This class is useful for SEO tools such like:
1. Page content catcher including most important tag for an SEO like Meta Keywords, Title, H1 etc.
2. Page content analysis like how many links are there on page, how many 2 words keywords can be there on page
3. Most important is Page similarity checker. Which working for both linear and non linear comparison of pages.
With this tools you can test your site locally, which helps you to make everything perfect before putting them on web.
I wel come your suggestions and other enhancements @ firstname.lastname@example.org