Hi Shahnawaz,

XPP does not currently support tables within tables, coded as such in the XML.

I think other customers have implemented a workaround by creating an image of the embedded table and calling out that image in the parent table.

Other customers might have implemented other types of workarounds (such as "drawing" the parent or embedded table with custom macros and not with the table constructs).

Other customers might have other suggestions.

I hope you are able to figure out a way to achieve your desired results.

Another approach you could use that is pretty close in appearance, is to set it as a single table with row and column spanning. I mocked this up in DITA XML (shown in Oxygen) but it is a standard table model so it should render in XPP pretty much the same.

You could play with table rules to give the illusion of a table within a table. Here's my XML tagging:

Thanks Jay and John for your input

Let us know what you end up doing, Shahnawaz

Sure

Finally I splitted the table into three parts and achieve the output. 

Whatever works! There's almost always more than one way.