Schemas

leo picadobackcountry.com

1. What’s behind all of this?2. The past3. The present4. When?5. Our competition6. Schemas identified7. How to test it?8. FAQ9. More info

http://www.w3.org/TR/xhtml-rdfa-primer/» browser » user

» Semantic Web (Web 3.0)» Help machines understand semantics semantics, yummy

1. RDFa2. Microformats

» 2004: Mark Birbeck (W3C)» Part of XHTML 2.0» RDF in HTML attributes = RDFa» Attributes used: about, src, rel, rev, href, resource, property, content, datatype, typeof» Pros ˃ Publisher Independence ˃ Self Containment: HTML | RDFa» Cons ˃ XML based ˃ There is not a ‘standards body’ for formats ˃ A bit complex

- div: - standard namespace - item being coded- span: title- span: author- span: date

» 2007: Tantek Çelik, Dan Cederholm» ‘Support’ for both XHTML/HTML» Attributes used: class, rel, rev, id» Pros ˃ Simplicity» Cons ˃ Short list of elements (9 stable) ˃ Likes IDs! ˃ Accesibility issues http://bbc.co.uk/blogs/radiolabs/2008/06/removin g_microformats_from_bbc.shtml

- div:- div: first name- div: organization name- div: telephone number- a: url

» Microdata» schema.org

» Part of the HTML5 spec» Delimited set of attributes: itemscope, itemtype, itemprop, itemref» Similar to RDFa’s take» Pros ˃ Publisher Independence ˃ Self Containment: HTML ˃ Attribute based ˃ Easy to implement» Cons ˃ Each site can use it’s own standards

» Google, Bing and Yahoo!» Uses HTML5 spec» Wide range of schemas (611 as of 10/11’)» Easily Nestable» Thing based

- div scope:movie- h1: name- div: director / scope:person - span: name - span: birthDate- span: genre- a: trailer

» where it makes sense (think SEO)

» REI is using schema.org» Altrec is using microformats» Sierra Trading Post is not using any.

1. Webpage2. WPHeader3. SiteNavigation4. Store

1. WPAdBlock2. Product3. AggregateRating4. Organization

1. AggregateOffer2. InStock3. ImageGallery

1. Review2. Person3. UserComments4. ImageObject5. VideoObject

1. WPAdBlock2. WPFooter3. SiteNavigation

» Header: 4 | global» Content: 12» Footer: 3 | global» Total: 19

» how deep? ˃ “more is better, except for hidden text”» missing/implicit information? ˃ “meta tag it”» working with dates ˃ use the html5 tag <time>» can an itemprop be also a itemscope? ˃ hell yeah

» Google’s Rich Snippets Testing Tool ˃ http://google.com/webmasters/tools/richsnippets» Validator ˃ http://validator.nu/» Live Microdata ˃ http://foolip.org/microdatajs/live/

» http://slideshare.net/fabien_gandon/rdfa-in-a- nutshell-v1» http://microformats.org/wiki/Main_Page» http://schema.org/docs/gs.html

Schemas

by Leonardo Ortega on Nov 30, 2011

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