Building a Semantic IntraWeb with Rhizomer and a Wiki

1
Building a Semantic IntraWeb with Rhizomer and a
Wiki

• Roberto Garcia and Rosa Gil
• GRIHO (Human Computer Interaction Research Group)
• Universitat de Lleida, Spain

2
Table of Contents

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

3
Introduction

• IntraWebs group information sharing needs
• Web technologies interaction issues, easy
  consumption / difficult production
• Wiki technologies distributed production,
  difficult to keep information organised
• Semantic Web technologies ontology for shared
  conceptualisations

4
Proposal

• Wiki Semantic Web Mix
• Facilitate production
• Keep information organisation
• Focus on simplicity and ease of use
• Simple wiki engine
• WYSIWYG wiki user interface
• Simple semantic metadata engine
• Non RDF user interaction
• Common HTML interface, just the web browser

5
Architecture

• Wiki Engine manage HTML documents
• Rhizomer manage semantic metadata about them

WIKI ENGINE
RHIZOMER
URL
URL
URL
URL
6
Wiki Engine

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

7
Wiki Engine
8
Rhizomer

• Simplicity
• Abstraction layer on metadata stores (Sesame,
  Jena,).
• Common SOAP interface RDF/ACL conversations
• Implementation
• Java Servlets
• JSP
• JavaScript

SOAP
AgentCommun.Language
Rhizomer
MetadataStore
9
Rhizomer

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

RDF
JavaScript
ltHTML/gt
ltHTML/gt SemFORMS
10
Rhizomer Architecture

11
Guided Tour user input

• Property Value NOTE default
  namespace RDF/ACL
• Semantics-enabled HTML Forms.

ltform name"search" method"post"
actionRDFSOAPSender" onSubmit"search.conten
t.value buildRQL(search)"gt ltinput
name"http//purl.org/dc/elements/1.1/title"
type"text"/gt ltselect name"http//www.w3.org/1
999/02/22-rdf-syntax-nstype"gt ltoption
value"http//rhizomik.net/.../MP7Genres.rdfsMusi
c"gt... lt/selectgt ... ltinput type"hidden"
name"performative" value"query-ref"gt ltinput
type"hidden" name"sender" value"search.html"gt
ltinput type"hidden" name"receiver"
valuerhizomer"gt ltinput type"hidden"
name"language" valueSeRQL"gt ltinput
type"hidden" name"content" value""gt ltinput
type"hidden" name"reply-to" value"results.jsp"gt
lt/formgt
visible
hidden
search.htmlJavaScript
RDFSOAPSender
Search Form Submit
SOAP(RDF/ACL)
Rhizomer
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Guided Tour message content

• On submit JavaScript
• performativequery-ref ? search.contentbuildSeRQL
  (search) Property Value
  NOTE built from visible form elements
• performativeinform ? search.contentRDF
  metadata to insert or delete.

select graph(S) from  Shttp//purl.org/dc/elem
ents/1.1/titleY0, Shttp//www.w3.org/.../22-
rdf-syntax-nstypeY1where Y0 like The Best
of and Y1http//rhizomik.net/.../MP7Genres.r
dfsMusic
search.htmlJavaScript
RDFSOAPSender
Search Form Submit
SOAP(RDF/ACL)
Rhizomer
13
Guided Tour message structure

• RDFSOAPSender servlet FORM submission à
  SOAP(RDF/ACL) Property Value
  NOTE built from hidden form elements
• or aclinform / aclinform-not for
  insert/delete
• then send it to aclreceiver URL.

ltSOAP-ENVEnvelope xmlns gt ... ltSOAP-ENVBodygt
ltrdfRDF xmlnsaclhttp//daml.umbc.edu/acldaml
...gt ltaclquery-refgt ltaclsendergthttp//rhizomik
.net/rhizomer/search.htmllt/aclsendergt ltaclrecei
vergthttp//rhizomik.net/rhizomer/brokerlt/aclrecei
vergt ltacllanguagegtRQLlt/acllanguagegt ltaclconte
nt parseTypeLiteralgtselect graph(S)...lt/aclcon
tentgt ltaclreply-togthttp//rhizomik.net/rhizomer/
results.jsplt/aclreply-togt lt/aclquery-refgtlt/rdf
RDFgt lt/SOAP-ENVBodygt lt/SOAP-ENVEnvelopegt
search.html JavaScript
RDFSOAPSender
Search Form Submit
SOAP(RDF/ACL)
Rhizomer
14
Guided Tour broker routing

• Web Service, SOAP interface.
• Common access point.
• Semantic routing input message to appropriate
  StorePeers, considers
• acllanguage, aclsender, aclreceiver,

SOAP(RDF/ACL)
RDF/ACL inform
Rhizomer
MetadataStorePeer
RDF/ACL query-ref / inform
15
Guided Tour store peer

• JXTA(RDF/ACL) messages.
• Implementations for RDF stores (and QL)
• Sesame StorePeer (SeRQL),
• Input processing
• performative ? query/insert/delete.
• aclcontent à query or metadata.
• Query output also RDF/ACL.
• Problem not usual RDF stores output RDF

SOAP(RDF/ACL)
RDF/ACL inform
Rhizomer
MetadataStorePeer
RDF/ACL query-ref / inform
16
Guided Tour build response graph

• For all Resources R selected by query
• Algorithm graph(R) Build graph of depth 1 from
  selected resources R. Blank node closure

17
Guided Tour join responses

• Rhizomer
• Receives StorePeers RDF responses.
• Joins responses into unique RDF model.
• Return RDF/ACL message to RDFSOAPSender.
• aclcontent RDF Model serialisation

SOAP(RDF/ACL)
RDF/ACL inform
Rhizomer
MetadataStorePeer
RDF/ACL query-ref / inform
18
Guided Tour response presentation

• RDFSOAPSender
• Redirect to aclreply-to URL for presentation.
• Result page
• Visualisation
• XSLT RDF to HTML or RDF to HTML FORM
• Inference XSLT RDF to SVG
• Other alternatives RDF Path,
• Use RDF labels for usability, multilingual
  support.

results.jsp XSLT
ResultsReturn
RDFSOAPSender
SOAP(RDF/ACL)
Rhizomer
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Guided Tour visualisation
ltswrcSoftwareProject rdfabout"http//rhizomik.net/rhizomer"gt ltrdfslabelgtRhizomerlt/rdfslabelgt ltswrchomepage rdfresource "http//rhizomik.net/content/rhizomer"/gt ltrdftype rdfresourceswrcResearchProject"/gt lt/swrcSoftwareProjectgt
view, RDF2HTML
edit, RDF2HTMLForm
view, RDF2HTML
search
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Conclusions

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

21
Future Work

• AJAX to improve user interaction
• Support back button
• Assisted metadata creation
• In deep user testing at the
• Metadata trust based on RDF signatures
• Fine grained access control

22
Thank you for your attentionMore at
http//rhizomik.net

• Contact
• roberto_at_rhizomik.netrosa.gil_at_diei.udl.es