Develop for TYPO3 with Semantic Web in mind.

1. Semantic TYPO3
Develop Extensions with Semantic Web in Mind
Jochen Rau @ T3CON11SF
June 11, 2011

8. (c) by Benjamin Nowack, Attribution 3.0 Unported (CC BY 3.0)

9. Concepts
(c) by Benjamin Nowack, Attribution 3.0 Unported (CC BY 3.0)

10. Implementations
(c) by Benjamin Nowack, Attribution 3.0 Unported (CC BY 3.0)

11. http://commons.wikimedia.org/wiki/File:Z%C3%BCrich_-_Seefeld_-_Heureka_IMG_1757.JPG

12. No Rocket
Science

13. Let's make some assertions about me
Jochen's is a Person.
Jochen's age is 40.
Jochen's name is Jochen Rau.
Jochen likes TYPO3 and Wine.
Jochen lives in Massachusetts.

14. Let's make some assertions about me
Jochen's is a Person.
Jochen's age is 40.
Jochen's name is Jochen Rau.
Jochen likes TYPO3 and Wine.
Jochen lives in Massachusetts.
Subject Predicate Object

15. Let's make some assertions about me
Jochen's is a Person.
Jochen's age is 40.
Jochen's name is Jochen Rau.
Jochen likes TYPO3 and Wine.
Jochen lives in Massachusetts.
Subject Predicate Object
Triple

16. Let's make some assertions about me
Jochen 40
age
name
Jochen Rau
is a likes TYPO3
likes
lives in
Jochen's is a Person. Person
Jochen's age is 40. Wine
Massachusetts
Jochen's name is Jochen Rau.
Jochen likes TYPO3 and Wine.
Jochen lives in Massachusetts.

17. Let's make some assertions about me
Jochen 40
age
name
Jochen Rau
is a likes TYPO3
likes
lives in
Jochen's is a Person. Person
Jochen's age is 40. Wine
Massachusetts
Jochen's name is Jochen Rau.
Jochen likes TYPO3 and Wine.
TYPO3
Jochen lives in Massachusetts.
license GNU General
Public License
description
platform TYPO3 is a free and
open source content
management system as
well as a Model–view–
controller (MVC) Web
PHP Application Development
framework written in
PHP.

18. Let's make some assertions about me
Jochen 40
age
name
Jochen Rau
is a likes TYPO3
likes GNU General
license
lives in Public License
Jochen's is a Person. Person description
Jochen's age is 40. Wine
Massachusetts
Jochen's name is Jochen Rau. platform TYPO3 is a free and
open source content
Jochen likes TYPO3 and Wine. management system as
Jochen lives in Massachusetts. well as a Model–view–
controller (MVC) Web
PHP Application Development
framework written in
PHP.

19. Unique Names for Resources
Jochen
knows
Sebastian
likes
Paris

20. Unique Names for Resources
<http://typoplanet.de/resource/Jochen>
<http://xmlns.com/foaf/0.1/knows>
<http://sebastian.kurfuerst.eu/>
<http://xmlns.com/foaf/0.1/likes>
<http://en.wikipedia.org/wiki/Paris_(2008_film)>
<http://typoplanet.de/resource/Jochen>
<http://typoplanet.de/resource/hg132k4jhjh1234t>
<urn:uuid:67ecc3bd-07e2-44f4-a788-597bf9949f0c>
<tel:+1-617-555-7332>
<mailto:jochen.rau@typoplanet.de>

21. Unique Names for Resources
<http://typoplanet.de/resource/Jochen>
<http://xmlns.com/foaf/0.1/knows>
<http://sebastian.kurfuerst.eu/>
<http://sebastian.kurfuerst.eu/>
<http://xmlns.com/foaf/0.1/likes>
<http://en.wikipedia.org/wiki/Paris_(2008_film)>

22. Turtle Serialization of an RDF Graph
<http://example.com/JR>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/Person> .
<http://example.com/JR>
<http://xmlns.com/foaf/0.1/age> "40" .
<http://example.com/JR>
<http://xmlns.com/foaf/0.1/name> "Jochen Rau" .
<http://example.com/JR>
<http://xmlns.com/foaf/0.1/interest> <http://dbpedia.org/resource/TYPO3> .
<http://example.com/JR>
<http://xmlns.com/foaf/0.1/interest> <http://dbpedia.org/resource/Wine> .
<http://example.com/JR>
<http://example.com/livesIn> <http://data.nytimes.com/Massachusetts> .

