The below brainstorm and examples are for the general genre of wishlists and gift registries.

Potential verbs

• save (already in Atom Activity Streams Base Schema) 

Potential objects

• product
• list

Use Case: Adding an item to a Wishlist

• <activity:verb> = save
• <activity:object-type> = product
• <activity:target> = list

Example: Anna Apple added Monopoly to My Wishlist on Amazon.com

Use Case: Adding an item to a Registry

• <activity:verb> = save
• <activity:object-type> = product
• <activity:target> = list

Example: Bob Bacon added MixMaster 4000 Super Blender and Smoothie Maker to Wedding Registry on Target.com

Potential Object Representations: Product

Below are potential child elements of an <activity:object> representing a wishlist

• <id> = Unique ID for that product
• <title> = Name of product
• <link rel="alternate" type="text/html" href="/<URL_to_page_for_product>" ... />
• <link rel="preview" type="image/jpg" href="/<URL_to_thumbnail_product_image>" ... />
• (optional) <link rel="enclosure" type="image/jpg" href="/<URL_to_full-sized_product_image>" .../>
• (optional) <summary> = Short description of the product
• (optional) <content> = Extended description of the product

Potential Object Representations: List

Below are potential child elements of an <activity:object> representing a list

• <id> = Unique ID for that list
• <title> = Name of list
• <link rel="alternate" type="text/html" href="/<URL_to_page_for_list>" ... />
• (optional) <link rel="preview" type="image/jpg" href="/<URL_to_thumbnail_list_image>" ... />
• (optional) <link rel="enclosure" type="image/jpg" href="/<URL_to_full-sized_list_image>" .../>
• (optional) <summary> = Short description of the game
• (optional) <content> = Extended description of the game 

Code Example for Adding an item to a Wishlist

<entry>

<id>, <link>, <title>. <summary>, <content>, <published>, <author>, etc.

<activity:verb>http://activitystrea.ms/schema/1.0/save</activity:verb>

<activity:object>

<activity:object-type>http://activitystrea.ms/.../product</activity:object-type>

<title>{Product Name}</title>

<link rel="preview" type="image/jpeg" href="/{URL to product thumbnail image}" />

<link rel="alternate" type="text/html" href="/{URL to product page}" />

</activity:object>

<activity:target>

<activity:object-type>http://activitystrea.ms/.../list</activity:object-type>

<title>{List  Title}</title>

<link rel="preview" type="image/jpeg" href="/{URL to list thumbnail image}" />

<link rel="alternate" type="text/html" href="/{URL to list webpage}" />

...

</activity:target>

...

</entry>

Comparison with Photo Album Construction

This wishlist proposal was modeled after the photo-album construction in the spec. Here is a comparison of the two formats:

Wishlists and Registries on the Web

Some popular sites that offer Wishlists and Registries

• Wishlists - Amazon.com (including a Universal Wishlist), Wishlist.com
• Wedding Registry - Target, WalMart, Crate and Barrel