what called mechanism science?

a lot programming languages frameworks do/allow/require something i can't seem name for, even nonetheless there substantially mechanism science. fundamentally bond variable/object/class/function name.

instance ("selectall()"):

<mx:button click="selectall()" label="select all"/>

instance ("price"):

<injectors target="{quotepanel}">
  <propertyinjector targetkey="price" source="{quotemanager}" sourcekey="currentprice" />
</injectors>

java instance ("foo"):

class.forname("foo")

there examples. idea. troubles me there probably proceed establish during compile-time, many ide assistance terms formula completion, navigation, refactoring. nonetheless that's besides point.

my doubt is, called? i don't cruise it's these: , ,

update: no, quiz, contemptible sounds one. it's simply matter "name song" programming.

update: answers helped:

• from tim lesher: it's called "late binding", "dynamic binding", "runtime binding". the fact binds twine only an doing detail...


• from konrad rudolph: ...it's simply quarrel an interpreter.

update: have justly separate out, examples late binding, reflection, runtime-evaluation (interpretation), etc. however, i interpretation there substantially name describes all. it's only garland examples have something common, nonetheless adequate give name. i favourite "everything string" answer, nonetheless even nonetheless it's funny, doesn't entirely probity either.