23. Turtle Serialization of an RDF Graph
@prefix ex: <http://example.org/> .
@prefix dbp: <http://dbpedia.org/resource/> .
@prefix nyt: <http://data.nytimes.com/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
ex:JR a foaf:Person .
ex:JR foaf:age "40" .
ex:JR foaf:name "Jochen Rau" .
ex:JR foaf:interest dbp:TYPO3 .
ex:JR foaf:interest dbp:Wine .
ex:JR ex:livesIn nyt:Massachusetts .

24. Turtle Syntactic sugar
@prefix ex: <http://example.org/> .
@prefix dbp: <http://dbpedia.org/resource/> .
@prefix nyt: <http://data.nytimes.com/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
ex:JR a foaf:Person ;
ex:age "40" ;
ex:name "Jochen Rau" ;
ex:likes dbp:TYPO3 ;
ex:likes dbp:Wine ;
ex:livesIn nyt:Massachusetts .

25. Turtle And even more syntactic sugar
@prefix ex: <http://example.org/> .
@prefix dbp: <http://dbpedia.org/resource/> .
@prefix nyt: <http://data.nytimes.com/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
ex:JR a foaf:Person ;
ex:age "40" ;
ex:name "Jochen Rau" ;
ex:likes dbp:TYPO3 ,
dbp:Wine ;
ex:livesIn nyt:Massachusetts .

26. RDF at a Glance
Simple, ubiquitous way of modeling data
Main concepts
Triples of subject, predicate, and object
Unique names for resources
Objects can also be literal values (with data type or language)
Performant data stores (e.g. Virtuoso, AllegroGraph, BigOWLIM)
Existing frameworks with rich APIs (e.g. JENA, Sesame, Erfurt)
Billions of triples as Open Data available (e.g. Wikipedia,
MusicBrainz)
Many di erent serialization formats (e.g. RDF/XML, Turtle, N3)
Makes data migration much easier

27. Description Logic and Rules OWL and RIF
What? Why?
Knowledge is spread all over the system:
Domain model, database scheme, TS con gurartion, FlexForm,
TCA, documentation, Templates ...
In di erent Formats:
SQL, TypoScript, XML, PHP, HTML ...
Using inconsistent terminology:
"Template" in TYPO3?
So, what to do?
data and metadata in the same data structure (RDF)
use well de ned languages to describe (meta)data (OWL RIF)

28. Description Logic and Rules OWL and RIF
Knublauch, Holger. KBeans Specification: Semantic Transparency for
Components and Domain Models. Technical Report FAW-TR-01001,
FAW Ulm, 2001.

29. RDF in HTML
Three di erent standards to markup your HTML code
Microformats
Microdata (part of HTML5 spec)
RDFa ("RDF for attributes", W3C Recommendation)
A subset of RDF
Makes web pages machine readable by your favorite search engine

30. RDF in HTML RDFa
<div>
<p>
Alice Birpemswick
</p>
<p>
Email: <a href="mailto:alice@example.com">alice@example.com</a>
</p>
<p>
Phone: <a href="tel:+1-617-555-7332">+1 617.555.7332</a>
</p>
</div>

31. RDF in HTML RDFa
<div prefix="foaf: http://xmlns.com/foaf/0.1/" about="http://example.com/resource/alice"
typeof="Person">
<p property="foaf:name">
Alice Birpemswick
</p>
<p>
Email: <a rel="foaf:mbox" href="mailto:alice@example.com">alice@example.com</a>
</p>
<p>
Phone: <a rel="foaf:phone" href="tel:+1-617-555-7332">+1 617.555.7332</a>
</p>
</div>

32. RDF in HTML RDFa
<div prefix="foaf: http://xmlns.com/foaf/0.1/" about="http://example.com/resource/alice"
typeof="Person">
<p property="foaf:name">
Alice Birpemswick
</p>
<p>
Email: <a rel="foaf:mbox" href="mailto:alice@example.com">alice@example.com</a>
</p>
<p>
Phone: <a rel="foaf:phone" href="tel:+1-617-555-7332">+1 617.555.7332</a>
</p>
</div>
http://example.com/resource/alice

33. RDF in HTML RDFa
<div prefix="foaf: http://xmlns.com/foaf/0.1/" about="http://example.com/alice#me" rel="knows">
<ul>
<li typeof="Person">
<a rel="foaf:homepage" href="http://example.com/bob" property="foaf:name">Bob</a>
</li>
<li typeof="Person" >
<a rel="foaf:homepage" href="http://example.com/eve" property="foaf:name">Eve</a>
</li>
<li typeof="Person" >
<a rel="foaf:homepage" href="http://example.com/manu" property="foaf:name">Manu</a>
</li>
</ul>
</div>

