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Enhancing Blogging with Ontology: The OntoBlog Approach

The OntoBlog project integrates blogging with semantic annotation, linking blog entries to existing ontologies. This approach enriches blogs with structured metadata, improving navigation, information retrieval, and organization. The paper discusses the challenges of traditional blogging, the need for semantic structure, and the benefits of automatic and semi-automatic annotations. By employing an integrated authoring environment, OntoBlog exemplifies a new paradigm for knowledge management. This provides practical implementation insights and future directions for semantic blogging and ontology integration.

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Enhancing Blogging with Ontology: The OntoBlog Approach

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  1. OntoBlog: Linking Ontology and Blogs Aman Shakya 1, Vilas Wuwongse 2, Hideaki Takeda 1, Ikki Ohmukai 1 1 National Institute of Informatics, Japan 2 Asian Institute of Technology, Thailand SAAKM 2007, Whistler, Canada

  2. Contents • Background • Semantic Blogging • Semantic Annotation • Semantic Blogging as Semantic Annotation • The OntoBlog platform • Application Scenario • Implementation • Some experiences • Related Work • Conclusions and Future Work SAAKM 2007, Whistler, Canada

  3. Background • Blogging • Publicly accessible web-based publication of periodic articles usually in reverse chronological order • Easy authoring platform • Unstructured • Filtering, organizing, navigating is difficult • Semantic Blogging • Provides semantic structure to blog items • Enrich blog entries with metadata • Combine features of Blogging and the Semantic Web • Informal knowledge management SAAKM 2007, Whistler, Canada

  4. Semantic Annotation • Annotation • comments, notes, explanations or remarks attached to any document or a selected part of the document • Semantic Annotation • Annotation that references an Ontology • Identifies concepts and relations in documents • Intended for machines • Significance of semantic annotation • Enhanced information retrieval • Improved interoperability (Uren et al. , 2006) SAAKM 2007, Whistler, Canada

  5. Semantic Blogging as Semantic Annotation • Semantic blogging may be viewed as semantic annotation to blog entries • Link blog entries to pre-existing Ontology and instances SAAKM 2007, Whistler, Canada

  6. Linking Blogs and Ontology Semantic Annotation Blog entries Ontology SAAKM 2007, Whistler, Canada

  7. Semantic Blogging as Semantic Annotation (contd..) • Rich semantic structure of ontology can enable useful semantic capabilities • Semantic annotation can help to • Retrieve relevant resources • Navigate meaningfully • Categorize and organize contents SAAKM 2007, Whistler, Canada

  8. Semantic Annotation in Blogs • Blog entries are self-contained snippets or small contents • Blogs are used as easy platform for frequent personal publishing • Considerations for semantic annotation • Integrated authoring environment • Automation • Integrated services SAAKM 2007, Whistler, Canada

  9. The OntoBlog Platform • Semantic Annotation • Annotate blog entries with existing ontology instances • Integrated Authoring • Authoring and annotation of blog entries • Semi-automatic Annotation • Suggest related instances automatically • Integrated Services • Semantic navigation, search and organization • Feedback for Ontology Maintenance • Suggest new concepts and instances Online demo - http://dutar.ex.nii.ac.jp/ontoblog/blog/default/ SAAKM 2007, Whistler, Canada

  10. Application Scenario SAAKM 2007, Whistler, Canada

  11. System Architecture SAAKM 2007, Whistler, Canada

  12. Publishing Metadata • Blog entries may have content metadata • E.g., SWRC metadata for bibliography • Stored as RDF triplets • Metadata is exported in RSS feeds Ontology • Example ontology • Computer science department ontology • Based on SHOE computer department ontology • Populated and maintained using Protégé SAAKM 2007, Whistler, Canada

  13. Example Ontology SAAKM 2007, Whistler, Canada

  14. Inference • for_course has_topic • is_broader_thanis_narrower_than • teachestaught_by • Inverse relations • has_prerequisite , is_broader_than • Transitive relations • Used OWL Micro reasoner from Jena SAAKM 2007, Whistler, Canada

