プログラミング言語の構文定義や静的解析ツールの作成には、

　私たちの世界を動かすプログラムは事実上すべて，人間がPythonやJava，Cなどの高級プログラミング言語で記述し，それをコンパイルして低レベルのコードにまとめて実行する．現代のプログラミング言語のためのコンパイルを行う技術，すなわち，コンパイラの多くは，Alfred V. AhoとJeffrey D. Ullmanの貢献が大きく，それにより2020年度に，コンピュータ科学の最高峰のチューリング賞を受賞した [1]．コンパイラでは字句解析，

ディスカッションマイニングとは，会議における活動を複数メディアで記録し，そこから再利用可能な知識を抽出するための技術である．音楽理論とは，音の時系列を

構文情報を考慮する機械翻訳手法である統語ベース翻訳では，

構文構造の表現形式は様々存在しており，異なる表現形式を採用する

A natural language understanding system is described which extracts syntactical and semantic information from Japanese newspaper articles. The understanding system parses and understands the input sentences and constructs an intermediate representation in CRS(Contextual Representation Structure)which is independent from the specific languages. The system employes a syntactic analyzer and semantic analyzer. These analyzers operate in a serially lntegrated fashion. The syntactic analyzer(context free grammar parser)analyzes the input sentences and obtains the parsing trees. Since the phrase order in a clause is grammatically unrestricted in Japanese sentences, and since, unlike in English, positional information regarding phrases is usually no help in establishing their relation, the Japanese analyzer is unable to determine phrase relations. So, this Japanese analyzer extracts an rough sketch of a structure of the sentences and the semantic relations between words are determined in the next semantic process. The syntactic structure adopts the right recursive tree structure to represent this Japanese unrestricted construction. This tree structure contains the all ambiguity in the syntactic analysis. From an analysis of these, in turn, the semantic analyzer obtains word-level semantic structures. The semantic analyzer constructs a semantic structure for each phrase. Each word meaning shares a suitable position in the hierarchy of concepts. In this system, a word meaning written in the lexical entry plays an important role in semantic analysis. The interaction between the word meanings enables the check if a word can be embedded in the slot in the other word. If the check is satisfied, the analyzer embeds the word in a suitable slot in the other word. The modifying ralations inside noun phrases and the case realtions among verbs and noun phrases are determined in the word-level semantic structure.