Embedding Content as Element Content or As An Attribute Value

Christopher D. Manning cmanning at sultry.arts.usyd.edu.au
Thu Jan 8 22:46:59 GMT 1998

On 8 January 1998, Tim Bray wrote:
 > ><!ELEMENT Foo (bar1 | bar2 | bar3)*>
 > any number of bar1, bar2, and bar3 elements in any order
 > I agree that the semantic of '|' is not as it is in some other
 > systems. -T.

I disagree.  The | _is_ meaning bar1 or bar2 or bar3 -- one only, but it
scopes inside the Kleene star operator, which means any number of
repetitions of the stuff before it, which therefore gives the
semantics above.

Chris Manning

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