I have tried following steps:

C:\Srikumar\Software\BaseX\BaseX941\basex>java -Dorg.basex.DEFAULTDB=true -cp basex.jar org.basex.BaseX -c"get DEFAULTDB"
DEFAULTDB: true

C:\Srikumar\Software\BaseX\BaseX941\basex>cd bin

C:\Srikumar\Software\BaseX\BaseX941\basex\bin>basex
BaseX 9.4.1 [Standalone]
Try 'help' to get more information.

> XQUERY for $article in doc('6301904f80000114/0601904f80007547.xml') return $article
Stopped at ., 1/20:
[FODC0002] Resource 'C:/Srikumar/Software/BaseX/BaseX941/basex/bin/6301904f80000114/0601904f80007547.xml' does not exist.

> XQUERY db:system()//defaultdb
<defaultdb>false</defaultdb>
Query executed in 37.99 ms.
> exit
See you.

Thanks,
Srikumar

From: Christian Grün <christian.gruen@gmail.com>
Sent: Friday, August 21, 2020 4:24 PM
To: Srikumar Choudhury <schoudhu@opentext.com>
Cc: basex-talk@mailman.uni-konstanz.de <basex-talk@mailman.uni-konstanz.de>; Nikhil Sethi <nsethi@opentext.com>
Subject: Re: [EXTERNAL] - Re: Error: Stopped at ., 1/20: [FODC0002] Resource 'C:/Srikumar/Software/BaseX/BaseX941/basex/bin/6301904f80000114/0601904f80007547.xml' does not exist.
 
>                I have tested below code but it is not working.
>
> System.setProperty("org.basex.DEFAULTDB", "true");
> XQDataSource xqs = new BaseXXQDataSource();

What do you get if you run the following XQuery expression?

  db:system()//defaultdb