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OntoWiki Application Framework & Erfurt API

Philipp Frischmuth, profile picture
Philipp Frischmuth

The document discusses the development of linked data applications using the LOD2 stack, focusing on the OntoWiki application framework and the Erfut API. It covers key concepts, architecture, and features such as RDF model handling, access control, and SPARQL query execution. Various components and their functionalities are also explained, showcasing how they integrate to create a flexible knowledge management system.

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Creating Knowledge out of Interlinked Data Developing Linked Data Applications with the LOD2 Stack OntoWiki Application Framework & Erfurt API Philipp Frischmuth AKSW, Universität Leipzig LOD2 Presentation . 02.09.2010 . Page http://lod2.eu
Creating Knowledge out of Interlinked Data Agenda Semantic Wiki OntoWiki • Differences • Similarities • Demo Architecture • Erfurt • OntoWiki AF Use Cases ISSLOD 2011 . 2011-09-14 . Leipzig . Page 2 http://lod2.eu
Creating Knowledge out of Interlinked Data Semantic Wiki • Wiki with added semantics • Goal: Wiki pages + background knowledge base • Examples: Semantic MediaWiki, Rhizome, IkeWiki • OntoWiki takes another approach ISSLOD 2011 . 2011-09-14 . Leipzig . Page http://lod2.eu
Creating Knowledge out of Interlinked Data OntoWiki Semantic (Data-)Wiki ISSLOD 2011 . 2011-09-14 . Leipzig . Page 4 http://lod2.eu
Creating Knowledge out of Interlinked Data Conceptual Differences ISSLOD 2011 . 2011-09-14 . Leipzig . Page 5 http://lod2.eu
Creating Knowledge out of Interlinked Data Views over Articles Resource views Wiki articles ISSLOD 2011 . 2011-09-14 . Leipzig . Page 6 http://lod2.eu
Creating Knowledge out of Interlinked Data Forms over Markup Forms Wiki code ISSLOD 2011 . 2011-09-14 . Leipzig . Page 7 http://lod2.eu
Creating Knowledge out of Interlinked Data Why do you call that thing a Wiki? Conceptual Similarities ISSLOD 2011 . 2011-09-14 . Leipzig . Page 8 http://lod2.eu
Creating Knowledge out of Interlinked Data WikiWikiWeb © Andrew Laing ISSLOD 2011 . 2011-09-14 . Leipzig . Page 9 http://lod2.eu
Creating Knowledge out of Interlinked Data Wikiwiki Concepts • Everyone can edit anything • Content is edited in the same way as structure is • Activity can be watched and reviewed by everyone Ward Cunningham ISSLOD 2011 . 2011-09-14 . Leipzig . Page 10 http://lod2.eu
Creating Knowledge out of Interlinked Data Versioning Everything can be undone Philosophy: make it easy to correct mistakes ISSLOD 2011 . 2011-09-14 . Leipzig . Page 11 http://lod2.eu
Creating Knowledge out of Interlinked Data Vision 1. Generic data wiki for RDF models • No data model mismatch (structured vs. unstructured) 2. Application framework: • Knowledge-intensive applications, • Agile processes, • Distributed user groups ISSLOD 2011 . 2011-09-14 . Leipzig . Page 12 http://lod2.eu
Creating Knowledge out of Interlinked Data Demo ISSLOD 2011 . 2011-09-14 . Leipzig . Page 13 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 14 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 14 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework • PHP Framework for web applications • Extensive documentation • Outstanding code quality • BSD-licensed • Flexibly usable ISSLOD 2011 . 2011-09-14 . Leipzig . Page 15 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View • Business logic • SPARQL is here! ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View • Business logic • Components • SPARQL is here! • Controller's methods are called actions • Accessible via URLs ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View • Business logic • Components • OntoWiki_View • SPARQL is here! • Controller's methods class are called actions • Templates run in • Accessible via URLs View‘s context • View‘s variables filled within the controller ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework contd. Auth Cache Config Controller Feed Log OpenId Session Uri View XmlRpc ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 17 http://lod2.eu
