synchronize meta data

[Maka]

Hi,

Here is the situation:
I have got files with metadata let call them files A with meta data A
When I edit them throughout  various softwares they add new meta data infos.
then files A are transformed into B and have new metadata data A+B

is it possible to synchronize meta data so my new files B will have just the original metadata inside (metadata A) nothing more nothing less ?
is there a command to do that ?

Cheers

[Phil Harvey]

You could try this:

exiftool -all= -tagsfromfile A -all:all B

- Phil