[XML-SIG] [Q] Namespace

[Lars Marius Garshol]

* Tamito Kajiyama
| 
| First, according to the specification (Subsection 5.2), "If the URI
| in a default namespace declaration is empty, then unprefixed
| elements in the scope of the declaration are not considered to be in
| any namespace."  I cannot understand what this means.  What should a
| parser do on such unprefixed elements?  Really nothing to do?
 
This is used for turning off a default namespace:

<root xmlns="http://default.namespace.uri/">
  <foo/>  <!-- The expanded name is here ns='http://default.namespace.uri/'
               and type='foo' -->
  <bar xmlns=""/> <!-- The expanded name is here ns="" and type="bar -->
</root>

| Second, what is the initial value of the default namespace before
| the first declaration of the default namespace appears?  Is the
| default namespace undefined at first? 

So it is. The namespace is not defined until an explicit declaration
appears, which is entirely reasonable to me, at least.

| I think it is reasonable that the namespace associated to the DTD of
| the XML document, if any, would be the first default namespace.

What do you mean by this? I can't follow you here.

--Lars M.