Chapter 4: XML Part II

Namespaces

• Default: default.xml
• Explicit: explicit.xml

DTDs: Document Type Definitions

• Internal: internal.xml
• External: course.dtd and cs480.xml

Element Declarations

• <!ELEMENT name EMPTY>
• <!ELEMENT name (#PCDATA)>
• ()
• ,
• ?
• *
• +
• |
• Mixed Content: <!ELEMENT name (#PCDATA | element | ... )* >

Examples: demo.xml and demo.dtd

Attribute Declarations

• <!ATTLIST element-name attribute-name attribute-type default-value ... >
• attribute-type: CDATA
• default-value: "some default"
• default-value: #REQUIRED
• default-value: #IMPLIED
• default-value: #FIXED "value"

Validation

• W3C
• local HTML validation

Thursday Exercise

John will give you a well-formed XML file. During lab, you should construct an internal DTD to go with this file, such that the file validates. Copy your solution onto John's memory stick when you are finished. 5 points.

Friday Exercise

John will give you an HTML file that you must convert into an equivalent XHTML Strict file that validates. Copy your solution onto John's memory stick when you are finished. 5 points.