Family Tree or Hierarchy of Languages ?

[yaga]

Could somebody either point me to a web-site or create a family hierarchy of how HTML and all the other languages relate to each other? I hope you get what I mean. ?? What are the derivatives of each other?
HTML
-CSS
--XML ?
---PHP ?
---??? ??? others..etc :omg:

thanks in advance

[DCElliott]

Standard Generalized Markup Language (SGML) is the daddy. It was a way of describing how to mark up text for publishing (more info here: http://xml.coverpages.org/sgmlfaq-199904.txt ) Not specifcally a language itself - it described how the language needed to work. From those concepts we have HTML and its buttoned-down, straight-laced younger brother, XHTML. Extensible Markup Language (XML) is similar to SGML in that it describes a way to do markup that covers not only publishing information, but also data storage. There is a whole alphabet soup of related technologies ( XML, XSLT, XSL-FO, XPath, RSS, OWL, XTM).

The most important thing about all of them is that markup starts with a statement about what set of rules the markup needs to be interpreted against. After that, details of how the rules are to be interpreted (document type definition, namespaces and other information) are given. What follows then is a document that has strict opening, closing and nesting of nodes of information. This is something that all markup descendents of SGML have (although HTML was a lazy, naughty child who tried to cheat a lot).

Check out http://xml.coverpages.org/sgml.html as a starting point.

DE

[yaga]

exactly what I was looking for and unable to find
thanks, and thanks again