Notes Writing in Schemas

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Notes 10/11/2011

http://activearchives.org/wiki/Writing_in_Schemas

Triples

Everything is a potential to be linked

When we were looking at dbpedia -- a problematic place to start

The flattening out ... a category becoming a page

Everything is an element

Keyword on the relationship

What used to be a tag ... is now a tag on a relationship

A traditional database ... a list of works, titles

How to connect through a tag classic style ... keyword abuse

Most organisations have CMS / frameworks; SARMA was still writing HTML by hand. Meant the writing and linking was much richer than most other institutes.

Permits variation of lay-out, next to html there are other solutions: (for the 3000 reviews, there is a db) They were used to work in a hypertextual way. How to tag as part of the writing, put the tag into the text, in context.

True semantic markup: the linked-data approach allows to write with tags. Each tag has it's own writing space.

While writing a text, you want to tag. Not as an after thought, something that happens after.

We will not write triples directly but use RDF-a

Remember: RDF = links with a color, flavour

<li><a href="/Deborah Jowit" rel="flavour of the relationship">Tag goes here</a></li>

if not otherwise specified, the document is the subject
the link is the relationship
the rel attribute stands for the label of the relation

rapper --input rdfa --output turtle http://activearchives.org/sarma/docs/view/1351

Why The Semantic Web is not happening: it needs to be easier to mix into text. RDF-a is 'attributed' RDF "rel" is the attribute

Sneaking in the rdf into old fashioned HTML, or: it was already there, in the original plans by Tim Berners Lee The idea of machine-proposed links. Where is the work happening? It is not the computer that becomes self-aware. Let's make good authoring tools that allow readers and writers to work on marking up. Distribute the work.

FOAF project: creating a web of machine readable pages that describe people http://www.foaf-project.org/

A distribute way of showing, describing social networks. Remember friendster? Urban Legends: Friend-of-a-friend story is something like "the man that has seen a man that has seen a bear..." Privacy becomes an issue ... or is it product? Linked-in? vcard?

lyrics of foo fighters song 'foaf': (human readable description of a person) http://www.azlyrics.com/lyrics/foofighters/friendofafriend.html

foaf specification: http://xmlns.com/foaf/spec/#term_Organization

FOAF-a-matic: http://www.ldodds.com/foaf/foaf-a-matic send your foax to: mm@automatist.org

To create a foaf file through a web form http://www.ldodds.com/foaf/foaf-a-matic

Example of a "turtle story":

@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix bio: <http://vocab.org/bio/0.1/>.
<http://automatist.org/> foaf:knows <http://femke.org/> .
<http://automatist.org/> foaf:name "Michael" .
<http://femke.org/> foaf:knows <http://nicolas.org/> .
<http://nicolas.org/> foaf:knows <http://automatist.org/>.

C H A R A C T E R S

Fanny:

King Lear: <http://dbpedia.org/page/King_Lear/>

Frida: http://www.frida.com

Julia: <http://www.juliamaigret.be>

Template for writing your foaf:

<html xmlns:foaf="http://xmlns.com/foaf/0.1/">
  <head>
    <title>Mark Birbeck's profile</title>
    <link rel="foaf:primaryTopic foaf:maker" href="#me"/>
  </head>
  <body>
    <div about="#me" typeof="foaf:Person">
      <span property="foaf:name">Mark Birbeck</span>
      <a rel="foaf:weblog" href="http://internet-apps.blogspot.com/">XForms and Internet
        Applications</a>
      <a rel="foaf:knows" href="http://www.w3.org/People/Ivan/#me">Ivan Herman</a>
      <span rel="foaf:img">
        <img src="http://www.formsplayer.com/files/pictures/picture-11.jpg"
         alt="Picture of Mark Birbeck"/>
      </span>
 
      <span rel="foaf:holdsAccount">
        <span typeof="foaf:OnlineAccount">
          <a rel="foaf:accountServiceHomepage" href="http://twitter.com/">Twitter</a>
          <span property="foaf:accountName">markbirbeck</span>
        </span>
      </span>
 
    </div>
  </body>
 </html>

To Test your FOAF file (here called me.foaf): http://www.w3.org/2007/08/pyRdfa/

To find your errors in xml:

xmllint (commandline)
save as .xml and look at it in firefox

rapper --input rdfa --output turtle me.foaf

The FOAF Vocabulary: http://xmlns.com/foaf/spec/

Example of a triple:

Subject // about = // #me OR Typeof= (defines new Subject)
Predicate // property= or rel=// foaf:name OR Relation // rel= // looks at href or src
Object // <>content</> // 'myname'

<html xmlns:foaf="http://xmlns.com/foaf/0.1/">
  <head>
    <title>Michael Murtaugh: Welcome!</title>
  </head>
  <body>
    <p about="http://automatist.org/#me">
     Hello and welcome to my homepage. My name is <b  property="foaf:name">Michael Murtaugh</b>. My email is  mm@automatist.org.
    </p>
  </body>
 </html>

LIST OF PEOPLE: