Using HTML (Hyper Text Markup Language) was the first coding language used to design web pages. With that information in mind, we can now talk about HTML. So basically, it is a language used to create markup languages. It was also used for specifying the tagging elements within a document. So, SGML was not really a programming language in the sense that HTML and XML were, but it was a language for defining markup languages like both of the two mentioned. Now, going even further back, in order to properly talk about HTML, let’s talk about SGML (Standard Generalized Markup Language) for just a minute.
In order to understand XHTML, we need to talk about the two programming languages that came before it. In understanding the origins, you should be able to better grasp everything we are going to talk about.
For this reason, let’s start at the beginning and take you way back to the 1990s. In order to really understand XHTML, we first need to understand HTML and XML. Let’s dive into XHTML and take a look at everything you need to know. When do you need to use XHTML? How relevant is it still today? Does it have any bearing on SEO? What are the differences between XHTML and HTML5? These are all valid questions and ones we are going to look at together below.
