Internet of Things

sunfloweremryologistData Management

Oct 31, 2013 (3 years and 8 months ago)

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Linked Data Use and the
Internet of Things

Stephan Haller, SAP Research

May 2011


The Internet
of

Things will
provide

a
massive
amount

of

data

about

the

physical

world
….

… But
how

to

make

sense
of

it

all ??



Enormous

possibilities

!!

©
2011 SAP AG. All rights reserved.

3

FIA
Budabest
,
Linked

Data Session, May 2011

An
example


After Fukushima

on
Pachube

http://community.pachube.com/node/611#3d
, 31.3.2011

©
2011 SAP AG. All rights reserved.

4

FIA
Budabest
,
Linked

Data Session, May 2011

Many

people

connected

radiation

sensors


http://japan.failedrobot.com/
, 31.3.2011

©
2011 SAP AG. All rights reserved.

5

FIA
Budabest
,
Linked

Data Session, May 2011

Cool, but …

Data
quality

of

various

sources


Accuracy

of

each

data

point


Sensor
reliability

and

availiability


Time
of

measurement


Important

for

trust
!

Unit
jungle
:


nGy
/s,
mSv
/h,
μ
Sv
/h,
Bq
/kg,
cpm




Sometimes

misleading
,
sometimes

just
hard

to

compare


Mix
of

data

sources


Real
sensors


Virtual
sensors

(
data

scraping

from

web
pages
, e.g.,

http://www.houshasen
-
pref
-
ibaraki.jp/present/result01.html
)


©
2011 SAP AG. All rights reserved.

6

FIA
Budabest
,
Linked

Data Session, May 2011

Integration
of

data

from

various

sources


Annotation


Comparability


Ready
-
made

consumption

by

other

services

and

applications


How can Linked Data help?

Novel Applications &

Infrastructure Services

Integrated „View“
of Linked Resources

Information
Integration &
Federation

Graph
-
based

Models

Legacy
Systems

Web
pages

Linked Data,

Services,
Processes

Information
Visualization

& Navigation

Information
Integration

Service
Consumption



LOD Cloud



linked wrt. To terms & processes



RDF representation

linkable

Data

Annotation

(semi
-
)
automated
Analysis

“RDF 4
Sensors”

©
2011 SAP AG. All rights reserved.

7

FIA
Budabest
,
Linked

Data Session, May 2011

The
Promise

of

Linked

Data
for

IoT


Interoperable
IoT

knowledge layer on top
of emerging
IoT

architectures


Vocabularies and
ontologies

to represent
IoT

resources and data according to linked data
standards


Unified query processing and reasoning for
highly dynamic
spatio
-
temporal
IoT

data across
a multitude of
IoT

resources



Run
-
time query plan optimization algorithms





©
2011 SAP AG. All rights reserved.

8

FIA
Budabest
,
Linked

Data Session, May 2011

But
is

Linked

Data
really

suitable

for

the

IoT
?

Who
to

annotate
?


RDF
cumbersome


Incentives
?


Automation
possible
?


Where

is

the

annotation

and

the

processing

done
?


Constrained

environments


Balance
between

edge

and

network


Static

vs.
streamed

data


Data
from

sensors

as

streams

of

(
mostly
)
irrelevant
data


©
2011 SAP AG. All rights reserved.

9

FIA
Budabest
,
Linked

Data Session, May 2011

W3C
Efforts

underway

SPARQL Query Language for RDF


W3C recommendation


IoT
-
specific issues to be addressed:


Spatio
-
temporal properties of
IoT

data


Continuous query processing involving multiple data sources

Binary RDF Representation for Publication and
Exchange (HDT)


W3C Submission


Header
-
Dictionary Triples


Constrained environments

W3C Semantic Sensor Network Incubator Group


Bring sensor data to a semantic level


Capabilities of sensors


Linked
Stream

Data




©
2011 SAP AG. All rights reserved.

10

FIA
Budabest
,
Linked

Data Session, May 2011

And

a final
set

of

questions



Social
-
network
-
like

providers


Individuals

are

putting

sensors

and

data

on
the

web


How

reliable

are

these
?


Data
quality


Availability


What

incentive

is

necessary

so
that

they

provide

RDF
annotations
?


Commercial
providers


Guarantueed

SLAs


New
business

models

and

roles

needed
?


How

to

commercialize
, e.g., (
micro
-
)
billing

for

service
/
data

use
?

©
2011 SAP AG. All rights reserved.

11

FIA
Budabest
,
Linked

Data Session, May 2011

Summary

Using

Linked

Data
for

the

IoT

could

form
the

basis

for

an interoperable
knowledge

layer

about

the

physical

world


Possibly

new

business

roles

and

players

emerging


But
there

are

challenges



Annotation /
metadata

required


Constrained

environments


Streamed

data





Thank You!

Stephan Haller

Development Architect


Internet of Things

SAP Research CEC Zürich



SAP (Schweiz) AG

Kreuzplatz 20

CH
-

8008 Zürich

T

+41 58 871 78 45

F

+41 58 871 78 12

E

stephan.haller@sap.com


Danke

ありがとう

Merci



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