用作描述符的一種字、符號或數,用于從某一集合中,特別是從某一配位標引系統中檢索信息
A word, symbol, or number used as a descriptor for retrieval of information from a collection, especially in a coordinate indexing system.
一種自動(dòng)準備索引(自動(dòng)標引)的方法。
An automatic means to prepare an index.