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This inability to repurpose wiki data can be a major stumbling block
for using a wiki to collect business rules, which is not a very useful
exercise if you can’t easily repurpose them into your applications or rule
engines.
6.6.4 Wikis and Governance
On the downside, wikis can be very chaotic because they lack governance.
Entries change day to day; when you quote an entry as an authoritative source,
you should also supply the date that you accessed it, since it is so subject to
change. Some CIOs are afraid to launch wikis in their organizations for fear that
they will become a forum for corporate gripes. ...