  Use of ID attribute types.  id attribute Greetings, XML gurus.
{:o)    I have a few questions around the use of ID attributes:
1) As far as I know the ID attributes have a scope of uniqueness
within a document instance, that is, these are unique in the
whole document.  Is there a mechanism, probably an extension of
XML, where I can define the scope of ID attributes whitin a
document fragment using a scheme language? (I know that this I
can't achieve it using a DTD, right?)  e.g. the following
example would be valid...    <element-one   id-attribute="ALUX"
/>  <!-- use the same ID -->   <element-two   id-
attribute="TIKAL" />   <element-three id-attribute="ALUX" />
<!-- use the same ID -->  2) The use of XML namespace in ID
attributes:  if I define two namespaces within a document, and
those namespace include some attributes where their names are
the same and they are ID attributes too... then I could have the
same ID values which would be semantically different, right? and
thus, they would be different ID