  15. Blog-Ontology Linking • Link Blogging  existing Ontology system • using Semi-Automatic Semantic Annotation • Manual annotation • Cumbersome and error-prone • May depend on willingness of users • Authenticity and quality not guaranteed • Annotation can be automated by simple language processing techniques • can be very fast and quite effective SAAKM 2007, Whistler, Canada

  16. Blog-Ontology Linking • Each concept has a “keywords” element • For each instance, the “keywords” element contains a collection of related words • Stemmed blog entries matched against stemmed “keywords” to discover related instances • Porter Stemming • Related instances automatically suggested when adding/updating blog entries • Discovered relations stored as related-to property (if the user approves) SAAKM 2007, Whistler, Canada

  17. Authoring Blog Entry Next… SAAKM 2007, Whistler, Canada

  18. Suggestions for semantic annotation SAAKM 2007, Whistler, Canada

  19. Blog-Ontology Linking SAAKM 2007, Whistler, Canada

  20. Blog-Ontology Linking Instances in Ontology Blog Entries SAAKM 2007, Whistler, Canada

  21. Semantic Navigation SAAKM 2007, Whistler, Canada

  22. Semantic Search • Simple implementation just to demonstrate applicability of semantic search • Augment traditional search results • Return blog entries linked to semantically related instances • Useful when text search alone does not produce enough results • Depth of semantic search can be controlled • Semantic search can be enabled or disabled SAAKM 2007, Whistler, Canada

  23. Semantic Aggregation • Collect and organize search results relevant to a topic of interest Algorithm • Get all relevant blog entries from search • Find the set of instances linked to each blog entry • Find all relations between the instances • Visualize the related instances as directed graphs • GraphML used SAAKM 2007, Whistler, Canada

  24. Semantic Aggregation Search results Related Entries click SAAKM 2007, Whistler, Canada

  25. Feedback for Ontology Maintenance • If related instances or concepts are not present in the Knowledge Base • users may suggest a suitable instance and/or concept • Provides web-based form for new suggestions along with the automatic suggestions • Feedback from users is useful for the administrator/knowledge engineer to maintain the ontology • by adding missing concepts and instances or refining them SAAKM 2007, Whistler, Canada

  26. Feedback form for suggesting new Concepts/Instances SAAKM 2007, Whistler, Canada

  27. Some Experiences • Simple test experiments • About 100 dummy blog entries related to different courses, topics, researches, etc populated manually • 10 students from the Computer Science department of the Asian Institute of Technology helped in the tests • Automatic blog-ontology linking • 84% right suggestions SAAKM 2007, Whistler, Canada

  28. Semantic Search Results SAAKM 2007, Whistler, Canada

  29. Some Experiences • User Feedback • Many features are subjective and difficult to evaluate by experiments • Positive user response for most of the features • Not easy to judge relevance of semantic search results SAAKM 2007, Whistler, Canada

  30. Related Work • Semantic Blogging • Semantic Blogging Demonstrator (HP labs) • Semantic Blogging using Haystack (Karger & Quan) • Semblog (Ohmukai & Takeda) • semiBlog (Möller et al.) (now renamed “Shift”) • SocioBiblog (Shakya et al.) • Semantic Annotation • semi-automatic semantic annotation – S-CREAM, extraction ontologies, etc • Magpie • Mangrove • KIM SAAKM 2007, Whistler, Canada

  31. Conclusions • Linking Blogging and Ontology management technologies • OntoBlog – Semantic Blogging prototype • Semi-automatic annotation of blog entries with existing instances of an Ontology • Integrated platform • semantic authoring, annotation and information utilization • Semantic structure of ontology can enable semantic capabilities Navigation and Search in blogs • Feedback for ontology maintenance through blogging SAAKM 2007, Whistler, Canada

  32. Future Work • Decentralized collaborative approach for Ontology • Folksonomy, Semantic Wiki, etc • Semantic capabilities across multiple blogs • Enhance inference capabilities • Incorporate mature semantic search • Ranked information retrieval • Sophisticated language processing • WordNet, IE (with supervised/unsupervised learning) • Support semantic blogging clients like semiBlog SAAKM 2007, Whistler, Canada

  33. Thank you ! • Questions / Suggestions SAAKM 2007, Whistler, Canada

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