@devilgate Oh, I think you’re thinking of semantic HTML markup: using things like headers and sections in HTML. That’s fine, I have absolutely no issues with that. I use that all the time.
No, what I was talking about were brand new XML standards introduced by W3C (I think) to describe the relationship of things. Think, author A wrote book B which was published by publishing house P, etc. These subject-verb-object relationships were all encoded in a standard called RDF, using URL-based identifiers for each one: authors and publishers would use their website URL for their identifier, for example, and there would also be a URL to identify the verb “publish”. But how do you define the verb “publish”? For that you would using another new standard built atop this, like ontologies. But to define things in ontologies required yet another standard. And up, and up the pile of standards goes.
This was around the time that XML was also the rage — like XHTML, XFroms, XSLT, SOAP — before everyone came to their senses and said “that’s it, no more of these standards. HTML5 from here on out.”