Omeka Assignment

Omeka seems to be a good tool for creating collections, even though I haven't used any other similar system. The challenging part is cataloging the item with the Dublin Core metadata scheme. Without having a good understanding of Dublin Core, many of the fields don't make sense to me. I can see that most of the metadata doesn't pertain to the types of items in my collection (documents & websites) so I've left much of the metadata blank.