Creating Knowledge out of Interlinked Data Zend Framework contd. Auth Cache Config Controller Feed Log OpenId Session Uri View XmlRpc ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 17 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 18 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 18 http://lod2.eu
Creating Knowledge out of Interlinked Data Erfurt API • Based on ZF • Components: • Triple (Quad) Store abstraction • Authentication + access control • SPARQL support • Caching • Versioning • ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 19 http://lod2.eu
Creating Knowledge out of Interlinked Data Erfurt Packages Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 20 http://lod2.eu
Creating Knowledge out of Interlinked Data Erfurt Packages Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 20 http://lod2.eu
Creating Knowledge out of Interlinked Data App package • Contains only one class: Erfurt_App • Base for every Erfurt application • Singleton pattern $config = new Zend_Config_Ini('/path/to/config.ini', 'default', true); // initialize Erfurt application $app = Erfurt_App::start($config); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 21 http://lod2.eu
Creating Knowledge out of Interlinked Data App package contd. • Access Erfurt_App instance from everywhere $app = Erfurt_App::getInstance(); • Contains shortcut methods $app->authenticate(); $app->addUser($username, $password, $email); $app->isActionAllowed($actionSpec); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 22 http://lod2.eu
Creating Knowledge out of Interlinked Data App package contd. • Grants access to required objects, e.g.: // access the Zend_Auth instance $auth = $app->getAuth(); // access the Erfurt_Ac_Default instance $ac = $app getAc(); // access the Efurt_Store instance $store = $app->getStore(); // access the Erfurt_Cache object, if caching enabled $cache = $app->getCache(); // access the Erfurt_Log object, if logging is enabled $log = $app->getLog() ISSLOD 2011 . 2011-09-14 . Leipzig . Page 23 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 24 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 24 http://lod2.eu
Creating Knowledge out of Interlinked Data Auth & Ac packages • RDF based authentication and access control • Model, action (and statement) based • Users & groups • Built-in system ontology contains vocabulary • Configurable ISSLOD 2011 . 2011-09-14 . Leipzig . Page 25 http://lod2.eu
Creating Knowledge out of Interlinked Data Auth & Ac packages contd. <sioc:User rdf:about="Admin" rdfs:label="Admin"> <rdfs:comment>This is the pre-configured Admin User.</rdfs:comment> <foaf:accountName rdf:datatype="&xsd;string">Admin</foaf:accountName> </sioc:User> <sioc:Usergroup rdf:about="AdminGroup" rdfs:label="AdminGroup"> <sysont:denyModelEdit rdf:resource="&SysOnt;"/> <sysont:grantAccess rdf:resource="&SysOnt;AnyAction"/> <sysont:grantModelEdit rdf:resource="&SysOnt;AnyModel"/> <sysont:grantModelView rdf:resource="&SysOnt;AnyModel"/> <rdfs:comment>The group of all admins. If not changed, they can trigger all actions and can edit all models but the system ontology.</rdfs:comment> <sioc:has_member rdf:resource="Admin"/> </sioc:Usergroup> ISSLOD 2011 . 2011-09-14 . Leipzig . Page 26 http://lod2.eu
Creating Knowledge out of Interlinked Data Auth & Ac packages contd. • Authenticate a user $app->authenticate('Admin', 'secretpassword'); • Logout $app->getAuth()->clearIdentity(); • Gather user information $user = $app->getAuth()->getIdentity(); • Add a new user $app->addUser($username, $password, $email); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 27 http://lod2.eu
Creating Knowledge out of Interlinked Data Auth & Ac packages contd. • Model based access control $app->getAc()->isModelAllowed('view', $modelUri); $app->getAc()->isAnyModelAllowed('view'); $app->getAc()->getAllowedModels('view'); $app->getAc()->getDeniedModels('edit'); • Action based access control $app->getAc()->isActionAllowed('RegisterNewUser'); $app->getAc()->isAnyActionAllowed(); $app->getAc()->getAllowedActions(); $app->getAc()->getDeniedActions(); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 28 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 29 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 29 http://lod2.eu
