As I explained at the end of the last article. You create a Document Type to define the rules that must be followed in your XML Markup. A DTD defines what elements are required and what attributes can be set and what their potential values can be.

Every DTD must start with the line <?xml version=”1.0” encoding=”UTF-8” standalone=”no”?>. This tells the processor that this is an XML version 1.0 file. The character encoding used is of type UTF-8. And, that no external file is required for this document to work.

Also make sure that when you are creating DTD’s that !ELEMENT, !ATTLIST, #REQUIRED, #PCDATA, #CDATA, etc. are all capitalized.

There you are all up to speed. Now on to DTD Prologs… Continue reading Learn XML Document Type Definition’s →

In this tutorial I’ll continue to cover XML and all of it’s capabilities. XML stands for eXtensible Markup Language. I hope you got this one point from the last XML Article. XML does one thing really well. It organizes and classifies your data, so that it is useable by a wide range of devices and software packages!

In this article I’ll explain how XML influenced HTML, to create the newest version of HTML called XHTML. I’ll then explain what well formed XML is and Document Type Definition’s (DTD).

Continue reading Learn XML eXtensible Markup Language Pt 2 →