It would great if client application had understanding of context rather than blindly performing layout or having fragile scripts which scrape content. Today, i

It would great if client application had understanding of context rather than blindly performing layout or having fragile scripts which scrape content. Today, if you access an ecommerce website and retreive a page which describes one or more products then your browser only obtains HTML for layout. The number of products and the fields are not apparent to the software. If the content was explicit then you could do more. For example, you could have a client which could switch to product thumbnails. You could have clients or servers performing meaningful price comparisons on more products. For event listings, information could be added to calendar software more easily. For social networking, contacts could be added more easily. The central idea with semantic web is that layout isn't the final use of information.