Web Realted Tools and Technologies

What XHTML is
HTML is not case sensitive, but the new XHTML that makes HTML compliant with XML is, and needs to be lowercase. Unlike HTML, XHTML needs /end tags for every tag. For HTML tags that don't have end tags, you can use space /. I'll figure out what XML is good for later, all I know is that XML somehow helps the web use differt kinds of documents.