In the sample file, the import statements are made with the shorter form, such as Next, add the error-handling logic.The most important point is that a JAXP-conformant document builder is required to report SAX exceptions when it has trouble parsing an XML document.The DOM parser does not have to actually use a SAX parser internally, but because the SAX standard is already there, it makes sense to use it for reporting errors.As a result, the error-handling code for DOM applications is very similar to that for SAX applications: as an argument when the program is run.The Document Object Model provides APIs that let you create, modify, delete, and rearrange nodes.
Node attributes are not included as children in the DOM hierarchy. Those operations are sufficient to get from anywhere in the tree to any other location in the tree.
The example does this by echoing the DOM nodes, and then printing them out onscreen, with the appropriate indentation to make the node hierarchy apparent.
The specification of these node types can be found in the DOM Level 2 Core Specification, under the specification for The information in this table is extremely useful; you will need it when working with a DOM, because all these types are intermixed in a DOM tree.
The following The default values for all these properties is false, which preserves all the lexical information necessary to reconstruct the incoming document in its original form. Ignoring Comments(ignore Comments); Ignoring Element Content Whitespace(ignore Whitespace); Coalescing(put CDATAInto Text); Expand Entity References(! Note - Text nodes exist under element nodes in a DOM, and data is always stored in text nodes.
Setting them to true lets you construct the simplest possible DOM so that the application can focus on the data's semantic content without having to worry about lexical syntax details. Perhaps the most common error in DOM processing is to navigate to an element node and expect it to contain the data that is stored in that element. Even the simplest element node has a text node under it that contains the data.