Tags are not standardized like metadata is.
Tags are a way to make up for gaps or omissions in standardized schema - such as Library of Congress Subject Headings.
Think about them like keywords you would search to find an object. Omeka allows you to see the tags others in the course are using by going to 'Manage Site' then 'Tags'.
Think of tags as a way for folks to find items in your course site across users and exhibits. Collaborate with your colleagues about how you'd like others to discover like items.
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