Github user afs commented on the pull request:
https://github.com/apache/jena/pull/55#issuecomment-98231727
OK - to confirm this PR is not "draft" any more but proposed final.
`ExtendedIterator` is different because it is in the `Graph` interface from
`find`. That means it is used not just within the codebase of Jena but also by
external projects/products that extend Jena.
That does not mean it can't change; it needs wider discussion of the
tradeoffs though. Jena3 is not compatible with unchanged Jena2 applications but
at the same time, if the gap is too great, the changeover is likely longer.
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