https://www.samba.org/samba/docs/4.13/man-html/vfs_nfs4acl_xattr.8.html
vfsxattr
https://www.ibm.com/docs/en/ste/10.1.2?topic=commands-extended-attributes-xattr-xattr
Use the -XATTR name=value[,name=value]* command to specify extended input and output attributes.
extended attributesxattr
https://eclecticlight.co/xattred-sandstrip-xattr-tools/
xattred – full-featured extended attribute editor, can also add quarantine xattrs Updated! xattred lets you inspect and edit all extended attributes...
metamerampxattrtoolseclectic
https://www.samba.org/samba/docs/4.0/man-html/vfs_xattr_tdb.8.html
vfsxattrtdb