RFR(JAXP) 8182111: Package summary is missing in jdk.xml.dom module

[huizhe wang]

Hi,

Please review new package descriptions for jdk.xml.dom module. Note that 
the link to the XPath specificaiton in xpath/package-info.java is the 
formal release that is different from the one in the classes. The later 
was a working release now requires a login [1]. The only difference in 
the formal release is that the error numbers in XPathException were 
changed from 1 and 2 to 51 and 52. We may consider updating to the 
formal release in JDK 10.

JBS: https://bugs.openjdk.java.net/browse/JDK-8182111
webrevs: http://cr.openjdk.java.net/~joehw/jdk9/8182111/webrev/

[1] http://www.w3.org/2002/08/WD-DOM-Level-3-XPath-20020820

Thanks,
Joe