1.
MOAT
Meaning Of A Tag
Alexandre Passant - http://apassant.net
LaLIC, Université Paris-Sorbonne
ESWC Linked Data BOF
1st June 2008

2.
Goals
• A solution to solve free-tagging issues (ambiguity,
heterogeneity, lack of orgnisation)
• An ontology to represent global and local meaning
of tags in a machine-understandable way, using
URIs of LOD resources
• A framework to assign and share meanings to tags
in a collaborative and open way
• A process to create Linked Data from simple
tagging actions

3.
Ontology
moat:Tag
moat:hasMeaning
tags:associatedTag
Resource URI
moat:Meaning
moat:tagMeaning
moat:meaningURI
tags:RestrictedTagging
moat:Meaning
tags:taggedBy
foaf:maker
tags:taggedResource
foaf:Agent
Resource foaf:Agent
Local meaning
Global meanings

4.
Global Meaning
<http://tags.moat-project.org/tag/paris> a moat:Tag ;
moat:name quot;parisquot; ;
moat:hasMeaning [
a moat:Meaning ;
moat:meaningURI <http://sws.geonames.org/2988507/> ;
foaf:maker <http://example.org/alex/>
];
moat:hasMeaning [
a moat:Meaning ;
moat:meaningURI dbpedia:Paris_Hilton ;
foaf:maker <http://myblog.net/user.rdf#me> ;
foaf:maker <http://example.org/alex/>
].

5.
Local Meaning
tags:RestrictedTagging http://tags.moat-
project.org/tag/paris
rdf:type tags:associatedTag
tags:name
http://example.org/
tagging/1 paris
moat:tagMeaning
tags:taggedBy
http://sws.geonames.org/
tags:taggedResource 2988507/
http://example.org/alex
http://example.org/
post/1

6.
Architecture
User creates content and tag it Client queries the MOAT server
<http://sws.geonames.org/4402452/> Server returns the set
for global meaning URIs
User chooses local meaning URI <http://sws.geonames.org/2988507/>
<http://dbpedia.org/resource/Paris_Hilton>
tags:associatedTag
User saves the content
http://example.org/ http://tags.moat-
tagging/1 project.org/tag/paris
moat:tagMeaning
Content enters
tags:taggedResource http://sws.geonames.org/
the Semantic Web 2988507/
tags:taggedBy
http://example.org/
post/1
http://example.org/alex

7.
Drupal Client

8.
LOD benefits
http://tags.moat-
project.org/tag/paris
tags:associatedTag
http://example.org/ tags:name
tagging/1
paris
moat:tagMeaning
tags:taggedBy
tags:taggedResource http://sws.geonames.org/
2988507/
http://example.org/alex
sioc:topic
geonames:parentFeature
http://example.org/
post/1
http://sws.geonames.org/
3017382/
http://example.org/julie
http://tags.moat-
moat:tagMeaning
project.org/tag/france tags:taggedBy
tags:associatedTag
tags:name http://example.org/
tagging/2 sioc:topic
france
tags:taggedResource
http://example.org/
post/2

9.
http://moat-project.org