With a Future of XML workshop in the offing, maybe it's time to revisit one of the oldest XML feature requests: binding general entities without using the internal/external subset.
There have been numerous more-or-less serious proposals to address this requirement over the years---here's a new (?) one.
Suppose we introduce a new official PI, named
xml-entity:
<?xml-entity copyright "©"?>
with the obvious consequence that any use thereafter of
©r...
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