Change the declarative markup story

Liam Quin wrote:

> Thinking has to change around the 
> declarative markup story and around 
> data and knowledge representation. 
> In particular, we need to build systems 
> that help information to cross 
> representational boundaries.

That is fascinating Liam. Would you expand on this a bit, please? 

What do you mean when you say that we need to "change around the markup story"? 

What do you mean by "cross representational boundaries"?

/Roger