XOM API for Processing XML with Java

[Sandy Mustard <Sandy.Mustard AT ugsplm.com>]

Forgive my ignorance of BaseURIs but is this possible?

<element xml:base="">abc</element>

If so, then shouldn't getBaseURI() return "" and in the following case

<element>abc</element>

getBaseURI() return NULL?

Sandy Mustard

Elliotte Harold wrote:

> A recent erratum to the XML Base spec states:
>
> The base URI of an element bearing an |xml:base| attribute with a value 
> that is not a valid URI reference is application dependent.
>
> In this context, XOM is an application, and can do whatever it wants to 
> in this case.
> The question is what it should do.  For example, consider this document:
>
> <element xml:base="http://www.example.com/test/%GF.html"/>
>
> What is the base URI of the element? Here are the possibilities I've 
> thought of:
>
> 1. Return null (what XOM is doing now)
> 2. Return the value of the xml:base attribute untouched and unresolved.
> 3. Return the empty string
>
> Any other ideas?
>
> Related question:
>
> Element root = new Element("root");
> Document doc = new Document(root);
>
> What should doc.getBaseURI() and root.getBaseURI() return? Currently 
> null is being returned. However
> according to RFC 2396:
>
>   A URI reference that does not contain a URI is a reference to the
>   current document.  In other words, an empty URI reference within a
>   document is interpreted as a reference to the start of that document,
>   and a reference containing only a fragment identifier is a reference
>   to the identified fragment of that document.
>
>
> Thus perhaps it makes sense here to return the empty string here instead 
> of null? That would also avoid some possible unexpected 
> NullPointerExceptions if a client forgot to do a null check.
>
> --
> Elliotte Rusty Harold
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