Items are the most basic building block of an Omeka site.
An item is a photo, document, or any other single digital object you want to display in your exhibit.
Items contain metadata about the object, and can have uploaded files attached to them. Although images are the most common, there are many possible files types that work in Omeka.
Click Manage Site from your Dashboard page, then Add a new item.
When creating or editing an Item, there are four main tabs used to modify the Item:
Check the Public box to make the item visible on your site.
If you have already created collections (see below), you can add the item to the correct collection by choosing it from the drop-down menu.
When you are happy with the item, then click the green Add Item button to save.
Collections are groups of items you wish to display together in the same section of your exhibit. Each item can only be included in one collection at a time.
Create a collection by clicking Collections on the left menu, then Add a Collection.
Give your collection a title and any other descriptive information you wish, then check the Public box at right and click the green Add Collection button to save it.
When editing an item, you can put it in a collection by choosing it from the menu at the right side of the Add Item screen.
Dublin Core is the name of a metadata standard—a commonly used set of terms used to describe items.
It's used in many other applications besides Omeka.