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dependency vs association

 
Ranch Hand
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I am still not clear abt the difference between dependency and association.I have read that dependency is used to model a realtionship where changes to one party effect the other.If thats the case can "student uses the library" be modeled as a student---->library ??? in a college information application.Or will can it be modelled as an association?
That leads me to another question "is this distinction between dependency and association of any value?" in my analysis.
 
buckaroo
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Postgres Database
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Check this out. Also this response by Paul Wheaton and others over at Beginners.
HTH
 
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