34. RDF in HTML RDFa
<div prefix="foaf: http://xmlns.com/foaf/0.1/" about="http://example.com/alice#me" rel="knows">
<ul>
<li typeof="Person">
<a rel="foaf:homepage" href="http://example.com/bob" property="foaf:name">Bob</a>
</li>
<li typeof="Person" >
<a rel="foaf:homepage" href="http://example.com/eve" property="foaf:name">Eve</a>
</li>
<li typeof="Person" >
<a rel="foaf:homepage" href="http://example.com/manu" property="foaf:name">Manu</a>
</li>
</ul>
</div>

35. RDF in HTML GoodRelations Vocabulary

36. RDF in HTML Enable RDFa in TYPO3
# Set the doctype and add common namespaces
config.doctype = xhtml+rdfa_10
config.namespaces {
xml = http://www.w3.org/XML/1998/namespace
xmlns = http://www.w3.org/2000/xmlns/
xsd = http://www.w3.org/2001/XMLSchema#
xhv = http://www.w3.org/1999/xhtml/vocab#
rdfa = http://www.w3.org/ns/rdfa#
rdf = http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs = http://www.w3.org/2000/01/rdf-schema#
owl = http://www.w3.org/2002/07/owl#
rif = http://www.w3.org/2007/rif#
[...]
dbo = http://dbpedia.org/ontology/
foaf = http://xmlns.com/foaf/0.1/
geo = http://www.w3.org/2003/01/geo/wgs84_pos#
gr = http://purl.org/goodrelations/v1#
cal = http://www.w3.org/2002/12/cal/ical#
og = http://ogp.me/ns#
v = http://rdf.data-vocabulary.org/#
bibo = http://purl.org/ontology/bibo/
}

37. Demo

38. EXT:semantic SPARQL Client

39. Linked Data Cloud

40. Linked Data Cloud

41. Querying a Graph SPARQL
W3C Recommendation
Graph pattern matching
Similar to SQL and Turtle

42. Querying a Graph Filter, Functions, Ordering ...

43. Querying a Graph Custom Functions

44. Querying a Graph Property Paths

45. Querying a Graph Property Paths and Inference

46. Querying a Graph Subqueries

47. EXT:semantic SPARQL Query Administration
Default namespaces
(RDFa default pro le)
Syntax highlighting
Code indentation
Content Manager

48. EXT:semantic SPARQL Query Administration
Default namespaces
(RDFa default pro le)
Syntax highlighting
Code indentation
Frontend and backend
Content Manager

49. EXT:semantic Custom Content Elements
Default layouts and custom HTML template code
Support for pagination (dynamic query re-writing)

50. EXT:semantic Custom Content Elements
Frontend Backend

51. EXT:semantic Custom Content Elements
Query results variables are bound to the template variables
and are used as labels in a human readable form

52. Demo

53. Developer
Query Object Model
class Tx_BlogExample_Domain_Repository_PostRepository extends Tx_Extbase_Persistence_Repository {
public function findByTagAndBlog($tag, Tx_BlogExample_Domain_Model_Blog $blog, $limit = 20) {
$query = $this->createQuery();
return $query->matching(
$query->logicalAnd(
$query->equals('blog', $blog),
$query->equals('tags.name', $tag)
)
)
->setOrderings(array('date' => Tx_Extbase_Persistence_QueryInterface::ORDER_DESCENDING))
->setLimit((integer)$limit)
->execute();
}
public function findNext(Tx_BlogExample_Domain_Model_Post $post) {
$query = $this->createQuery();
$posts = $query->matching($query->greaterThan('date', $post->getDate()))
->setOrderings(array('date' => Tx_Extbase_Persistence_QueryInterface::ORDER_DESCENDING))
->execute();
return $posts->getFirst();
}
}

54. Semantic TYPO3 Current Projects
SPARQL Client (EXT:semantic, Jochen Rau)
RDF/RDFa support (Sebastian Kurfürst, masters thesis)
CMS ontology (Andreas Wolf, GSoC)
Taxonomy and Categories (EXT:taxonomy, Fabien Udriot)
Semantic persistence backend (EXT:semantic, Thomas Maroschik)
Globally unique identi ers in v4 (EXT:identity, Thomas Maroschik)
Tagging support for Editors (v4: RTE plugin, v5: Aloha)

55. Semantic TYPO3 Roadmap
Improve usability of SPARQL Client
Transform Domain Models into RDF(a)
Transform OWL Ontologies into PHP Code and Metadata
Extbase Query Object Model -> SPARQL Query

56. Semantic TYPO3 Vision

57. Semantic TYPO3 Vision

58. Semantic TYPO3 Vision

59. Demo

60. Thanks!
Twitter @jocrau
Email jochen.rau@typoplanet.de
Blog http://blog.typoplanet.de
Talk Lunch