'Save Metadata to File' is not the same as Export. This sounds like Keyword Synonyms are not part of the standard XMP metadata.
In fact it works !!!
Thank you very much man. It's still weird to me that hierarchical keywords are exported when I do save metadata to file but not the synonyms.
Have a good day,
It's still weird to me that hierarchical keywords are exported when I do save metadata to file but not the synonyms.
There's a good reason for this in the current LR design. You can do Save Metadata To File, remove the photo from the catalog, and then import the photo, and it will have the same metadata.
But if Save Metadata To File wrote synonyms to the file as top-level keywords like Export does, then when you re-imported the file, the synonyms would get read in as top-level keywords, not as synonyms. Many people have complained about that behavior with Export: Lightroom: Better handling of exporting and reimporting keyword synonyms | Photoshop Family Customer Community . Industry standards don't specify how to record synonyms in metadata, but I made a suggested for how to do so using Adobe's proprietary XMP:HierarchicalSubject field (my proposal has been ignored by Adobe, not surprisingly).