The Online Public Access prototype (OPA) just got an exciting new feature — tagging! As you search the catalog, we now invite you to tag any archival description, as well as person and organization name records, with the keywords or labels that are meaningful to you. Our hope is that crowdsourcing tags will enhance the content of our online catalog and help you find the information you seek more quickly.
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Newly created tags will be reviewed to ensure they meet the National Archives’ tagging policy guidelines, and will be visible the day they are approved and indexed overnight.
http://blogs.archives.gov/online-public-access/?p=5379
Mae’n agored felly mae unrhyw un yn gallu tagio hyd yn oed pobol tu allan i UDA.