Download Beginning XML (4th Edition) by Jon Duckett, Andrew Watt, Danny Ayers, Eric Van Der Vlist, PDF

By Jon Duckett, Andrew Watt, Danny Ayers, Eric Van Der Vlist, Joe Fawcett, David Hunter, Jeff Rafter, Linda McKinnon

While the 1st variation of this e-book used to be written, XML used to be a comparatively new language yet already gaining floor quick and turning into increasingly more general in an unlimited variety of functions. by the point of the second one variation, XML had already confirmed itself to be greater than a passing fad, and was once in truth getting used through the for a really wide selection of makes use of. With the 3rd version, it was once transparent that XML used to be a mature know-how, yet extra very important, it turned obvious that the XML panorama was once dividing into numerous components of workmanship. Now during this version, we wanted to categorize the expanding variety of necessities surrounding XML, which both use XML or offer performance as well as the XML center specification.So what's XML? It's a markup language, used to explain the constitution of knowledge in significant methods. at any place that information is input/output, kept, or transmitted from one position to a different, is a possible healthy for XML's services. probably the main recognized purposes are web-related (especially with the most recent advancements in hand held internet access--for which a number of the expertise is XML-based). even if, there are various different non-web-based functions for which XML is useful--for instance, in its place for (or to enrich) conventional databases, or for the move of economic details among companies. information businesses, besides participants, have additionally been utilizing XML to distribute syndicated information tales and web publication entries.

This ebook goals to educate you all you must learn about XML--what it truly is, the way it works, what applied sciences encompass it, and the way it could possibly top be utilized in various events, from uncomplicated info move to utilizing XML on your web content. It solutions the basic questions:

* what's XML?

* How do you utilize XML?

* How does it work?

* What are you able to use it "for," anyway?

This ebook is for those that recognize that it might be a fantastic proposal to benefit XML yet aren't one hundred pc convinced why. You've heard the hype yet haven't obvious sufficient substance to determine what XML is and what it could actually do. you can be utilizing improvement instruments that attempt to disguise the XML at the back of person interfaces and scripts, yet you must comprehend what's particularly occurring behind the curtain. you'll already be by some means interested in internet improvement and possibly even recognize the fundamentals of HTML, even supposing neither of those skills is really worthwhile for this book.

What you don't want is wisdom of markup languages normally. This ebook assumes that you're new to the idea that of markup languages, and now we have dependent it in a fashion that are supposed to make feel to the newbie and but quick carry you to XML specialist status.

The be aware "Beginning" within the name refers back to the form of the e-book, instead of the reader's event point. There are kinds of newbie for whom this e-book is ideal:

* Programmers who're already conversant in a few net programming or information alternate ideas. Programmers during this type will already comprehend a number of the suggestions mentioned right here, yet you are going to find out how you could contain XML applied sciences to reinforce these ideas you presently develop.

* these operating in a programming setting yet without massive wisdom or adventure of internet improvement or info trade purposes. as well as studying how XML applied sciences should be utilized to such purposes, you'll be brought to a few new strategies that can assist you know how such platforms work.

The matters lined during this e-book are prepared to take you from amateur to specialist in as logical a way as lets. This Fourth version is established in sections in keeping with a number of parts of XML services. until you're already utilizing XML, you want to commence by way of analyzing the creation to XML partly I. From there, you could quick leap into particular parts of craftsmanship, or, in case you desire, you could learn throughout the ebook so as. remember that there's an excessive amount of overlap in XML, and that many of the sections utilize ideas defined in different places within the book.

* The e-book starts off through explaining what precisely XML is and why the felt language like this was once needed.

* After masking the "why," the subsequent logical step is the "how," so it exhibits you the way to create well-formed XML.

* when you comprehend the whys and hows of XML, you'll move directly to a few extra complex belongings you can do while developing your XML records, to lead them to not just good shaped, yet legitimate. (And you'll examine what "valid" quite means.)

* After you're pleased with XML and feature obvious it in motion, the e-book unleashes the programmer inside and appears at an XML-based programming language that you should use to remodel XML files from one layout to another.

* ultimately, it is important to shop and retrieve XML info from databases. At this aspect, you'll research not just the cutting-edge for XML and databases, but additionally find out how to question XML info utilizing an SQL-like syntax known as XQuery.

* XML wouldn't fairly be beneficial until you may write courses to learn the knowledge in XML files and create new XML files, so we'll come again to programming and examine a few ways in which you are able to do that.

* realizing the way to application and use XML inside your personal enterprise is something, yet sending that details to a enterprise accomplice or publishing it to the net is one other. You'll know about applied sciences that use XML that aid you ship messages around the net, submit details, and observe companies that offer information.

* because you have all of this knowledge in XML structure, it might be nice in the event you may well simply show it to humans, and it seems you could. You'll see an XML model of HTML referred to as XHTML. You'll additionally examine a expertise you could already be utilizing along side HTML files referred to as CSS. CSS permits you to upload visible types in your XML records. additionally, you'll how you can layout beautiful snap shots and make interactive types utilizing XML.

* ultimately, the ebook ends with a case learn, which can assist to provide you rules approximately how XML can be utilized in real-life occasions, and that could be utilized in your individual applications.

This ebook builds at the strengths of the sooner variations, and gives new fabric to mirror the alterations within the XML landscape--notably XQuery, RSS and Atom, and AJAX. Updates were made to mirror the latest types of standards and most sensible practices through the booklet. as well as the numerous adjustments, each one bankruptcy has a collection of workout inquiries to try your figuring out of the cloth. attainable strategies to those questions seem in Appendix A.

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Extra info for Beginning XML (4th Edition)

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Programming books tend to introduce the subject as if you will be writing all of your work from scratch. This isn’t true. The success of any new application is strongly impacted by what third-party libraries or APIs are used to create it. I spend a vast amount of time up front researching available options and trying to figure out which one will maximize the effectiveness of my app. For any given problem that you need to solve, search the Web to see what existing libraries are available. Programmers hate duplicating work, and you’ll find most tasks Populating the Search Result List | 27 have already been completed!

Example 4-5 summarizes the new method added to the AddLo cationForm class. 50 | Chapter 4: Iterative Development Example 4-5. args_converter method on AddLocationForm def args_converter(self, index, data_item): city, country = data_item return {'location': (city, country)} All it does is set a location property on the button. However, LocationButton doesn’t have a location property, so we’ll alter that next. You’ll want a ListProperty, so adjust your imports first, as shown in Example 4-6. Example 4-6.

It’s still trying to update the default class on a ListView, called a SimpleListAdapter. This is easily remedied, as shown in Example 3-5. Example 3-5. _trigger_reset_populate() You can’t just set the data to an empty list because the container involved is an instance of ObservableList. Instead, clear the list… …and then extend it with the new data. ListView Adapters | 37 ListAdapter is supposed to update the display when it sees the data change, but it’s not doing its job, so you should force an update here.

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