Can Custom Fields entered when an SDLXLIFF file was created be recovered at editing?

Hello,

We have a large number of SDLXLIFF files to edit. When those files were created, a number of Custom Fields were established for each one of them. Is that Fields’ information somehow recoverable so that, when editing with a different TM, we don’t have to reenter those Custom Fields for each SDLXLIFF file?

Thank you in advance for any help/suggestion you may offer.

Gilberto