Hi Rick,
Would've filed an issue, but the request is to post here first. (?)
Thanks. Many GitHub issues in the past were no bugs, but misunderstandings, so we are asking users to write to the list first.
Using version 9.1 BaseX app, a GZIP archive
https://nvd.nist.gov/feeds/json/cve/1.0/nvdcve-1.0-recent.json.gz of a JSON database can't be used to properly create a database. Interestingly, a ZIP archive https://nvd.nist.gov/feeds/json/cve/1.0/nvdcve-1.0-recent.json.zip works fine.
Do you really want to create a BaseX database from a "JSON database"? If yes, which format has this database?
Or does your archive contain a set of (tarred) JSON files, which you would like to import in BaseX as XML? Did you try to rename your file suffix to .tgz?
Best, Christian