Creating Knowledge out of Interlinked Data Store package • Developers use Erfurt_Store class • Represents a triple (quad) store • Abstracts different backends • Adapter pattern ISSLOD 2011 . 2011-09-14 . Leipzig . Page 30 http://lod2.eu
Creating Knowledge out of Interlinked Data Store package contd. Erfurt_App $app->getStore(); Erfurt_Store Zend_Db Virtuoso ... PostgreSQL MS SQL MySQL SQLite Oracle ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 31 http://lod2.eu
Creating Knowledge out of Interlinked Data Store package contd. • Obtain new and existing models $app->getStore()->getModel($modelUri); $app->getStore()->getNewModel($modelUri, $baseUri, 'owl'); • Remove models from store $app->getStore()->deleteModel($modelUri); • Executes the tasks of Model classes, e.g. SPARQL, adding and removing triples • Imports and exports RDF in different formats, e.g. RDF/XML, N3, RDF/JSON ISSLOD 2011 . 2011-09-14 . Leipzig . Page 32 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 33 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 33 http://lod2.eu
Creating Knowledge out of Interlinked Data Rdf, Rdfs & Owl packages Erfurt_Rdf_Node inheritance Erfurt_Rdf_Resource Erfurt_Rdf_Literal Erfurt_Rdfs_Resource Erfurt_Rdfs_Property Erfurt_Rdfs_Instance Erfurt_Rdfs_Class Erfurt_Owl_Property Erfurt_ Owl_Instance Erfurt_ Owl_Class Erfurt_Rdf_Model Erfurt_Rdfs_Model Erfurt_Owl_Model ISSLOD 2011 . 2011-09-14 . Leipzig . Page 34 http://lod2.eu
Creating Knowledge out of Interlinked Data Rdf, Rdfs & Owl packages contd. • Add and delete statements through model class $model->addStatement($s, $p, $o, $options); $model->deleteStatement($s, $p, $o, $options); $model->deleteMatchingStatements($s, null, null, $options); • Simple way to execute SPARQL queries through model class ISSLOD 2011 . 2011-09-14 . Leipzig . Page 35 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 36 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 36 http://lod2.eu
Creating Knowledge out of Interlinked Data Sparql package • Derived from rdfapi-php (RAP) • Transforms SPARQL Queries to SQL Queries • Result renderers • Improvements and bug fixes ISSLOD 2011 . 2011-09-14 . Leipzig . Page 37 http://lod2.eu
Creating Knowledge out of Interlinked Data Sparql package contd. • Execute a SPARQL Query $model->sparqlQueryWithPlainResult('SELECT ?s ?p ?o WHERE {?s ?p ?o}'); • Result is an array containing s, p and o as keys • Values are strings ISSLOD 2011 . 2011-09-14 . Leipzig . Page 38 http://lod2.eu
Creating Knowledge out of Interlinked Data Sparql package contd. • More flexible way through store class $queryObj = Erfurt_Sparql_SimpleQuery::initWithString('SELECT...{ ?s ?p ?o }'); $app->getStore()->sparqlQuery($queryObj, 'xml'); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 39 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 40 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 40 http://lod2.eu
Creating Knowledge out of Interlinked Data Event & Plugin packages • Event dispatcher • Plugin manager • Base for Erfurt and OntoWiki plugins ISSLOD 2011 . 2011-09-14 . Leipzig . Page 41 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 42 http://lod2.eu
Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 42 http://lod2.eu
Creating Knowledge out of Interlinked Data Cache package • Caching of exspensive SPARQL queries • Uses triple patterns for invalidation • Object cache for complex/expensive results ISSLOD 2011 . 2011-09-14 . Leipzig . Page 43 http://lod2.eu
Creating Knowledge out of Interlinked Data Erfurt on Github • Erfurt is open source • Github: https://github.com/AKSW/Erfurt ISSLOD 2011 . 2011-09-14 . Leipzig . Page 44 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 45 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 45 http://lod2.eu
Creating Knowledge out of Interlinked Data Interfaces • SPARQL Endpoint • Linked Data Endpoint • WebDAV • REST API • Command Line Interface • LDAP ISSLOD 2011 . 2011-09-14 . Leipzig . Page 46 http://lod2.eu
