Example of the 'Tag' pattern

The user wants to find more data in the same category and/or contribute data in the same category

Tags added to a blog post.

Tags added to a blog post.

Other example images for the 'Tag' pattern

Tags added to a blog post. When adding tags at flickr, you can choose from tags you gave other pictures (grayed out) or type new. Upon submission, each tag is shown above the input field in a vertical list. They can each be easily removed separately. When adding tags to a video at Vimeo, tags are separated by commas, and each tag are upon submission added  to a horizontal line below the input field. Each tag can easily be removed separately.
Tags added to a blog post. When adding tags at flickr, you can choose from tags you gave other pictures (grayed out) or type new. Upon submission, each tag is shown above the input field in a vertical list. They can each be easily removed separately. When adding tags to a video at Vimeo, tags are separated by commas, and each tag are upon submission added to a horizontal line below the input field. Each tag can easily be removed separately.