I see, thanks for clarifying. As far as structure 1 theme per silo. You can have more than 1 silo on a site, which means you can have more that one theme kw. With each theme KW come many co-occurring kws that would be a part of articles/content that support the theme. Is the way I have understood theme-relevant-indexing. H
Yes this sounds practical. With unrelated i actually ment some closely related keywords without any content regarding it. If your site has that content then its not at all required to do that. Preffer to stick with your second statement. Or else it would be something like "Jack of all trades, Master of none." Better being master of only one!!!!!!