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The Dublin Core

One standard set of metadata is called the Dublin Core (see http://dublincore.org). The Dublin Core provides additional information about content-centric objects, such as the title, description (summary or abstract), and author of an object. As mentioned previously, the Dublin Core was very successful in Zope 2's CMF and Plone.

In the Dublin Core, all elements are lists, which means they can have multiple values. The Dublin Core elements are useful because they cover the most common metadata items, such as the creation date, title, and author. This data is useful in the context of most objects, and with it, at least their high-level meaning is easily understood. But there are some issues with the Dublin Core. There is a temptation for developers to interpret some deep meaning into the Dublin Core elements because it is such a well-established standard. As Ken Manheimer pointed out, even the Dublin Core designers succumbed to that temptation and tried to be a bit too ambitious with some of the fields.


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