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・ Path 27
・ Path 46
・ Path 61
・ Path 62
・ Path 64
・ Path 66
・ Path analysis
・ Path analysis (computing)
・ Path analysis (statistics)
・ PATH Biobank
・ Path coefficient
・ Path coloring
・ Path computation element
・ Path cover
・ Path dependence
Path expression
・ Path Finder
・ Path Finder (Transformers)
・ PATH Foundation
・ Path Grant Deed
・ Path graph
・ Path Head Watermill
・ Path integral
・ Path integral formulation
・ Path integral molecular dynamics
・ Path integral Monte Carlo
・ Path integrals in polymer science
・ Path integration
・ Path length
・ PATH Lift Bridge


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Path expression : ウィキペディア英語版
Path expression

In query languages, path expressions identify an object by describing how to navigate to it
in some graph (possibly implicit) of objects. For example, the path expression ''p''.Manager.Home.City might refer the city of residence of someone's manager.
Path expressions have been extended to support regular expression-like flexibility.
XPath is an example of a path expression language.
In concurrency control, path expressions are a mechanism for expressing permitted sequences of execution. For example, a path expression like " , write" might specify that either multiple simultaneous executions of read or a single execution of write but not both are allowed at any point in time.
==See also==

* Object database

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Path expression」の詳細全文を読む



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