Improving Human-Semantic Web Interaction: The Rhizomer Experience

1
Improving Human-Semantic Web InteractionThe
Rhizomer Experience

• Roberto García and Rosa Gil
• GRIHO - Human Computer Interaction Research Group
• Universitat de Lleida, Spain

2
Table of Contents

• Introduction
• Proposal
• Architecture
• Wiki Engine
• Rhizomer
• Guided tour
• Conclusions
• Future Work

3
Introduction

• Scenario semantic portal
• Framework for community knowledge sharing
• Non-expert users
• User interaction not just consumption, also
  production
• Follow Semantic Wiki style
• Facilitate production
• Keep information organised

4
Introduction

• However, most Semantic Wikis
• Mix human and machine-oriented content
• Quite unusable notation for HTML content and/or
  semantic metadata
• CategoryResearchProject
• labelRhizomer
• homepagerhizomik.net/rhizomer
• Require user aware of available classes, props,
• Difficult reuse of external data and ontologies
• More usable approaches PlatypusWiki, OntoWiki,

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Proposal

• Focus on simplicity and ease of use
• Separate HTML content and semantic metadata
• Simple wiki engine
• WYSIWYG wiki user interface
• Semantic metadata engine
• Usable semantic metadata interaction
• Common HTML interface, just the web browser

6
Architecture

• Wiki Engine manage HTML documents
• Rhizomer manage semantic metadata, about wiki
  docs or other resources

RHIZOMER
WIKI ENGINE
URL
URL
URL
URL
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Wiki Engine

• Simplicity
• Based on Java Servlets / JSPs / JavaScript
• No database required
• Store documents as HTML files
• Ease of use
• FCKEditor, http//www.fckeditor.net
• WYSIWYG interface, text processor like
• Customisable user interface
• E.g. add custom special chars

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Wiki Engine
9
Rhizomer

• Simplicity
• Abstraction layer on metadata stores (Sesame,
  Jena,).
• REST interface
• Implementation
• Java Servlets
• JSP

edit
search
new
delete
GET
PUT
POST
DEL
Rhizomer
MetadataStore
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Rhizomer

• Ease of use
• Facilitate discovering unknown metadata
• SPARQL DESCRIBE for default queries
• Web browser interface for semantic metadata
• Graph browsing mechanism
• Enable self-explanatory metadata

RDF
JavaScript
ltHTML/gt
ltHTML/gt SemFORMS
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Guided Tour query
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Guided Tour query
swrcProjectspecific properties
GET
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Guided Tour store

• Rhizomer servlet GET ? query
• SPARQL metadata store
• Jena, Sesame,
• DESCRIBE implementation
• Concise Bounded Description rdfslabels for
  all selected resources
• Query output also RDF

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Guided Tour store

• DESCRIBE R2 build CBD(R2) Fragment 2 U
  rdfslabels

label
R2
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Guided Tour response

• Show results
• Visualisation and interaction
• XSLT
• RDF to HTML
• RDF to HTML FORM
• Other options Fresnel Lenses, RDF Path,
• Use RDF labels for usability, xmllang for
  multilanguage support.

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Guided Tour interaction
ltswrcSoftwareProject rdfabout"http//rhizomik.net/rhizomer"gt ltrdfslabelgtRhizomerlt/rdfslabelgt ltswrchomepage rdfresource "http//rhizomik.net/content/rhizomer"/gt ltrdftype rdfresourceswrcResearchProject"/gt lt/swrcSoftwareProjectgt ltrdfDescription rdfaboutswrchomepagegt ltrdfslabelgthomepagelt/rdfslabelgt lt/rdfDescriptiongt
view, RDF2HTML XSLT
view, RDF2HTML XSLT
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Guided Tour interaction
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Guided Tour interaction

• Submit semantic form
• ltform methodPUT/POST onSumbitbuildMetadatagt
  ltinput typetext namehttp//...w3.org/.../rdf-
  syntax-nsID valuehttp//rhizomik.net/rhizome
  r/gt
• ltinput typetext namehttp//...w3.org/.../rdf
  -syntax-nstype valuehttp//swrcorg/ontology
  SoftwareProject/gt
• ltinput typetext namehttp//...w3.org/.../rdf
  -schemalabel/ valueRhizomer/gt
• lt/formgt
• PUT add metadata fragment
• POST delete metadata fragment for ID and add
  new metadata

ltSubject,
Predicate,Objectgt
Predicate,Objectgt
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Conclusions

• Usable framework (preliminary user tests)
• Simple and flexible
• Example Semantic Media Portal

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Future Work

• AJAX to improve user interaction
• Assisted metadata creationavailable properties,
  property values,
• Specialised visualisation and interaction
  services
• Map for geo-tagged resources, Timeline or
  Calendar for events,
• Deeper user testing

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Thank you for your attentionMore at
http//rhizomik.net

• Contact
• rgarcia_at_diei.udl.esrosa.gil_at_diei.udl.es