Sony BDP-S280 - Manual (Page 18)

facility is invoked, then you must make a
good faith effort to ensure that, in the event
an application does not supply such function
or table, the facility still operates, and
performs whatever part of its purpose
remains meaningful.
(For example, a function in a library to compute
square roots has a purpose that is entirely welldefined
independent of the application. Therefore,
Subsection 2d requires that any applicationsupplied
function or table used by this function
must be optional: if the application does not
supply it, the square root function must still
compute square roots.)
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