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Computer Integration Engineering Design and Production A National Opportunity (1984) / Chapter Skim
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Glossary
Pages 59-62

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From page 59...
... in a manufacturing enterprise occurs when: · all the processing functions and related managerial functions are expressed in the form of data, · these data are in a form that may be generated, transformed, used, moved, and stored by computer technology, and · these data move freely between functions in the system throughout the life of the product, with the objective that the enterprise as a whole have the information needed to operate at maximum effectiveness.
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From page 60...
... The data in a data base are accessed and manipulated by computer programs using a particular set of commands understood by the data management system. These are collectively referred to as the Data Manipulation Language or DML.
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From page 61...
... Relational -- In this model, the different files in a data base are viewed as tabular two-dimensional matrices of "flat files," with the rows of a matrix as the records in a file and the columns as the data fields within the records. Relationships may be materialized dynamically between any two files that contain a common data field that can be used to relate the individual records in one to the individual records in the other.
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From page 62...
... Multilevel Schema A multilevel schema permits data descriptions of the contents of a data base to be expressed at multiple levels of abstraction. Thus at one level, the description may show many disjoint types of records that would need to be addressed as separate units by a program using that particular level of schema.
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Key Terms

  • data relationships
  • record types
  • data models
  • multilevel schema
  • record type

  • central resource
  • raising aerospace
  • widespread application
  • move freely
  • data move

  • enterprise occurs
  • force program
  • structured according
  • programs using
  • data fields

  • manufacturing data
  • aerospace productivity
  • usually implies
  • product definition
  • user program

  • manufacturing program
  • data manipulation
  • centralized control
  • model defines
  • batch manufacturing

  • program perceives
  • commands understood
  • manage information
  • users accessing
  • permits data


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