By Andrew Watt
This advisor for net masters and IT programmers indicates how XPath permits XML facts to be restructured in order that it may be remodeled, displayed, and exchanged between businesses that will not be utilizing an analogous DTDs or schemas. Examples and resource code illustrate useful purposes of XPath and its framework, syntax, semantics, and use. Watt has been a contributing writer to numerous XML titles.
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The Document Type Declaration also contains a reference to the external subset, if it exists, of the Document Type Definition. DOCTYPE MyElement [internal subset]> If the Document Type Definition has an internal subset, it is contained within the square brackets in the Document Type Declaration, as shown above. dtd [internal subset]> In addition to the XML declaration and the Document Type Declaration, the Prolog of an XML document may contain comments, processing instructions, and whitespace. Following the Prolog, the element root of the document occurs.
DOCTYPE MyElement [internal subset]> If the Document Type Definition has an internal subset, it is contained within the square brackets in the Document Type Declaration, as shown above. dtd [internal subset]> In addition to the XML declaration and the Document Type Declaration, the Prolog of an XML document may contain comments, processing instructions, and whitespace. Following the Prolog, the element root of the document occurs. Starting with XML and XSLT Comments The syntax for XML comments is the same as in HTML.
The id attribute is optional. It would be of use if an XSLT stylesheet were embedded within another XML document. In that case the id attribute would provide a way to refer to the XSLT stylesheet by name. The extension-elements-prefixes attribute is used when extension elements are present in a stylesheet. Each such extension element must be prefixed by a namespace prefix that is not in the XSLT namespace. The exclude-result-prefixes attribute designates namespace prefixes present in the stylesheet that are to be excluded from the result document, unless they are actually used in the result document.