Apachecon 2011 stanbol_ogrisel

11/7/11

Apache Stanbol (Incubating)and the Web of Data

Olivier Grisel, [email protected], 2011-11-11

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My Background

Olivier Grisel - R&D Engineer

nuxeoOpen Source ECM

European project: IKS

Stuff I do:Machine Learning Natural Language Processing All things data

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Agenda

The Web of Data: what, why, how?

CMS integration demo

Semantic Components in Stanbol

Building models for Stanbol

The Web of Data

What, Why, How?

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“To a computer, then, the web is a flat, boring world devoid of meaning”

Tim Berners Lee, http://www.w3.org/Talks/WWW94Tim/

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“This is a pity, as in fact documents on the web describe real objects and imaginary concepts, and give particular relationships between them”


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“The Semantic Web is not a separate Web but an extension of the current one, in which information

is given well-defined meaning, better enabling computers and people to work in cooperation.”


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“Adding semantics to the web involves two things: allowing documents which have information

in machine-readable forms, and allowing links to be created with relationship values.”


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The Web of Data – What?

Shared description of the real world

oStructured with vocabularies

oDecentralized

oScoped by namespaces

oLinked

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The Web of Data – Why?• Strings are ambiguous

o New York / The Big Apple / NYCo Washington (Person, State, City, Sports Team...)

• Structured context helps humans o Who is this guy?o Where is this city?

• Conceptual frame helps machineso Explicit user intent decodingo Smarter indexing / search?

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Decoding User Intents

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Decoding User Intents

Next Generation User InterfacesSiri - conversational interfaceIBM DeepQA: Watson for Heath Care

Tell Google about your stuffPublish structured descriptions of your products"3 bedrooms flat near Montmartre"

Useful for non-public data as wellIntranet query: "ApacheCon slides"Intranet query: "Xerox invoices"Intranet query: "Xerox salesperson email"

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The Web of Data - How?

RDF / TripeStores / SparqlGraph stores with dynamic schemasStrong interoperability

JSON-LDUpgrade your JSON with scoped vocabulariesWeb / Mobile / JS developer friendly

RDFa + schema.org & rNewsPublish annotation in structured markupVocabulary understood by Search Engines

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HTML example



My name is Manu Sporny and you can give me a ring via 1-800-555-0155. <img src="http://manu.sporny.org/images/manu.png" /> I have a <a href="http://manu.sporny.org/">blog</a>.

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RDFa example



My name is Manu Sporny and you can give me a ring via 1-800-555-0155. <img rel="image" src="http://manu.sporny.org/images/manu.png" /> I have a <a rel="foaf:weblog" href="http://manu.sporny.org/">blog</a>.

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JSON-LD example

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2007 2008

20092010

Bridging the Web of Dataand my CMS

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Apache Stanbol

EnhancerText analysis with Apache OpenNLP / Tika

EntityHub / ContentHubLinked Data Indexing with Apache SolrGraph Storage with Apache Clerezza / Jena

Reasoner / RulesInference with Apache Jena & OWLApiI

Components / HTTP ServicesOSGi with Apache Felix / JAX-RS with Jersey

RESTfulis

Beautiful

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Minimalist HTTP Client

curl -X POST -H "Accept: text/turtle" \ -H "Content-type: text/plain" \ --data "John Smith was born in London." \ http://stanbol.demo.nuxeo.com/engines

Local IT infrastructure (LAN)

Nuxeo DMNuxeo DM

addon

1

1

Apache StanbolApache Stanbol

12

1

Engine 1Engine 1

Engine 2Engine 2

Engine 3Engine 3

3

DBpedia

Freebase

GeonamesLDAP

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Stanbol Enhancer

Chain of Enhancement Engines

Language Detection (Tika)

Named Entity Detection (OpenNLP)

Linked Data dereferencing (Solr)

Refactoring / Translation (Jena)

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Stanbol EntityHub

Referenced SitesDBpediaGeonames(NY Times, MusicBrainz, ProductDB, UnitProt...)

Fast local offline indices (Solr)Batch indexing utilities for RDF dumpsMultilingual fulltext search in labels & descriptions

Vocabulary mapping / merging

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Stanbol Reasoner

RDFS / OWL-lite / OWL2

Consistency checksCardinality checks: each person has 1 birth date Range constraints: birth dates are valid dates

Materializing types / propertiesTypes from subclass: Musician > Artist > PersonSymmetric property: A worked with BTransitive property: A is a located in B

Query-time expansion / inference?

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Stanbol Rules

Simple Prolog-like language uncleRule[ has(<http://example.org/family.owl#hasParent>, ?x, ?z) . has(<http://example.org/family.owl#hasSibling>, ?z, ?y) -> has(<http://example.org/family.owl#hasUncle>, ?x, ?y) ]

Sparql Construct or SWRL PREFIX family: <http://example.org/family.owl#> CONSTRUCT { ?x family:hasUncle} ?y } WHERE { ?x family:hasParent ?z . ?z family:hasSibling ?y}

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Online Demos

Simple analyzer with small index https://stanbol.demo.nuxeo.com

All services deployed http://dev.iks-project.eu:8081

Building Stanbol Enhancer models from Wikipedia

with the Apache data tools

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Universal Topic Classification

UseApache Lucene / Solr MoreLikeThis

to perform atruncated nearest neighbors query

in theTF-IDF vector space of Wikipedia

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Universal Topic ClassificationIndex text of all articles grouped by topic

Solr MoreLikeThis query on new document

DBpedia dumps provide:Text summaries for each article

“subject” relationships between articles and topics

“broader” / “narrower” SKOS hieararchy between topics

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About the Data500k purely technical categories

“People_with_missing_birth_place”, “Rivers_in_Romania”

70k “semantically grounded” categories

Paths to roots require both “technical” and “grounded” categories

Scale:1.2M topic / topic links30M topic / article links

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Some results (Wikinews)US children who celebrate Independence Day more likely to become Republicans, says Harvard study

FireworksVoting theoryRepublican Party (United States)StatisticsElectoral systems

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Some results (Wikinews)U.S. space agency NASA sues ex-astronaut

American astronautsAviation halls of fameEdwards Air Force BaseApollo programExploration of the Moon

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Some results (Wikinews)Hundreds of thousands of British public sector workers strike over planned pension changes

Retirement in the United KingdomUnited Kingdom pensions and benefitsPensions in the United KingdomLabor disputes by countryLabor disputes

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Some results (PLoS One)Metabolic Programming during Lactation Stimulates Renal Na+ Transport in the Adult Offspring Due to an Early Impact on Local Angiotensin II Pathways

Renal physiologyKidneyNephrologyHypertensionMembrane biology

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Wrap Up

Web of Databrings Sructured Context Frameto decode User Intention

NLP + Entities & Topics indicesto automate Content Enrichmentto provide Disambiguationn

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Resources

Documentation, svn, mailing list: http://incubator.apache.org/stanbol

IKS project blog: http://blog.iks-project.eu

Blog posts about Semantic ECM: http://blogs.nuxeo.com/dev/semantic/

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Thank you for your attention!

Olivier Grisel

[email protected]

https://twitter.com/ogrisel

Training models for NER from Wikipedia

Extract sentences with link positions in Wikipedia articles

DBPedia to the find type of the target entity (Person, Location, Organization)

Apache Pig scripts to compute the join + format the result as training files for OpenNLP

Apache OpenNLP to build and evaluate the models

Apache Hadoop / Apache Whirr for distributed processing

Apachecon 2011 stanbol_ogrisel

Technology

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