The following figure shows the appearance of opening an XML document on a web browser. You can click on the " " and "-" sign to expand and collapse a portion of the tree., if its structure meets the XML specification, i.e., it is syntactically correct.This refcard provides developers a concise overview of the different xml processing technologies in Java, and a use case of each technology.Line 2: DOCTYPE : DTD definitions can either be embedded in the XML document or referenced from a DTD file.Many HTML documents have more markup tags than the contents.Worse still, many of the markup tags are dealing with the appearance of the document (e.g., XML declaration XML comment Root element start-tag (one and only one root) Child element start-tag (with an attribute in name="value" pair) (proper nesting of child elements) Child element end-tag Second child element start-tag Second child element end-tag Third child element start-tag Third child element end-tag Root element end-tag pairs.
Its primary purpose is to help information systems share structured data, particularly via the Internet, and it is used both to encode documents and to serialize data.(W3C also maintains specifications for HTTP, HTML, XHTML, CSS, among others.) XML is a family of technologies, which includes: I assume that you have some basic understanding of the HTML.The HTML's original objective of letting the document author to focus on the contents of the document and leave the actual appearance of the document to the browser, has gone out of control.To validate an XML document with the Xerces2-j parser, the Xerces2-j classes need to be in the classpath.The Xerces2-j parser may be obtained from the Xerces2-j page.The DOM API is filled with design patterns, especially creational patterns: package consists solely of interfaces), which can let a misbehaved program wreak havoc in a shared environment such as an app-server.