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This section documents existing formats related to describing items/things.

Existing Microformats

Two microformats (hListing, hReview) already explicitly deal with "things" and in fact do provide a node for gather attributes to the thing. In the case when they're refering to people, they both use class="item vcard" but when they're refering to things they just use class="item".




hCard is used to mark up people and organizations. However, we find that many of the fields are reused in both hReview and hListing. Here are other fields that potentially could be reused (see RFC 2426 for defintions). Some of these may be stretching too far:

Google Base

About Google Base:

Google Base is a place where you can easily submit all types of online and offline content, which we'll make searchable on Google (if your content isn't online yet, we'll put it there). You can describe any item you post with attributes, which will help people find it when they do related searches. In fact, based on your items' relevance, users may find them in their results for searches on Froogle, Google Maps and even our main Google web search.

Item Types

Here are the predefined Google Base item types. Note:

Item Types:

There's a "*" next to Item Types that describe physical things; the links lead to a description of the examples page.

Attribute Types

Google Base Items are defined by compositing Attribute Types together. A complete list of Google Base Attribute types is available here. These are, for example: actor, age, agent, apparel_type, .... Many of these items (actor, agent, for example) are actuall in microformats terms complete microformats in and off themselves.

Data Types

All Google Base attributes are defined in terms of a few simple, elementry types: string, int, float, intUnit, floatUnit, date, dateTime, dateTimeRange, url, boolean, location

Dublin Core


Apparently a lot of vCard terminology is built on these standards, but little useful information can be found on the web.

See Also

item-formats was last modified: Monday, January 5th, 2009