I am working with some enwiki-{YYYYMMDD}-stub-meta-history.xml dumps and
wanted to get clarification on how certain fields of the articles can
change:

1. What action will make an article get a new pageId? Is it
only move/rename, a redirect, or a deletion and recreation, or are there
other ways this could happen? Can any of these changes be detected from the
stub-meta-history.xml files?

2. Is it possible for just one particular revision of an article to be
deleted, maybe due to a copyright violation? If so, is just the content of
the revision deleted or would this include all the data associated with it,
so that the revision would not even appear in the stub-meta-history.xml
file?

3. Are pageIds recycled? If a page is deleted, could its id number be used
for a completely new page in the future?

Thanks,
Jeff
-- 
Jeff Kubina
http://google.com/profiles/jeff.kubina
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