Have just completed a site and it is coded with DTD HTML strict 1.0.

So I want to add some search engine information for search results and customer information.

Google and Schema.org have this markup called Micro data and it looks as if it might be of some use to my site in assisting search results and customer information.

But my site is XHTML 1.0 strict.

Why is such strict a content based markup left only for HTML 5?

How come XHTML 1.0 strict is left out?

How do I get around this issue and add Microdata to my XHTML strict 1.0 pages?

Dan