Guidelines for Curation Metadata

At the Curation Workshop I heard the question "Well, when we created our digital collection, we just kept the filenames, but we realize now that that's not enough; what should we have kept as metadata?"

So, I jotted down how I would approach that question, starting from the roles that are played by the metadata. Here is a link to these Guidelines for Designing Metadata (PDF format). I thought it might be helpful to curators.