This action retrieves and returns the names of the database catalogs.
<Data Source> (non-repetitive trigger [not required]): Name of data source to use
(if different from the default data source; see Connecting to an External Database).
<Catalogs> (repetitive exit [required]): The names of the catalogs in the database
(if working with HSQLDB, the default database embedded in the Tersus Studio, you'll get a single catalog "PUBLIC").
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