Creating Knowledge out of Interlinked Data Extensibility • Components, Plugins, Modules, Wrapper • Views/Templates • Themes • Localizations ISSLOD 2011 . 2011-09-14 . Leipzig . Page 47 http://lod2.eu
Creating Knowledge out of Interlinked Data Access Control • Model-based • Action-based • (Statement-based) ISSLOD 2011 . 2011-09-14 . Leipzig . Page 48 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 49 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 49 http://lod2.eu
Creating Knowledge out of Interlinked Data RDFauthor • Automatically generates forms from RDFa annoated content • JavaScript library • Used within OntoWiki but independent RDFa • „Save to OntoWiki“ functionality ISSLOD 2011 . 2011-09-14 . Leipzig . Page 50 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 51 http://lod2.eu
Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 51 http://lod2.eu
Creating Knowledge out of Interlinked Data Components • Provide controller • Access via URL • Custom views (optional) • Map, OpenId, Community ISSLOD 2011 . 2011-09-14 . Leipzig . Page 52 http://lod2.eu
Creating Knowledge out of Interlinked Data Modules • „Little Boxes“ • Provide additional GUI- elements • Navigation, Login ISSLOD 2011 . 2011-09-14 . Leipzig . Page 53 http://lod2.eu
Creating Knowledge out of Interlinked Data Plugins • Register for events • Execution of arbitrary code • Manipulation of input data • Versioning, image links ISSLOD 2011 . 2011-09-14 . Leipzig . Page 54 http://lod2.eu
Creating Knowledge out of Interlinked Data Wrapper • Generate RDF data for arbitrary resources • Examples: • Linked Data • Exif • Geodata • Twitter ISSLOD 2011 . 2011-09-14 . Leipzig . Page 55 http://lod2.eu
Creating Knowledge out of Interlinked Data Extension mechanisms • Components • Modules • Plugins • Wrapper • Additional: Themes, Localizations ISSLOD 2011 . 2011-09-14 . Leipzig . Page 56 http://lod2.eu
Creating Knowledge out of Interlinked Data Use Cases ISSLOD 2011 . 2011-09-14 . Leipzig . Page 57 http://lod2.eu
Creating Knowledge out of Interlinked Data SoftWiki Platform • Collaborative requirements engineering • OntoWiki base system • Custom views ISSLOD 2011 . 2011-09-14 . Leipzig . Page 58 http://lod2.eu
Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 59 http://lod2.eu
Creating Knowledge out of Interlinked Data Caucasian Spiders • Faunistic database on spiders of the Caucasus • Taxonomy • Localities • 240k triples ISSLOD 2011 . 2011-09-14 . Leipzig . Page 60 http://lod2.eu
Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 61 http://lod2.eu
Creating Knowledge out of Interlinked Data Vakantieland.nl • Dutch tourism portal • Independent application based on Erfurt • OntoWiki for data management ISSLOD 2011 . 2011-09-14 . Leipzig . Page 62 http://lod2.eu
Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 63 http://lod2.eu
Creating Knowledge out of Interlinked Data Catalogus Professorum • Knowledge base with historical data • Teaching staff of Universität Leipzig • Generic OntoWiki with Virtuoso backend for data management • Generation of HTML pages from RDF content ISSLOD 2011 . 2011-09-14 . Leipzig . Page 64 http://lod2.eu
Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 65 http://lod2.eu
Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 66 http://lod2.eu
Creating Knowledge out of Interlinked Data OntoWiki on Google Code • OntoWiki is open source • Google Code: • http://code.google.com/p/ontowiki/ ISSLOD 2011 . 2011-09-14 . Leipzig . Page 67 http://lod2.eu
Creating Knowledge out of Interlinked Data Thank you for your attention! LOD2 Presentation . 02.09.2010 . Page http://lod2.eu
Creating Knowledge out of Interlinked Data Thank you for your attention! LOD2 Presentation . 02.09.2010 . Page Questions? http://lod2.eu

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OntoWiki Application Framework & Erfurt API

  • 1. Creating Knowledge out of Interlinked Data Developing Linked Data Applications with the LOD2 Stack OntoWiki Application Framework & Erfurt API Philipp Frischmuth AKSW, Universität Leipzig LOD2 Presentation . 02.09.2010 . Page http://lod2.eu
  • 2. Creating Knowledge out of Interlinked Data Agenda Semantic Wiki OntoWiki • Differences • Similarities • Demo Architecture • Erfurt • OntoWiki AF Use Cases ISSLOD 2011 . 2011-09-14 . Leipzig . Page 2 http://lod2.eu
