[uf-new] Proposal: wishlist microformat

[John]

Alexander Graf wrote:
>> There is a problem.
>>
>> Many auction websites have a "wanted" section, where people can post 
>> what they want. They usually go unnoticed because they're relatively 
>> few and it's very unlikely that someone will have one of the items 
>> listed there. It would be nice if a bot would check my wishlist 
>> periodically and search the web for matching hlistings (or matching 
>> sellers at a different auctions site) and notify me about it if I 
>> want to.
>>
>> It could also have other uses, but I'm keeping those a secret for the 
>> time being, I think one reason should be enough, no?
>
> You will still have to tell your crawler the urls it should crawl, it 
> can't crawl the whole web and find only *your* wishlists. So, if the 
> crawler knows the URL to look at, it doesn't matter how the content is 
> marked up, semantically. XOXO and/or hReview for items is enough. The 
> crawler looks at all hReview entries on the page and stores them in a 
> database. Then it can do whatever you want it to.

But how would a spider know that a XOXO list that it retrieves is a 
wishlist and not something else? For example, I can have two XOXO lists 
in a webpage, one being a wishlist and another being items I have for 
sale. How will the crawler know which is which?

Shouldn't the markup state whether an item is for sale or wanted or 
simply a review by the page author?

If not, won't lots of mistaken interpretations happen?