Experiences in building a semantic web

Relating experiences...
The place of experiences...

the Semantic Web
a semantic web

Disclaimer

This presentation may contain traces of the LDOW-2012 panel

The Web

An open and decentralized platform to
HTTP publish and URI link HTML documents.

The Web

Cliparts: Openclipart

Web semantics

Photos: Wikipedia Cliparts: Openclipart

Web semantics

An open and decentralized platform to
HTTP publish and URI link HTML+... descriptions of things.

Anything new?

Semantic web

An open and decentralized platform to
HTTP publish and URI link RDF? descriptions of things.

Microformats

Grassroot movement (mid 2000's)

<span class="vevent">
  <span class="summary">The Xperience Web workshop</span>
  is held on <span class="dtstart">2012-04-17</span> 
  in <span class="location">room Roseraie 1</span>.
</span>

http://microformats.org/

Open Graph

Launched by Facebook (2010)

<title>The Rock (1996)</title>
<meta property="og:type" content="video.movie">
<meta property="og:title" content="The Rock">
<meta property="og:url" content="http://www.imdb.com/title/tt0117500/">
<meta property="og:image" content="http://ia.media-imdb.com/images/...">

Source: IMDB

http://ogp.me/

Schema.org

Launched by Bing, Google & Yahoo (2011)

<span itemscope itemtype="http://schema.org/Event">
  <span itemprop="description">The Xperience Web workshop</span>
  is held on <span itemprop="startDate">2012-04-17</span> 
  <span itemprop="location" itemscope itemtype="http://schema.org/Place">
    in <span itemprop="name">room Roseraie 1</span> 
  </span>.
</span>

http://schema.org/

Web APIs

{
  "name": "The Xperience Web workshop",
  "start_time": "2012-04-17T14:00:00",
  "location": "room Roseraie 1"
}

ProgrammableWeb.com claims 5600+ APIs
70% of them being REST APIs

Semantic Web

An open and decentralized platform to
HTTP publish and URI link RDF? descriptions of things.

“but RDF is not widely used, ugly and overly complex”

Not widely used? come on...

Ugly? nah...

Photos: Wikipedia Cliparts: Openclipart

RDF goggles

RDB 2 RDF Mapping Language
Sindice & Any23 (Microformats, microdata)
RDFa (Open Graph)
Schema.rdfs.org (Schema.org)
JSON-LD (JSON / Web APIs)

Complex? well...

URI minting can be tricky

The Linked Open Data star scheme

★	make your stuff available on the Web (whatever format) under an open license
★★	make it available as structured data (e.g., Excel instead of image scan of a table)
★★★	use non-proprietary formats (e.g., CSV instead of Excel)
★★★★	use URIs to identify things, so that people can point at your stuff
★★★★★	link your data to other data to provide context