2007 03 12 Swecr 2

A content model/API which unifies Wikis, RDF, binaries, CDS, iMapping, WIF To be used in NEPOMUK, WAVES, WIF and beyond Max Völkel (FZI) with a lot of help from Mikhail Kotelnikov (Cognium Systems), Tim Romberg (FZI), and Heiko Haller (FZI) 8.3.2007

History ,[object Object],[object Object],[object Object],[object Object]

Inputs to this document ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is a wiki? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is a semantic wiki? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Integration of legacy wikis ,[object Object],[object Object],Legacy Wiki JWiki XHTML Wiki Syntax WIF+RDF WAF.zip HTTP  documented in http://xam.de/2006/2006-12-19-SA-Andreas-Kurz.pdf No longer a core part of the content API. But a pragmatic tool to ease migration of wiki content.

JWiki – An API to access (semantic) wikis (fomerly known as the WIF API) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Note: This API is not the final content API. This is just a simple web-wiki-wrapping API. The content API can be inspired by this.

WIF in a nutshell see also http://wiki.ontoworld.org/wiki/WIF ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],WIF

WIF example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Not required Not required WIF

Generalised Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Identified orthogonal requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Building Blocks - Who calls whom? To simplify: We can use RDF both as Triple Model and as String Store… Binary Store URI  stream + mimetype Versioning per resource Triple Model Metadata: (URI, URI, URI) Versioning per model Keyword Index URI  fulltext index Content Server String Store URI  String (can contain XHTML) Versioning per resources

Building Blocks Binary Store URI  stream + mimetype Versioning per resource String[] index() Client ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Keyword Index URI  fulltext index Content Server GET/POST resources RESTful HTTP Add/remove (URI +text) Add/remove( URI + text ) URI +type SPARQL qeuries, GET/PUT RDF files URI[] search( query ) (URI+String)[] complete(…) Access Rights? Authentication?

A closer look on the metadata layers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Idea: give each content literal a URI - makes versioning and annotation easier ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Linking of content snippets is at application layer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

XHTML and RDF ,[object Object],[object Object],[object Object],[object Object],String-content could also be in a separate store, but it‘s convenient to implement first like this. Named Items can be treated as concepts – even if their name is versioned

XHTML and RDF ,[object Object],[object Object],<html> <head>…</head> <body>… … This grey animal lives in <span id=„123“>Africa</span>… … </body> </html> :y c:hasContent Elephant :x c:hasContent Implicitly defines: :y#123 c:hasContent . :y c:contains :y#123 . Africa Statements Strings ? Mapping URI = base URI + ‚#‘ + XML ID These triples can be copied to RDF, to enable queries for them

B: Binding (or Mapping) - links XHTML elements to RDF URIs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Model Layer Cake Upper layers build on lower layers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Implemention Ideas

Ontology Layer Cake ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Multiuser API can be used locally or remote binaries WIF RDF Server Content web server Client Content API Content API User interface ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Content Server Impl HTTP Content web client HTTP Web

Content and Naming ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is a semantic content repository? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Core concepts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Model Repository Mime-type Addressable Triple Item Content Any binary or character stream URI User ItemVersion 1 root item URI URI URI URI 1:1 1:* URI ModelVersion URI 1 current version User Change date Change date 0..1 current version. No current version: Item does not exist

Simplified Data Model – no versioning Repository Mime-type Item Content Any binary or character stream URI 1 root item 1:1 1:* 0..1 content Addressable Triple URI URI URI URI User Change date

The Content API ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Webifying the API ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Next Steps ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Requirements from different sides

WAVES (sorry it‘s german) SWE-spezifische Funktionen Suche Rechte- verwaltung Orgamodell Rollen, Gruppen, .. Artikulieren, Vernetzen/Referenzieren Restrukturieren Überarbeiten Wissen kontextabh. automatisch anbieten (Freie) Sichten bilden Desktop-Integration E-Mails / Office / Browser Synchronisation (Offline, Sharing) SW-Projekt- Cockpit Polarion Anforderungs- verwaltung Meeting- Protokolle essentiell wichtig zukünftig setzt voraus Grundfunktionen Weitere allgemeine Funktionen Persönlicher Wissensspeicher

Existing approaches for linking XHTML and RDF ,[object Object],[object Object],[object Object]

Finding a good name ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Todos ,[object Object],[object Object],[object Object],[object Object]

OLD slides kept here as a backup

What you can GET and PUT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],XHTML WIF RDF WMO

First Try: Semantic Wiki Semantic Wiki Syntax DOM XHTML HTTP RDFa RDFa API WIF using WMO WAF = n WIF pages WOM + RDF Serialisation/ Standard Java API Conceptual model Structured document Semantically annotated doc. XML Wiki application Semantic Wiki Syntax Semantic Wiki Syntax User interface Semantic wiki page Complete sem. wiki content WAF API Semantic Wiki Semantic Wiki = existing Collaboration-API WEM Content Communication Knowledge model 1 RDF Model+ n WIF CDS API Exchange-API iMapping SwingClient

Two Content Layers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],<a href=„Africa“ rel=„ex:livesIn“> Africa </a> 001011010110101010101010101110101110 binary User:Max Africa User:Mikhail „ Gray“ „ 2007-03-08“^^xsd:_date Elephant hasContent hasContent hasContent hasAuthor changeDate hasColor livesIn

Content Server API ,[object Object],[object Object],[object Object],[object Object],[object Object]

2007 03 12 Swecr 2

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2007 03 12 Swecr 2