[alimea]

Hi all
I want to know about IOobject and objectRegistry. I have searched a lot about it but I didn't find out it completely!
just I know that IOobject is a class for input/output variables!
e.g. that is used for Reading T in createFields.H .
what is IOdictionary ?
what mesh is used in arguments ?


IOdictionary transportProperties
(
IOobject
(
"transportProperties",
runTime.constant(),
mesh,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
);

I will be thankfull if explain for me about it.