Beginning XML by David Hunter

By David Hunter

Extensible Markup Language (XML) is a quickly maturing expertise with strong real-world functions, relatively for the administration, show, and delivery of knowledge. including its many comparable applied sciences, it has develop into the traditional for information and rfile supply on the internet. This booklet teaches you all you must find out about XML - what it really is, the way it works, what applied sciences encompass it, and the way it could possibly most sensible be utilized in numerous occasions, from uncomplicated information move to utilizing XML on your websites. It builds at the strengths of the 1st version, and gives new fabric to mirror the alterations within the XML panorama - particularly cleaning soap and net companies, and the ebook of the XML Schemas suggestion via the W3C. who's this booklet for? starting XML, second version is for any developer who's drawn to studying to take advantage of XML in net, e-commerce, or info garage purposes. a few wisdom of mark up, scripting, and/or item orientated programming languages is useful, yet now not crucial, because the foundation of those ideas is defined as required. What does this booklet hide? * XML syntax and writing well-formed XML * utilizing XML Namespaces * remodeling XML into different codecs with XSLT * XPath and XPointer for finding particular XML info * XML validation utilizing DTDs and XML Schemas * Manipulating XML records with the DOM and SAX 2.0 * cleaning soap and internet companies * showing XML utilizing CSS and XSL * Incorporating XML into conventional databases and n-tier architectures * XLink for linking XML and non-XML assets

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All of the information from the start of a start-tag to the end of an end-tag, and including everything in between, is called an element. So:  is a start-tag  is an end-tag  John is an element The text between the start-tag and end-tag of an element is called the element content. The content between our tags will often just be data (as opposed to other elements). In this case, the element content is referred to as Parsed Character DATA, which is almost always referred to using its acronym, PCDATA, or with a more general term such as "text content" or even "text node".

Note> Attributes are Un-Ordered The order of attributes is considered irrelevant. Hence, sometimes you may need to use elements, rather than attributes, for information that must come in the document in a certain order. Why Use Attributes When Elements Look So Much Better? I Mean, Why Use Elements When Attributes Look So Much Better? Many people have different opinions as to whether attributes or child elements "look better". In this case, it comes down to a matter of personal preference and style.

Also, because there are other technologies built around XML, we can create applications that are as complex or simple as our situation warrants. Much of the power that we get from XML comes from the rigid way in which documents must be written. In the next chapter, we'll take a closer look at the rules for creating well-formed XML. < Free Open Study > This document is created with the unregistered version of CHM2PDF Pilot < Free Open Study > Chapter 2: Well-Formed XML Overview We've discussed some of the reasons why XML makes sense for communicating data, so now let's get our hands dirty and learn how to create our own XML documents.

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