Design Patterns discussion

["Hainer, Neil" <hainern AT jivanet.net>]

Hi,

I was wondering if someone could offer some advice regarding the best design 
strategy to use to handle the following situation:

I am using an off the self product that analyzes text documents and produces 
a results object, that I can output in XML and/or SGML. I need to output the 
results in another markup language called RDF. 

To product XML output, something quite similar to the following is done:

process input document producing vendor's results object

Writer xml_writer;

xml_writer.apply( results object, xml output file name);

I could create an RDF_Writer class that uses the same results object and 
outputs a file containing RDF statements.

But....

I know I will have to do the same thing for another vendor's document 
extraction product. That product will have its own unique results object and 
have unique method names.

So....

How can I design my code so I can re-use the RDF code with different vendor's 
results objects?

Thanks in advance,

Neil 


Neil Hainer
Booz Allen & Hamilton
JIVA System Integration Project
703-289-3881