XOM API for Processing XML with Java

[Kevin Herrboldt <kevin AT puppethead.com>]

I'm wondering if nu.xom.DocType should have an equals() method that 
checks the Public ID and/or the System ID.

Let's say I'm writing an app to process XHTML. Assuming I successfully 
get a Document I'd like to be able to compare the DocType of each 
document against well-known Public IDs.

I was thinking I'd create a DocType object for each XHTML variant 
(strict, transistional, frameset) and then I could do something like:

	DocType XHTML_STRICT = new DocType("html", "-//W3C//DTD XHTML 1.0 
Strict//EN", ...);
	DocType XHTML_TRANS = new DocType("html", "-//W3C//DTD XHTML 1.0 
Transitional//EN", ...);

        if (XHTML_STRICT.equals(myDocument.getDocType()) {
                // special strict actions here....
        } else if (XHTML_TRANS.equals(myDocument.getDocType()) {
                // special transistional actions here...
        }

        etc.

I'd imagine DocTypes would be equal if they both had public ids that 
were identical, or neither had a public id and the system ids matched. 
Or something like that.