Tagging a webpage with free text

A Tag is a label attached to someone or something for identification or other information. Typically tags are created attaching a free text label to a resource.

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Example of Tag

We here represent the tagging of a figure depicting the 'Amyloid Beta Protein' and we provide the label 'Amyloid Beta Protein'.

Open Annotation Representation

The Target of the annotation is the image identified by the URI http://alturl.com/wxidq. The Body of the annotation consists in the textual label 'Amyloid Beta Protein'. The nature of the annotation is encoded by the annotation type oax:Tag.

The Annotation instance exhibits an oa:annotator - the agent responsible for entering the information that is used to generate the Annotation - and a oa:generator - the agent, likely software, generating the serialization of the Annotation's graph. Annotation and generation dates are also associated.

In RDF format:

ex:Anno a oax:Tag ;
   oa:hasTarget <http://alturl.com/wxidq> ;
   oa:hasBody ex:uuid ;
   oa:annotator ex:Person1 ;
   oa:annotated "2012-02-12T15:02:14Z" ;
   oa:generator ex:Software1 ;
   oa:generated "2012-02-12T15:02:14Z" ;
   oa:modelVersion <Version1> .
 
ex:uuid a cnt:ContentAsText ;
   cnt:chars "Amyloid Beta Protein" ;
   cnt:characterEncoding "utf-8" .
 
ex:Person1 a foaf:Person ;
   foaf:mbox "john.doe@example.org" ;
   foaf:name "John Doe" .
 
ex:Software1 
   foaf:name "ExAnnotator" .

Some SPARQL queries

Select all the annotations for the target http://www.w3.org/community/openannotation/

SELECT ?anno WHERE { 
   ?anno oa:hasTarget <http://www.w3.org/community/openannotation/> . 
}
=> ex:Anno

Select all the annotations by ex:Person1 for the target http://www.w3.org/community/openannotation/

SELECT ?anno WHERE { 
   ?anno oa:hasTarget <http://www.w3.org/community/openannotation/> . 
   ?anno oa:annotator ex:Person1 . 
}
=> ex:Anno

Select all the bookmarks by ex:Person1

SELECT ?anno WHERE { 
   ?anno a oax:Bookmark .
   ?anno oa:annotator ex:Person1 .  
}
=> ex:Anno

Select all the bookmarks for the target http://www.w3.org/community/openannotation/

SELECT ?anno WHERE { 
   ?anno oa:hasTarget <http://www.w3.org/community/openannotation/> . 
   ?anno oa:hasMotivation oax:Bookmarking . 
}
=> ex:Anno

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