Help need using

First forgive me for not digging into documentation, but I'm not a regular expression expert.

I need to perform a simple string parse, to get parameters separeted by white space (or tabs) with unknown count.

I reached to this:

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> *SQL> select regexp_substr ('Param1 Param2 Param3','[[:graph:]]+', 1,
> rownum) Parameter 2 from dual 3 connect by level <= 3 4
> /PARAMETER--------------------------------------------------------------------------------Param1Param2Param3*

But I need to consider, in special case, a group of words, enclosed with double quotes, as a single parameter.

But, of course, this will not work:

> *SQL> select regexp_substr ('Param1 "Param2 Param3"','[[:graph:]]+', 1,
> rownum) Parameter*
> * 2 from dual*
> * 3 connect by level <= 3** 4 /*
>
> *PARAMETER*
>
> *----------------------------------------------------------------------------------------*
> *Param1*
> *"Param2**Param3"*

How can I get the following output:

> *PARAMETER*
>
> *----------------------------------------------------------------------------------------*
> *Param1**"Param2 Param3"*

Best regards,
Luis Santos