You can export Metadata from Data Catalog (see [Import and Export Data Catalog Metadata](https://community.denodo.com/docs/html/browse/8.0/en/vdp/data_catalog/administration/import_export/import_export#export-metadata)) with the following three options:
* GUI: *Administration > Import / Export > Export.*
* With the *export * scripts located at <DENODO_HOME>/tools/data-catalog.
* Using the REST API of the Data Catalog.
However all three methods leads to the same result and there's no option to exclude some metadata.
Since the metadata are stored as json file inside a zip file you could try edit the archive and delete the file you don't want to import in the second environment.
Hope this helps