xml-dev - Entity's replacement text contain an entity reference?

["Roger L. Costello" <costello@mitre.org>]

(Sorry, I screwed up on the Subject line in my last message.  Now it is
correct.)

Hi Folks,

Can an entity's replacement text contain an entity reference?  For
example,

<?xml version="1.0"?>
<!DOCTYPE test [
<!ENTITY foo "foomeister">
<!ENTITY boo "it is a &foo;">
]>
<test>
    &boo;
</test>

Note that the entity, boo, has in its replacement test a reference to an
entity, foo.  Is this legal? (Seems like it should be since the
replacement text is "parseable".)  I imagine the above XML to expand to:
 
<test>
    it is a foomeister
</test>

If this is legal, what XML parsers support it?  IE5 doesn't seem to.
/Roger


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