How to use 'parameter' attribute of the action tag.?

[Suriyanarayanan, Senthil Kumar]

Hello,
        How do I use the parameter attribute of the action tag. The
struts-config_1_0.dtd says, action tag takes
parameter attribute as..

     parameter       General purpose configuration parameter that can be
used
                     to pass extra information to the Action selected by
this
                     mapping.

        I would like to how to mention in struts-config.xml and refer it in
the perform method of the action.

        Any help would be appreciated.

Thanks
Senthil Kumar.S
 
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