  • 3. Creating Knowledge out of Interlinked Data Semantic Wiki • Wiki with added semantics • Goal: Wiki pages + background knowledge base • Examples: Semantic MediaWiki, Rhizome, IkeWiki • OntoWiki takes another approach ISSLOD 2011 . 2011-09-14 . Leipzig . Page http://lod2.eu
  • 4. Creating Knowledge out of Interlinked Data OntoWiki Semantic (Data-)Wiki ISSLOD 2011 . 2011-09-14 . Leipzig . Page 4 http://lod2.eu
  • 5. Creating Knowledge out of Interlinked Data Conceptual Differences ISSLOD 2011 . 2011-09-14 . Leipzig . Page 5 http://lod2.eu
  • 6. Creating Knowledge out of Interlinked Data Views over Articles Resource views Wiki articles ISSLOD 2011 . 2011-09-14 . Leipzig . Page 6 http://lod2.eu
  • 7. Creating Knowledge out of Interlinked Data Forms over Markup Forms Wiki code ISSLOD 2011 . 2011-09-14 . Leipzig . Page 7 http://lod2.eu
  • 8. Creating Knowledge out of Interlinked Data Why do you call that thing a Wiki? Conceptual Similarities ISSLOD 2011 . 2011-09-14 . Leipzig . Page 8 http://lod2.eu
  • 9. Creating Knowledge out of Interlinked Data WikiWikiWeb © Andrew Laing ISSLOD 2011 . 2011-09-14 . Leipzig . Page 9 http://lod2.eu
  • 10. Creating Knowledge out of Interlinked Data Wikiwiki Concepts • Everyone can edit anything • Content is edited in the same way as structure is • Activity can be watched and reviewed by everyone Ward Cunningham ISSLOD 2011 . 2011-09-14 . Leipzig . Page 10 http://lod2.eu
  • 11. Creating Knowledge out of Interlinked Data Versioning Everything can be undone Philosophy: make it easy to correct mistakes ISSLOD 2011 . 2011-09-14 . Leipzig . Page 11 http://lod2.eu
  • 12. Creating Knowledge out of Interlinked Data Vision 1. Generic data wiki for RDF models • No data model mismatch (structured vs. unstructured) 2. Application framework: • Knowledge-intensive applications, • Agile processes, • Distributed user groups ISSLOD 2011 . 2011-09-14 . Leipzig . Page 12 http://lod2.eu
  • 13. Creating Knowledge out of Interlinked Data Demo ISSLOD 2011 . 2011-09-14 . Leipzig . Page 13 http://lod2.eu
  • 14. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 14 http://lod2.eu
  • 15. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 14 http://lod2.eu
  • 16. Creating Knowledge out of Interlinked Data Zend Framework • PHP Framework for web applications • Extensive documentation • Outstanding code quality • BSD-licensed • Flexibly usable ISSLOD 2011 . 2011-09-14 . Leipzig . Page 15 http://lod2.eu
  • 17. Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
  • 18. Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View • Business logic • SPARQL is here! ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
  • 19. Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View • Business logic • Components • SPARQL is here! • Controller's methods are called actions • Accessible via URLs ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
  • 20. Creating Knowledge out of Interlinked Data Zend Framework contd. Provides MVC environment Model Controller View • Business logic • Components • OntoWiki_View • SPARQL is here! • Controller's methods class are called actions • Templates run in • Accessible via URLs View‘s context • View‘s variables filled within the controller ISSLOD 2011 . 2011-09-14 . Leipzig . Page 16 http://lod2.eu
  • 21. Creating Knowledge out of Interlinked Data Zend Framework contd. Auth Cache Config Controller Feed Log OpenId Session Uri View XmlRpc ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 17 http://lod2.eu
  • 22. Creating Knowledge out of Interlinked Data Zend Framework contd. Auth Cache Config Controller Feed Log OpenId Session Uri View XmlRpc ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 17 http://lod2.eu
  • 23. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 18 http://lod2.eu
  • 24. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 18 http://lod2.eu
  • 25. Creating Knowledge out of Interlinked Data Erfurt API • Based on ZF • Components: • Triple (Quad) Store abstraction • Authentication + access control • SPARQL support • Caching • Versioning • ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 19 http://lod2.eu
