Interacting with Linked Data Part IV: Information Workbench

Agenda

• Part 0: Welcome

• Part I: General Introduction to Semantic Technologies

• Part II: Advanced Concepts

• Part III: OWLIM

• Part IV: Information Workbench

• Part V: Hands-on

Music!

3

Visualization Module

Metadata

Streaming providers

Physical Wrapper

Downloads

Dat

a ac

qu

isit

ion

D2R Transf. LD Wrapper

Musical Content

Ap

plic

atio

n

Analysis & Mining Module

LD D

atas

et

Acc

ess

LD Wrapper

RDF/ XML

Integrated Dataset

Interlinking Cleansing Vocabulary

Mapping

SPARQL Endpoint

Publishing

RDFa

Other content

fluidOps Portfolio

fluidOps Platform

Cloud Management Semantic Data Management Flexible & Data-driven UI

Pla

tfo

rm

SDK

Sa

mp

le S

olu

tio

ns

Protein Engineering

Portal

Scalable End-User Access to Big Data

Dynamic Semantic Publishing

@

Linked Data Approch to

Drug Research

Public Portal for Complex

Demo Application Landscapes

IT Transparency & Data Center

Intelligence for large Hosters

Data Providers Data Widgets Templates Ontology Configuration Workflows Rules API

Pro

du

ct

On demand. On time. Ready to run For a World Where All Data is Linked

Image Library

Managementfor Complex

Demo Application Landscapes

Par

tne

r P

rod

uct

s &

So

luti

on

s

Open Technologies & Standards

REST

JDBC

User Interface Concept: One Page URI

Resource page

RDF Graph

Resource page

Resource page

Resource page

Information Workbench User Interface

Navigation

Back to Information Workbench Start Page

Print view of current page

Search panel

Admin pages

Help content

Login screen

User Interface Concept: One Page URI

Resource page

RDF Graph

Resource page

Resource page

Resource page

Different Views on Every Resource

Wiki View

Table View

Graph View

Pivot View

How to Get Data into the System?

• Data Management based on Sesame framework • Open Source, written in Java

• Layered architecture for semantic data management

• Easy to plug in new data management components on demand

REST

Sesame Access API

SAIL API

Stable (yet extensilble) APIs for data access, manipulation, ...

SAIL 1 (e.g. Query Optimization Layer)

SAIL 2 (e.g. Distributed Query Execution Layer)

DB1 DB2 DB3

Stackable architecure of custom data management components

Easy integration by implementing a generic API

Data Providers

Data providers support the periodic extraction & integration from external data sources into a central repository

• Parametrizable (e.g. connection information, refresh interval, ..)

• Built-in UI for instantiating providers

• Intuitive interfaces for writing own, customized providers (see SDK)

Relational DB Provider

User-defined Provider

SOAP Provider REST Provider

RDF Connector

Metadata Connector

R2RML

XML2RDF

Example: XML Provider

Retrieve XML Data

RDF Mapping

dbpedia:Karlsruhe

“tobias.mathaess@fluidops.com”

foaf:mbox

:residence

:Tobias

foaf:firstName

rdf:type

foaf:Person

“Tobias”

“Mathaess”

foaf:lastName

Store

:

“

”

”

“

”

”

:

:

:

:

Database

Example: Script Provider

Step 1: instantiate a new Script Provider in the UI

Step 2: implement groovy script, e.g. extracting custom data from relational databases

Instantiating Data Providers

Example: instantiating an RDF provider for the wine ontology located at http://www.w3.org/TR/owl-guide/wine.rdf.

Search and Querying

• Several possibilities

• Keyword search (Wiki and/or structured data)

• Structured SPARQL queries

• Faceted Search

SELECT ?project ?area ?grant

WHERE {

?project rdf:type foaf:Project .

?project research:area ?area .

?project research:grant ?grant .

}

Keyword Search: Structured Search:

Keyword Search vs. Structured Search

Skeleton query for keyword-based search:

SELECT ?Subject ?Property ?Value ?Type

WHERE {

{

SELECT ?Subject ?Property ?Value

WHERE {

?Subject search:matches ?match .

