Linked Open Data as an Enabler for

Team Science

Deborah L. McGuinness Tetherless World Senior Constellation Chair

Professor of Computer and Cognitive Science

Rensselaer Polytechnic Institute, Troy, NY

& CEO McGuinness Associates, Latham, NY

Science of Team Science; LOD and Team Science April 19, 2012

Background

– Semantic Technologies – technological support for

encoding meaning in a form computers can

understand and manipulate – are maturing and

increasing in usage

– Computational encodings of meaning can be used

to help integrate, link, validate, filter,…. Essentially

to make smarter, more context-aware applications

– Semantic Technologies enable linking data … and

linked data provides a way of connecting and

traversing information, nodes, graphs, webs, …

Linked Data

• Linked Data is quite simple and follows principles set

out by Berners-Lee in

http://www.w3.org/DesignIssues/LinkedData.html

– Use URIs as names for things

– Use HTTP URIs so that people can look up those names.

– When someone looks up a URI, provide useful information,

using the standards (RDF*, SPARQL)

– Include links to other URIs. so that they can discover more

things.

– Introduction by examples and then discussion

Population Sciences Grid Goals

• Convey complex health-related information to

consumer and public health decision makers

for community health impact

• Inform the development of future research

opportunities effectively utilizing

cyberinfrastructure for cancer prevention and

control

McGuinness, D. Shaikh, A., Lebo, T, Ding, L., Courtney, P., McCusker, J., Moser,. Morgan, G.D., Tatalovich, Z., Willis, G., Contractor, N., and Hesse, B.

2012. Towards Semantically-Enabled Next Generation Community Health Information Portals: The PopSciGrid Pilot In Proceedings of Hawaii

International Conference on System Sciences 2012

4

Semantic Web Perspective on

Initial PopSciGrid Goals

• How can semantic technologies be used to integrate, present,

and analyze data for a wide range of users?

• Can tools allow lay people to build their own demos and

support public usage and accurate interpretation?

• How do we facilitate collaboration and “viral” applications?

• Within PopSciGrid:

– Which policies (taxation, smoking bans, etc) impact health and health

care costs?

– What data should be displayed to help scientists and lay people

evaluate related questions?

– What data might be presented so that people choose to make (positive)

behavior changes?

– What does the data show? why should someone believe that?

– What are appropriate follow up questions to support actionability?

5

Foundations: The Tetherless World

Constellation Linked Open Government

Data Portal

6

Create

TWC LOGD

Convert

Query/

Access

LOGD

SPARQL

Endpoint

Enhance

• RDF

• RSS

• JSON

• XML

• HTML

• CSV

• …

Community Portal

Data.gov deployment

What is an Ontology?

Catalog/

ID

General

Logical

constraints

Terms/

glossary

Thesauri

“narrower

term”

relation

Formal

is-a

Frames

(properties)

Informal

is-a

Formal

instance Value

Restrs.

Disjointness

, Inverse,

part-of…

Ontologies Come of Age McGuinness, 2001, and From AAAI Panel 99 – McGuinness, Welty, Uschold, Gruninger, Lehmann

Plus basis of Ontologies Come of Age – McGuinness, 2003

Inference Web: Making Data Transparent and

Actionable Using Semantic Technologies

• How and when does it make sense to use smart system results & how do we

interact with them?

8

Knowledge

Provenance in Virtual

Observatories

8

Hypothesis

Investigation /

Policy Advisors

(Mobile)

Intelligent

Agents

Intelligence Analyst

Tools

NSF Interops:

SONET

SSIII – Sea Ice

SPARQL to Xquery translator RDFS materialization

(Billion triple winner)

Govt metadata search

Linked Open Govt Data

SPARQL WG, earlier QL –

OWL-QL, Classic’ QL, …

OWL 1 & 2 WG Edited main OWL

Docs, quick reference,

OWL profiles (OWL RL),

Earlier languages: DAML,

DAML+OIL, Classic

RIF WG

AIR accountability tool

DL, KIF, CL, N3Logic

Inference Web, Proof

Markup Language, W3C

Provenance Working

group formal model,

W3C incubator group,

…

Inference Web IW Trust,

Air + Trust

Visualization APIs

S2S

Govt Data

Ontology repositories

(ontolinguag),

Ontology Evolution env:

Chimaera,

Semantic eScience

Ontologies, MANY other ontologies

Transparent Accountable

Datamining Initiative (TAMI)

Foundations: Web Layer Cake

PopSciGrid Workflow

CSV2RDF4LOD

Direct

SemDiff

Archive

CSV2RDF4LOD Enhance

visualize

derive derive

derive

arc

hiv

e

Publish Ban coverage

CHSI 2009

PopSciGrid Example

State -Hawaii

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Extensible Mashups via Linked Data

Diverse datasets from NIH

Potentially linking to other content (e.g.

