JAXP 1.3 has added functionality to create XPath expressions independent of their implementation
creates XPath objects
Creates a XPathFactory based on:
The class-name defined by the 'javax.xml.xpath.XPathFactory' Property
The class-name defined in the properties file 'lib/jaxp.properties' in the JRE directory.
The class-name defined in the META-INF/services/javax.xml.xpath.XPathFactory file in available jars