Topic: sources for data feeds in xml or json
I would like to create an app which utilizes an existing data feed.
for example a grocery list app which has the aisle numbers that items are located in, etc.
Is there an existing directory of companies that make data available as a feed online in a format like xml or json? for example in the way that amazon has a feed for affiliates?
I have been googling terms like "json data feeds" but have not found much.
just wondering if anyone had run across any good resources.