By Sas Jacobs

XML has been round for a few years, so what makes this ebook diversified? good, most of the opponents in the market are huge tomes; this booklet assumes a unique process, displaying that you should provide the reader all they should be aware of to hit the floor operating, with no making them trawl via hundreds of thousands of pages of syntax. The booklet additionally supplies the main updated photograph of the topic—XML help within the latest internet browsers, developing XML-driven purposes utilizing the main models of net criteria and server-side languages, together with CSS 2.1/3, DOM, XSLT and XPath 2, Hypertext Preprocessor five, ASP.NET 2, and lots of extra. ultimately, the ebook offers an creation to Ajax-style programming, that is an important subject for contemporary net builders to appreciate. XML is middle to Ajax, so an figuring out of it's crucial whilst studying tips on how to software Ajax performance. This publication as a result presents a very good stepping stone for readers wishing to take this course.

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An XML document that complies with a DTD is called a document instance of that DTD. This book isn’t intended as a complete reference to DTDs, but it includes enough information so you can understand how to construct a DTD. dtd with your resources. xml, but the name isn’t significant. This DTD shows two types of declarations: one for declaring elements and the other for attributes. You can also add entity and notation declarations. Notation declarations are uncommon, so I’ll cover only entity declarations later in the “Entity Declarations” section.

The only requirement is that it’s unique in the XML document. However, many processors, including XML schema, XHTML, and XSLT processors, use the URI to indicate CHAPTER 2 ■ RELATED XML RECOMMENDATIONS that they must process certain parts of the document. Therefore, you must use the correct URI for these applications. org/TR/ REC-xml-names/. Adding Namespaces to XML Documents You reference a namespace by adding it as an attribute of any node that contains elements belonging to the namespace. Frequently, you add the namespace to the document element, because it contains all other elements.

It would be entirely possible to include another child element, also called id, within this element. The most common type of attribute is CDATA, but you can declare other types as well: • ID: a unique identifier • IDREF: the ID of another element • IDREFS: a list of IDs from other elements • NMTOKEN: a valid XML name • NMTOKENS: a list of valid XML names • ENTITY: an entity name • ENTITIES: a list of entity names • LIST: a list of specified values The keyword #REQUIRED indicates that you must include this attribute.

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