“unemployment rate”)

Accountable Mashups via Provenance

Annotate datasets used in demos

Feedback users’ comment to gov contact (e.g. %)

Annotation capabilities coming (and more)

PopSciGrid II

Reflections

Successful but….

• What if we could allow data experts to build

their own demos?

• What if we could allow non-subject matter

experts to function as subject-literate staff?

• What if team members could interchange roles

(and thus make contributions in other areas)?

• What technological infrastructure is required?

• Claim: all of this is being done now – but not at

scale 14

Updates and Motivations from a

Computer Science Perspective

Old:

• Raw conversions

• Per-dataset vocabularies

• Custom queries

• Custom data

management code

• Limited use because of

Google Visualization

licenses

• State-level data

New:

• Enhanced conversions

• Vocabulary reuse

• Generic queries

• Re-usable data

management code

• Unlimited use of new

open source visualization

toolkit

• State and county-level

data 15

RDF Data Cube

Vocabulary

• For publishing multi-dimensional data, such as statistics, on the web in such a way that it can be linked to related data sets and concepts using RDF.

• Compatible with the cube model that underlies SDMX (Statistical Data and Metadata eXchange).

• Also compatible with: – SKOS, SCOVO, VoiD,

FOAF, Dublin Core Terms

• Integrated with the LOGD

data conversion

infrastructure

• Integrated with other tooling

like Stats2RDF

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County

average life

expectancy (Summary Measures of Health)

SemantEco/SemantAqua

• Enable/Empower citizens &

scientists to explore pollution

sites, facilities, regulations, and

health impacts along with

provenance.

• Demonstrates semantic

monitoring possibilities.

• Map presentation of analysis

• Explanations and Provenance

available

1

2 3

http://was.tw.rpi.edu/swqp/map.html and

http://aquarius.tw.rpi.edu/projects/semantaqua

4 5

1. Map view of analyzed results

2. Explanation of pollution

3. Possible health effect of contaminant (from EPA)

4. Filtering by facet to select type of data

5. Link for reporting problems

6. Now joint with USGS resource managers ; expanded to

endangered species; now more virtual observatory style

System Architecture

access

Virtuoso

19

Originally developed for VSTO, now in SSIII, SESDI, SESF, OOI …

The Virtual Solar-Terrestrial

Observatory: A Deployed Semantic Web Application Case Study for Scientific Research. Proc. 19

Conf. on Innovative Applications of Artificial Intelligence (IAAI-07),

http://www.vsto.org

Discussion

• Semantic Technologies and Linked Data are powering a wide array of application – many in Big Science, Team Science, at least interdisciplinary science

• Labeled graphs as powered by structured data can be a nice corpus for evaluation

• Tools and methodologies are ready for use

• We love to partner in these areas

• What do you need or want from linked data?

Questions? - dlm @ cs . rpi . edu

Extra

Directions

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• Incorporation of TWC data Quality Facts label (Zednik et al)

• Use of DataFAQs automated data quality framework (Lebo et al)

• Additional provenance inclusion / usage (Inference / Provenance Web)

• Annotation / Collaboration facilities (Michaelis et al)

• Other data sets? Or exposition of other parameters?

• Partners in additional topic areas

Enabling Subject Area Exploration

and Hypothesis Generation

• What factors influence prevalence (and under what conditions)?

• Within smoking, should we focus on prevalence, packs sold,

quit rate, hospital admission diagnosis, other?

• What is prevalence (definition)? And how is it measured (overall

/ in this data set)?

• What are the conditions under which the data was obtained

(date, sample set, extenuating conditions, …)

• What other data might we include? And how might we show

that data?

• What should be represented ? And how should it be

manipulated?

• What tools and services to people benefit from to explore?

Encode? Act?

Semantically-enabled advisors

utilize:

• Ontologies

• Reasoning

• Social

• Mobile

• Provenance

• Context

Patton & McGuinness.et. al

tw.rpi.edu/web/project/Wineagent

Semantic

Sommelier

Previous versions used ontologies

to infer descriptions of wines for

meals and query for wines

New version uses

Context: GPS location, local

restaurants and wine lists, user

preferences

Social input: Twitter, Facebook, Wiki,

mobile, …

Source variability in quality,

contradictions exist,

Maintenance is an issue… however

new models emerging

The Semantic Web

enables…

• New models of intelligent services

• E-commerce solutions

• M-commerce

• Web assistants

• …

• Semantic Technologies: ready for use

• Tools & tutorials available; deep apps

future planning may benefit from

consultants

• Context-aware, semantic

apps are the future

New forms of web assistants/agents that act on a

human’s behalf requiring less from humans

and their communication devices…

More info: dlm @ cs.rpi.edu