What is the use of hsqldb-ds.xml in jboss

Hi Guys,
What is the use of hsqldb-ds.xml in jboss deploy folder
i have my ds file atg_ds.xml in same folder how it will identify our ds file

Oracle ATG Web Commerce - Configuring Databases and Database Access
Quoting from link:
JBoss comes with its own demo database, Hypersonic (note the datasource hsqldb-ds.xml in the /deploy directory).
I am not sure how it's working in ur case.
Thanks,
Nitin.

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What is the use of hsqldb-ds.xml in jboss

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