UConDB Client Command Line Interface
------------------------------------

.. code-block:: shell

    $ ucondb [-s <server URL>] <command> ...

        -s <server URL>                     -- URL of the UConDB server. 
                                               Env. variable UCONDB_SERVER_URL can be used.
    
        Commands:

            version                                       -- print server version information

            folders or ls                                 -- list folders

            objects or ls <folder>                        -- list objects in folder

            versions or ls [-t] [-j] <folder> <object>    -- list object versions
                -j                      -- JSON output for "versions"
                -t                      -- print Tv as date/time

            get <folder> <object> [get options] -- get object version metadata or data
                -m                      -- get metadata, print to stdout
                -k <key>                -- version key
                -i <id>                 -- version id
                -t <numeric>            -- version validity time, default = now
                -T <tag>                -- tag
                -R <numeric>            -- version which existed as of record time, default = now
                -o <output file>        -- output for the version data BLOB, otherwise - stdout

            put -u <username>:<password> [options] (<data file>|-) <folder> <object>
                -k <key>                -- version key
                -t <numeric>            -- version validity time, default = 0
                -T <tag>[,...]          -- tags