By Joe Marini
ISBN-10: 0072228318
ISBN-13: 9780072228311
ISBN-10: 1280302054
ISBN-13: 9781280302053
Rfile item version Analogy: in lots of methods, the record item version (DOM) might be in comparison to the schematic of a home. A house's schematic info the relation and site of items inside a home. for example, inside of a schematic, you could comprehend the connection of the sink to the wall, in addition to the corresponding plumbing. In different phrases, the schematic defines the connection of 1 item to a different and sometimes, illustrates the foundations through which they're ruled. HTML and XML records also are composed of gadgets, and even supposing those gadgets is probably not actual, like a sink, their organization and interplay remains to be coordinated via a collection of ideas. to that end, the DOM acts as a beginning for the location and interplay of items inside of a record. no matter if the item is a desk, a section of data, or a script, the DOM specifies a version for the interplay of those items. For builders, an intensive knowing of those relationships is paramount, and infrequently, it kinds the root for a system's improvement.
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Additional info for Document object model : processing structured documents
Example text
The DOM specification does not specify anything having to do with multithreading or other thread-safety topics. For the moment, this is left up to individual implementations. What the DOM Isn’t Now that we’ve spent the better part of the chapter discussing what the DOM is, we’ll take a moment and point out a few of the things that the DOM is not (in fact, the actual W3C specification goes out of its way to do pretty much the same thing— perhaps they wanted to avoid any misconceptions of the DOM as early as possible): The DOM isn’t a way of creating programs that are, in the spec’s words, “binary compatible,” in other words, usable across disparate computer systems without recompiling.
The last argument, docType, is the type of document to create, as specified by a DocumentType object. The createDocumentType() method creates an empty DocumentType object and also takes three arguments. The first, qualifiedName, is the qualified name of the DocumentType to create. The second and third arguments, publicID and systemID, specify the public ID and system ID of the DocumentType. 0 and earlier. In these cases, it is up to the developer to determine whether a particular implementation exposes the features that a program needs.
First, they are not actually child nodes of the elements that they are attached to, and thus the DOM does not consider them to be part of the Document tree. If you attempt to read the values of the parentNode, previousSibling, or nextSibling properties of an Attr object, they will return null. The reason for this is that the DOM considers attributes to be properties of elements rather than having their own, separate identity from the elements they are associated with. The idea is that this should make it easier to implement features such as default attributes for all elements of a certain type.
Document object model : processing structured documents by Joe Marini
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