?match search:query "??" ;

search:property ?Property ;

search:snippet ?Value ;

search:score ?score .

} ORDER BY DESC(?score) LIMIT 1000

}

OPTIONAL { ?Subject rdf:type ?Type . }

}

Structured Search

SELECT *

WHERE {

?s ?p ?o.

}

Hybrid Search

• Combine capabilities of full-text and structured search SELECT ?Subject ?Property ?Value ?Type

WHERE {

{

SELECT ?Subject ?Property ?Value

WHERE {

?Subject search:matches ?match .

?match search:query "person";

search:property rdfs:label;

search:snippet ?Value;

search:score ?score.

} ORDER BY DESC(?score) LIMIT 1000

}

OPTIONAL { ?Subject rdf:type ?Type . }

}

Query answer: All triples that have rdfs:label as their property and a match with the string „person“ in their subject.

Pivot View

Widget-based User Interface

Analytics and Reporting Visualization and Exploration

Mashups with Social Media Authoring and Content Creation

Widgets are not static and can be integrated

into the UI using a Wiki-style syntax.

Adding Widgets to Wiki - Example

{{ #widget : BarChart

| input = 'region'

| output = {{ 'sumGrant' }}

| query = ‘

SELECT (SUM(?grant) AS ?sumGrant) ?region

WHERE {

?role :grant ?grant .

?role :region ?region .

?region :name ?regionname .

}

GROUP BY ?region’

}}

Information Workbench – Widgets

Example:

{{ #widget : TableResult

| query = 'select distinct ?type where

{?s rdf:type ?type.}'

| width = '700'

}}

General Form:

{{ #widget: WIDGETNAME

| PARAM1 = 'ARGS1'

| PARAM2 = 'ARGS2'

}}

Information Workbench – Widgets

• Go to a new wiki page http://optique.fluidops.net/resource/Widget123Page

• Change to the Edit View

Tabular Listing of Widgets

Charts: • Bar Chart • Heat Map • Line Chart • Pie Chart • Radar Chart • Stock Chart

Authoring: • Data Input • New Instance • Triple Editor

Visualization: • Google Map • Graph • Image • Pivot • Tag Cloud • Tree Result • Timeline • Timeplot • Query Result • Search • Table Result

Social Media: • News • Skype • Twitter • YouTube

User-defined Widgets

Additional Information & Hints

• Detailed SDK documentation is available at • Help:Developers (e.g. http://localhost:8888/resource/Help:Developers)

• How to write a widget • Help:WidgetSDK

• How to write a provider • Help:ProviderSDK

Instance Pages vs. Templates

Page content is composed based on a template concept:

Barack Obama

rdf:type

• Wiki template Template:foaf:Person • Table view config for foaf:Person • Graph view config for foaf:Person • Pivot view config for foaf:Person • Additional widget definitions for foaf:Person request for

dbpedia:Barack_Obama

foaf:Person

Resource page

• Wiki view for dbpedia:Barack_Obama • Table view for dbpedia:Barack_Obama • Graph view for dbpedia:Barack_Obama • Pivot view for dbpedia:Barack_Obama • Additional widget definitions for

dbpedia:Barack_Obama

+

Combined information from template definition and specific instance (giving instance config a priority)

Building Solutions

Package functionality together:

• Custom wiki pages

• Custom template pages

• Custom widgets

• Custom data providers

Solution deployment: • Built as single ZIP file • Can be copied into IWB to make

functionality available and running

Additional Information & Hints

• Detailed SDK documentation is available at • Help:Developers (e.g. http://localhost:8888/resource/Help:Developers)

• How to write a widget • Help:WidgetSDK

• How to write a provider • Help:ProviderSDK

Summary

You have seen so far …

• Information Workbench wiki and data model

• Possibilities for keyword search and semantic-based search

• How to build custom visualization of your data

• How Linked Data enables browsing-based application

• The IWB solution concept

THANK YOU!

Contact us fluid Operations AG Altrottstr. 31 69190 Walldorf Germany Tel: +49 (0) 6227 3846-527 Fax: +49 (0) 6227 3849-565 E-Mail: sales@fluidOps.com www.fluidOps.com