  • 26. Creating Knowledge out of Interlinked Data Erfurt Packages Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 20 http://lod2.eu
  • 27. Creating Knowledge out of Interlinked Data Erfurt Packages Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 20 http://lod2.eu
  • 28. Creating Knowledge out of Interlinked Data App package • Contains only one class: Erfurt_App • Base for every Erfurt application • Singleton pattern $config = new Zend_Config_Ini('/path/to/config.ini', 'default', true); // initialize Erfurt application $app = Erfurt_App::start($config); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 21 http://lod2.eu
  • 29. Creating Knowledge out of Interlinked Data App package contd. • Access Erfurt_App instance from everywhere $app = Erfurt_App::getInstance(); • Contains shortcut methods $app->authenticate(); $app->addUser($username, $password, $email); $app->isActionAllowed($actionSpec); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 22 http://lod2.eu
  • 30. Creating Knowledge out of Interlinked Data App package contd. • Grants access to required objects, e.g.: // access the Zend_Auth instance $auth = $app->getAuth(); // access the Erfurt_Ac_Default instance $ac = $app getAc(); // access the Efurt_Store instance $store = $app->getStore(); // access the Erfurt_Cache object, if caching enabled $cache = $app->getCache(); // access the Erfurt_Log object, if logging is enabled $log = $app->getLog() ISSLOD 2011 . 2011-09-14 . Leipzig . Page 23 http://lod2.eu
  • 31. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 24 http://lod2.eu
  • 32. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 24 http://lod2.eu
  • 33. Creating Knowledge out of Interlinked Data Auth & Ac packages • RDF based authentication and access control • Model, action (and statement) based • Users & groups • Built-in system ontology contains vocabulary • Configurable ISSLOD 2011 . 2011-09-14 . Leipzig . Page 25 http://lod2.eu
  • 34. Creating Knowledge out of Interlinked Data Auth & Ac packages contd. <sioc:User rdf:about="Admin" rdfs:label="Admin"> <rdfs:comment>This is the pre-configured Admin User.</rdfs:comment> <foaf:accountName rdf:datatype="&xsd;string">Admin</foaf:accountName> </sioc:User> <sioc:Usergroup rdf:about="AdminGroup" rdfs:label="AdminGroup"> <sysont:denyModelEdit rdf:resource="&SysOnt;"/> <sysont:grantAccess rdf:resource="&SysOnt;AnyAction"/> <sysont:grantModelEdit rdf:resource="&SysOnt;AnyModel"/> <sysont:grantModelView rdf:resource="&SysOnt;AnyModel"/> <rdfs:comment>The group of all admins. If not changed, they can trigger all actions and can edit all models but the system ontology.</rdfs:comment> <sioc:has_member rdf:resource="Admin"/> </sioc:Usergroup> ISSLOD 2011 . 2011-09-14 . Leipzig . Page 26 http://lod2.eu
  • 35. Creating Knowledge out of Interlinked Data Auth & Ac packages contd. • Authenticate a user $app->authenticate('Admin', 'secretpassword'); • Logout $app->getAuth()->clearIdentity(); • Gather user information $user = $app->getAuth()->getIdentity(); • Add a new user $app->addUser($username, $password, $email); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 27 http://lod2.eu
  • 36. Creating Knowledge out of Interlinked Data Auth & Ac packages contd. • Model based access control $app->getAc()->isModelAllowed('view', $modelUri); $app->getAc()->isAnyModelAllowed('view'); $app->getAc()->getAllowedModels('view'); $app->getAc()->getDeniedModels('edit'); • Action based access control $app->getAc()->isActionAllowed('RegisterNewUser'); $app->getAc()->isAnyActionAllowed(); $app->getAc()->getAllowedActions(); $app->getAc()->getDeniedActions(); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 28 http://lod2.eu
  • 37. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 29 http://lod2.eu
  • 38. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 29 http://lod2.eu
  • 39. Creating Knowledge out of Interlinked Data Store package • Developers use Erfurt_Store class • Represents a triple (quad) store • Abstracts different backends • Adapter pattern ISSLOD 2011 . 2011-09-14 . Leipzig . Page 30 http://lod2.eu
