翻訳と辞書
Words near each other
・ data encryption key
・ data encryption standard
・ data flow
・ data flow analysis
・ data flow diagram
・ data fork
・ data frame
・ data general
・ data general mn601
・ data glove
data hierarchy
・ data interchange standards association
・ data jack
・ data link connection identifier
・ data link layer
・ data link level
・ data link provider interface
・ data link switching
・ data logger
・ data logging


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data hierarchy : FOLDOC
data hierarchy
The system of data objects which provide the methods for information storage and retrieval. Broadly, a data hierarchy may be considered to be either natural, which arises from the alphabet or syntax of the language in which the information is expressed, or machine, which reflects the facilities of the computer, both hardware and software.
A natural data hierarchy might consist of bits, characters, words, phrases, sentences, paragraphs, and chapters. One might use components bound to an application, such as field, record, and file, and these would ordinarily be further specified by having {data descriptors} such as name field, address field, etc. On the other hand, a machine or software system might use bit, byte, word, block, partition, channel, and port.
Programming languages often provide types or objects which can create data hierarchies of arbitrary complexity, thus allowing software system designers to model


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