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XML stands for Extensible Markup Language and is a text-based markup This tutorial will teach you the basics of XML. .. Processing Instructions Rules. „XML is the cure for your data exchange, information integration, data pdf">. A . Comments and processing instructions may not appear inside tags. nvrehs.info XML File Format. O.e. Technical Reference Manual. Version 2. December 2ee2. Sun Microsystems, Inc. 9eO San Antonio Road. Palo Alto, CA.
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A valid document, then, is nothing more then a well-formed document that adheres to its DTD. The question then becomes, why have two levels of legality? A good question, indeed!
For the most part, you will only care that your documents are well formed. Well-formedness alone allows you to create ad hoc XML documents that can be generated, added to an application, and tested quickly. The bottom line? Well-formedness is mandatory, but validity is an extra, optional step. The first thing we want to do is to create an XML document. Here it is again, with a few more nodes added to it: Example 1.
It really is as good as we say it is--or your money back. As Figure 1.
Notice the little minus signs next to some of the XML nodes? A minus sign in front of a node indicates that the node contains other nodes. If you click the minus sign, Internet Explorer will collapse all the child nodes belonging to that node, as shown in Figure 1. Collapsing nodes displaying in Internet Explorer. View larger image. The little plus sign next to the first product node indicates that the node has children.
Clicking on the plus sign will expand any nodes under that particular node. In this way, you can easily display the parts of the document on which you want to focus. Now, open your XML document in any text editing tool and scroll down to the cost node of the second product. You should see an error message that looks like the one pictured in Figure 1. Error message displaying in Internet Explorer. Furthermore, it provides a nice visual of the offending line, a little arrow pointing to the spot at which the parser thinks the problem arose.
Because Internet Explorer uses a non-validating parser by default remember, this means it only cares about well-formedness rules , it runs into problems at the end tag. You now have to backtrack to find out why that particular end tag caused such a problem. Open your XML document in an editor once more, and fix the problem we introduced above.
Save your work and reload your browser.
You should see an error message similar to the one shown in Figure 1. Debugging a more complex error. At first glance, this error message seems a bit more obscure than the previous one. However, look closely and what do you see? Firefox is a popular open-source browser, and at the time this book went to print the latest version was 1.
You can download a free copy from the Mozilla website. How do you do that? Well, there are a couple of options, listed below. All you have to do is visit the appropriate page, upload your document, and the parser will validate it.
Here is the most popular online parser. Viewing raw XML in Firefox. Using a Local Validating Parser Sometimes, it may be impractical to use a Website to validate your XML because of issues relating to connectivity, privacy, or security. Just download the package and install it by following the instructions provided.
Be warned, however, that you will have to know something about working with Java tools and files before you can get this one installed successfully. This checks for well-formedness if the document has no DTD, and for well-formedness and validity if a DTD is specified. Results of the validation will appear under the Results area, as illustrated in Figure 1.
For most purposes, an online resource will do the job nicely. If you work in a company that has an established software development group, chances are that one of the XML-savvy developers has already set up a good validating parser.
This project will help ground your skills as you obtain firsthand experience with practical XML development techniques, issues, and processes. It usually consists of the following components: A data back-end comprising XML or database tables that contains all your articles, news stories, images, and other content. A data display component — usually templates or other pages — onto which your articles, images, etc. A data administration component.
This usually comprises easy-to-use HTML forms that allow site administrators to create, edit, publish, and delete articles in some kind of secure workflow. Requirements Gathering Before you build any kind of CMS, first you must gather information that defines the basic requirements for the project.
The goal of the CMS is to make things easier for those who need to develop and run the site. And making things easier means having to do more homework beforehand!
Although you may groan at the thought of this kind of exercise, a set of well-defined requirements can make the project run a lot more smoothly. What kind of requirements do we need to gather? Essentially, requirements fall into three major categories: What kind of content will the CMS handle?
How is each type of content broken down?
Who will be visiting the site, and what behaviors do these users expect to find? For example, will they want to browse a hierarchical list of articles, search for articles by keyword, see links to related articles, or all three? What do the site administrators need to do? For example, they may need to log in securely, create content, edit content, publish content, and delete content.
If your CMS will provide different roles for administrative users — such as site administrators, editors, and writers — your system will become more complex. In the world of XML, each of these different types of content is, naturally enough, called a document type.
You also have to know how each of these content types will break out into its separate components, or metadata. Each article, for instance, will have various pieces of metadata, such as a headline, author name, and keywords, each of which the CMS needs to track. The final challenge — to define various types of metadata — can be a blessing in disguise.
In my experience, once people grasp the importance of metadata, they race off in every direction and collect every single piece of metadata they can find about a given content type.
Specifying :last to any page is now available. Now able to add the content from multiple elements into a running header without loosing their formatting properties. Composite values for -ah-leader-length can now be specified. Multiple background images can now be specified.
Now users can select the stylesheet language and content strategy that best suits their business needs. High speed Formatter is the fastest formatting software available. In batch mode Formatter can start to produce PDF output immediately from the inputted file.
Format virtually any size document Antenna House Formatter can format a document of virtually any size whether it is a publication, tens of thousands of invoices, reports or personalized one to one documents. This is a function indispensable to comply with Section , the law of the United States enforced on June 21, Integration Interface Antenna House provides Command line interface,.
The various interfaces make for easy system integration of Formatter with web applications, content management systems, and other software products.