  • 40. Creating Knowledge out of Interlinked Data Store package contd. Erfurt_App $app->getStore(); Erfurt_Store Zend_Db Virtuoso ... PostgreSQL MS SQL MySQL SQLite Oracle ... ISSLOD 2011 . 2011-09-14 . Leipzig . Page 31 http://lod2.eu
  • 41. Creating Knowledge out of Interlinked Data Store package contd. • Obtain new and existing models $app->getStore()->getModel($modelUri); $app->getStore()->getNewModel($modelUri, $baseUri, 'owl'); • Remove models from store $app->getStore()->deleteModel($modelUri); • Executes the tasks of Model classes, e.g. SPARQL, adding and removing triples • Imports and exports RDF in different formats, e.g. RDF/XML, N3, RDF/JSON ISSLOD 2011 . 2011-09-14 . Leipzig . Page 32 http://lod2.eu
  • 42. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 33 http://lod2.eu
  • 43. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 33 http://lod2.eu
  • 44. Creating Knowledge out of Interlinked Data Rdf, Rdfs & Owl packages Erfurt_Rdf_Node inheritance Erfurt_Rdf_Resource Erfurt_Rdf_Literal Erfurt_Rdfs_Resource Erfurt_Rdfs_Property Erfurt_Rdfs_Instance Erfurt_Rdfs_Class Erfurt_Owl_Property Erfurt_ Owl_Instance Erfurt_ Owl_Class Erfurt_Rdf_Model Erfurt_Rdfs_Model Erfurt_Owl_Model ISSLOD 2011 . 2011-09-14 . Leipzig . Page 34 http://lod2.eu
  • 45. Creating Knowledge out of Interlinked Data Rdf, Rdfs & Owl packages contd. • Add and delete statements through model class $model->addStatement($s, $p, $o, $options); $model->deleteStatement($s, $p, $o, $options); $model->deleteMatchingStatements($s, null, null, $options); • Simple way to execute SPARQL queries through model class ISSLOD 2011 . 2011-09-14 . Leipzig . Page 35 http://lod2.eu
  • 46. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 36 http://lod2.eu
  • 47. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 36 http://lod2.eu
  • 48. Creating Knowledge out of Interlinked Data Sparql package • Derived from rdfapi-php (RAP) • Transforms SPARQL Queries to SQL Queries • Result renderers • Improvements and bug fixes ISSLOD 2011 . 2011-09-14 . Leipzig . Page 37 http://lod2.eu
  • 49. Creating Knowledge out of Interlinked Data Sparql package contd. • Execute a SPARQL Query $model->sparqlQueryWithPlainResult('SELECT ?s ?p ?o WHERE {?s ?p ?o}'); • Result is an array containing s, p and o as keys • Values are strings ISSLOD 2011 . 2011-09-14 . Leipzig . Page 38 http://lod2.eu
  • 50. Creating Knowledge out of Interlinked Data Sparql package contd. • More flexible way through store class $queryObj = Erfurt_Sparql_SimpleQuery::initWithString('SELECT...{ ?s ?p ?o }'); $app->getStore()->sparqlQuery($queryObj, 'xml'); ISSLOD 2011 . 2011-09-14 . Leipzig . Page 39 http://lod2.eu
  • 51. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 40 http://lod2.eu
  • 52. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 40 http://lod2.eu
  • 53. Creating Knowledge out of Interlinked Data Event & Plugin packages • Event dispatcher • Plugin manager • Base for Erfurt and OntoWiki plugins ISSLOD 2011 . 2011-09-14 . Leipzig . Page 41 http://lod2.eu
  • 54. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 42 http://lod2.eu
  • 55. Creating Knowledge out of Interlinked Data Ac App Auth Cache Event Namespaces Owl Plugin Rdf Rdfs Sparql Store Syntax Uri Utils Versioning Wrapper ISSLOD 2011 . 2011-09-14 . Leipzig . Page 42 http://lod2.eu
  • 56. Creating Knowledge out of Interlinked Data Cache package • Caching of exspensive SPARQL queries • Uses triple patterns for invalidation • Object cache for complex/expensive results ISSLOD 2011 . 2011-09-14 . Leipzig . Page 43 http://lod2.eu
  • 57. Creating Knowledge out of Interlinked Data Erfurt on Github • Erfurt is open source • Github: https://github.com/AKSW/Erfurt ISSLOD 2011 . 2011-09-14 . Leipzig . Page 44 http://lod2.eu
  • 58. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 45 http://lod2.eu
  • 59. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 45 http://lod2.eu
  • 60. Creating Knowledge out of Interlinked Data Interfaces • SPARQL Endpoint • Linked Data Endpoint • WebDAV • REST API • Command Line Interface • LDAP ISSLOD 2011 . 2011-09-14 . Leipzig . Page 46 http://lod2.eu
