Techniques are disclosed for enabling people to share tagged data via the Internet. In one embodiment, an Internet site receives, via the Internet, from various different users, content items of many different content types. The site also receives a tag for each content item and maps that tag to that content item. When other users supply search query terms, the site selects tags that match the search query terms. The site presents content items that are mapped to the selected tags. Using this technique, users are able to share with each other content items of all different content types using a single Internet site, without needing to store content items of different types on different Internet sites. In order to share a particular content item with other users, the user who wants to share the content item needs only to disclose the particular content item's tag to the other users.