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Dublin Core Vs Schema Vs Rdf Vs...
Posted 26 March 2012 - 04:38 PM
I'm unsure of how to choose a metadata system for my site. What are the differences and how can I assess which system(s) to implement? Do sites implement more than one system?
I appreciate that Schema seems to be the most popular amongst Google and Bing, but I remember Michael Martinez mentioning that they also recommend Dublin Core - to what end, I don't know.
Does anybody have some general guidance on this or know of any discussions that I might benefit from reading?
Posted 26 March 2012 - 05:23 PM
Posted 26 March 2012 - 06:23 PM
Before investing heavily in modifying your content to use Schema, do some investigation to see if your competitors are. But keep in mind that early adopters might have an advantage.
At the present time the only vertical I know of which is directly impacted by use of Schema (in terms of Google search results) are recipes. That may change later this year with Google's push toward more semantic search.
Posted 26 March 2012 - 06:29 PM
My assumption so far is to implement the Schema and Open Graph systems for cataloguing my pages and trying to produce rich snippets.
Re Michael's point about who's using it (and thanks for replying to my thread!), none of the sites I'm competing against are using it, from what I can see. They're certainly not reaping any benefits from it in search results, anyway. Large, indirect competitors are getting star ratings showing, but none of the sites I'm competing against are.
Even if metadata for rich snippets isn't fully supported yet, this is one area where I'd like to be an early adopter, for once!
Posted 27 March 2012 - 12:41 AM
Posted 27 March 2012 - 05:29 PM
So if Rich Snippets are different from Schema, and Google and Bing are endorsing Schema, what is Schema for? Sorry if this sounds like I'm going round in a circle here.
Posted 27 March 2012 - 06:05 PM
What all of this code is for is to semantically define content. You can post text on a page that looks like
...and it's pretty likely a search engine is going to figure out that the text represents a company and its address. But if you use the schema code for Corporation and mark up the content like this:
123 Main Street
Cambridge, MA 02142
<div itemscope itemtype="http://schema.org/Corporation">
<span itemprop="name">Acme Products</span>
<div itemprop="address" itemscope itemtype="http://schema.org/PostalAddress">
<span itemprop="streetAddress">123 Main Street</span>
Then you're explicity telling any entity interested in reading it that the text represents a thing, and that thing is a corporation, that one property of that corporation is its name, that another of the properties of that corporation is also a thing, and that thing is a postal address which has properties including its street adress, the city and state where it's located, and its zip code.
You may have a way to make use of that information for searching within your site, and maybe search engines will find a use for it as well. But they don't use it today, at least not in a way that's visible to us.
Edited by qwerty, 27 March 2012 - 06:10 PM.
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