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| Week 6 - DTDs  | Document Type Declarations are the definitions of XML documents. Don't forget, if you miss a lesson you can have it resent to you. | | | Syllabus | Week 6
- What is a DTD?
- DTDs and Valid XML
- Elements and Attributes in a DTD
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| | Document Type Declarations and Definitions | What is a DTD?
When you write HTML with some editors, you'll notice that there is this strange line written across the top: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> While you may not know what it is, it still serves a purpose, and with XML that line of code is required to write a well-formed document.
| DTDs and Valid XML
A DTD is the grammar of an XML page. It is an acronym that stands for Document Type Definition. It contains the elements, attributes, entities, and notations used in the XML document.
| Elements and Attributes in a DTD
Elements, entities, attributes and notations are the building blocks of a DTD. Once you understand what each of these are, you can easily write your own DTD and be on your way to writing XML applications.
| | Class Notes | Get the Lessons
This is a self-paced class. This means that if you need more time than a week to review the lessons, that is fine. And if you finish the lessons before the next week, you can request the next lesson.
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