifies head-dependent relationships to represent syntactic structure in a flat manner.
Constituent analysis
Syntactic analysis method that decomposes sentences into hierarchical constituents such as noun, verb, and prepositional phrases. This approach based on constituency grammars identifies nested relationships between word groups.
Part-of-speech tagging
Process of automatically assigning grammatical tags to each word in a text such as noun, verb, adjective or determiner. This morphosyntactic annotation constitutes an essential preliminary step for complete syntactic analysis.
Noun phrase
Syntactic constituent centered around a main noun and possibly including determiners, adjectives or noun complements. This grammatical unit forms a coherent group functioning as a single element in sentence structure.
Head-dependent relationship
Fundamental syntactic link in dependency analysis where a word called the head governs one or more dependents in sentence structure. These directional relationships capture essential grammatical connections between discourse elements.
Parser
Computer program implementing algorithms to perform grammatical analysis of sentences according to formal linguistic models. These parsers can use rule-based, statistical or neural approaches to build syntactic structures.
Context-free grammar
Formal grammatical system where production rules apply independently of the context of non-terminal symbols, widely used in syntactic analysis. This Type 2 model in the Chomsky hierarchy effectively describes the structures of many natural languages.
Phrase constituent
Syntactic unit forming a coherent segment of a sentence with a specific grammatical function such as subject, object complement or attribute. These constituents can be simple or complex and nest to form the complete hierarchical structure.
Tree depth
Metric measure indicating the maximum number of hierarchical levels in a syntactic tree, reflecting the structural complexity of the sentence. This characteristic often influences the difficulty of analysis and the performance of parsing algorithms.
Surface analysis
Level of syntactic analysis focusing on observable grammatical structure without interpreting the deep semantic meaning of utterances. This approach treats syntactic form as a formal system independent of semantic interpretation.
Syntactic projection
Mechanism by which the lexical properties of a syntactic head determine the structure and characteristics of its direct dependents. This fundamental principle explains how grammatical categories hierarchically organize sentences.
Structural ambiguity
Phenomenon where the same sequence of words can receive different syntactic analyses, creating alternative tree structures. This ambiguity represents a major challenge for automatic parsing systems and requires disambiguation strategies.
Constituent boundary
Position in a sentence where a syntactic constituent ends and another begins, marking the limits of grammatical units. Precise identification of these boundaries is crucial for correct syntactic analysis.
Postagging
Abbreviation of Part-of-Speech tagging referring to the automatic process of annotating words with their respective grammatical categories. This preliminary step provides essential information for more complex syntactic analyses.
Hierarchical structure
Organization in nested levels of syntactic constituents reflecting the relationships of dominance and subordination in the sentence. This tree-like structure represents how grammatical elements combine to form increasingly complex units.