  • 61. Creating Knowledge out of Interlinked Data Extensibility • Components, Plugins, Modules, Wrapper • Views/Templates • Themes • Localizations ISSLOD 2011 . 2011-09-14 . Leipzig . Page 47 http://lod2.eu
  • 62. Creating Knowledge out of Interlinked Data Access Control • Model-based • Action-based • (Statement-based) ISSLOD 2011 . 2011-09-14 . Leipzig . Page 48 http://lod2.eu
  • 63. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 49 http://lod2.eu
  • 64. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 49 http://lod2.eu
  • 65. Creating Knowledge out of Interlinked Data RDFauthor • Automatically generates forms from RDFa annoated content • JavaScript library • Used within OntoWiki but independent RDFa • „Save to OntoWiki“ functionality ISSLOD 2011 . 2011-09-14 . Leipzig . Page 50 http://lod2.eu
  • 66. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 51 http://lod2.eu
  • 67. Creating Knowledge out of Interlinked Data Architecture RDFauthor Extensions OntoWiki Application Framework Erfurt API Zend Framework ISSLOD 2011 . 2011-09-14 . Leipzig . Page 51 http://lod2.eu
  • 68. Creating Knowledge out of Interlinked Data Components • Provide controller • Access via URL • Custom views (optional) • Map, OpenId, Community ISSLOD 2011 . 2011-09-14 . Leipzig . Page 52 http://lod2.eu
  • 69. Creating Knowledge out of Interlinked Data Modules • „Little Boxes“ • Provide additional GUI- elements • Navigation, Login ISSLOD 2011 . 2011-09-14 . Leipzig . Page 53 http://lod2.eu
  • 70. Creating Knowledge out of Interlinked Data Plugins • Register for events • Execution of arbitrary code • Manipulation of input data • Versioning, image links ISSLOD 2011 . 2011-09-14 . Leipzig . Page 54 http://lod2.eu
  • 71. Creating Knowledge out of Interlinked Data Wrapper • Generate RDF data for arbitrary resources • Examples: • Linked Data • Exif • Geodata • Twitter ISSLOD 2011 . 2011-09-14 . Leipzig . Page 55 http://lod2.eu
  • 72. Creating Knowledge out of Interlinked Data Extension mechanisms • Components • Modules • Plugins • Wrapper • Additional: Themes, Localizations ISSLOD 2011 . 2011-09-14 . Leipzig . Page 56 http://lod2.eu
  • 73. Creating Knowledge out of Interlinked Data Use Cases ISSLOD 2011 . 2011-09-14 . Leipzig . Page 57 http://lod2.eu
  • 74. Creating Knowledge out of Interlinked Data SoftWiki Platform • Collaborative requirements engineering • OntoWiki base system • Custom views ISSLOD 2011 . 2011-09-14 . Leipzig . Page 58 http://lod2.eu
  • 75. Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 59 http://lod2.eu
  • 76. Creating Knowledge out of Interlinked Data Caucasian Spiders • Faunistic database on spiders of the Caucasus • Taxonomy • Localities • 240k triples ISSLOD 2011 . 2011-09-14 . Leipzig . Page 60 http://lod2.eu
  • 77. Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 61 http://lod2.eu
  • 78. Creating Knowledge out of Interlinked Data Vakantieland.nl • Dutch tourism portal • Independent application based on Erfurt • OntoWiki for data management ISSLOD 2011 . 2011-09-14 . Leipzig . Page 62 http://lod2.eu
  • 79. Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 63 http://lod2.eu
  • 80. Creating Knowledge out of Interlinked Data Catalogus Professorum • Knowledge base with historical data • Teaching staff of Universität Leipzig • Generic OntoWiki with Virtuoso backend for data management • Generation of HTML pages from RDF content ISSLOD 2011 . 2011-09-14 . Leipzig . Page 64 http://lod2.eu
  • 81. Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 65 http://lod2.eu
  • 82. Creating Knowledge out of Interlinked Data ISSLOD 2011 . 2011-09-14 . Leipzig . Page 66 http://lod2.eu
  • 83. Creating Knowledge out of Interlinked Data OntoWiki on Google Code • OntoWiki is open source • Google Code: • http://code.google.com/p/ontowiki/ ISSLOD 2011 . 2011-09-14 . Leipzig . Page 67 http://lod2.eu
  • 84. Creating Knowledge out of Interlinked Data Thank you for your attention! LOD2 Presentation . 02.09.2010 . Page http://lod2.eu
  • 85. Creating Knowledge out of Interlinked Data Thank you for your attention! LOD2 Presentation . 02.09.2010 . Page Questions? http://lod2.eu