By Sas Jacobs
This e-book is nice for either novices and for extra complicated humans. good equipped and methodical. effortless to experiment and pinpoint goods.
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Extra resources for Beginning XML with DOM and Ajax: From Novice to Professional
Each of the attributes in the XML declaration is optional, but the order is important. If you choose to include an encoding attribute, it must appear after the version attribute. The standalone attribute must appear as the last attribute in the declaration. Processing Instructions The prolog can also include processing instructions (PIs) that pass information about the XML document to other applications. The XML processor doesn’t process PIs, but rather passes them on to the application unchanged.
In other words, they forbid anything that the schema doesn’t allow explicitly. The XML schema language offers some extensibility, but it’s still fundamentally a closed language. Other schema languages are open, allowing additional content that the schema doesn’t forbid explicitly. You can use these languages either as an alternative to DTDs or XML schemas, or as an addition. Their processing occurs after the processing of the closed schema. You may wish to use an alternative schema type if you wish to impose a constraint that isn’t possible using a DTD or XML schema.
Understanding Sections Within the XML Document Element The data within an XML document is stored within the document or root element. This element contains all other elements, attributes, text, and CDATA within the document and may also include entities and comments. Elements Elements serve many purposes in an XML document. They • Mark up content • Provide a description of the content they mark up • Provide information about the order of data and its relative importance • Show the relationships between data Elements include a starting and ending tag as well as content.
Beginning XML with DOM and Ajax: From Novice to Professional by Sas Jacobs