Persistent Annotations Deserve New URIs

Persistent Annotations Deserve New URIs
Abdulla Alasaadi
aalasaad@cs.odu.edu
Michael L. Nelson
mln@cs.odu.edu
Old Dominion University
JCDL 2011
Ottawa, Canada
June 15, 2011
This work supported in part by NSF IIS-1009392.
1

Introduction
An annotation can be described as a relation between different resources with different media types like text, image, audio, or video.
2
http://2.bp.blogspot.com/_2ASHdLrOGi0/TNmzuwr3kKI/AAAAAAAAAzI/Y91p52Huq3s/s1600/elephant-tusks-460_1016757c-739042.jpg
http://bioweb.uwlax.edu/bio203/s2007/shahrach/map.JPG

Goals
A unique URI for every annotation.
Persistent annotations and resources.
Annotate specific part of media.
Keep track of the resources.
Present annotation in browser.
Meet the OAC model requirements.
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OAC Model
4
oac: Annotation
rdf:type

ex:Anno
oac:hasTarget
oac:hasBody

ex:Africa
ex:Tusk
OAC introduces a new resource that creates the relationship between the body and target.

Annotation Example
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http://bit.ly/g55gvD

The example in the baseline OAC model
http://128.82.5.41:8080/RDF/344.rdf
OAC specifies the relations between resources.
Describes the annotation.
6

W3C Media Fragments
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http://bioweb.uwlax.edu/bio203/s2007/shahrach/map.png#xywh=100,200,360,260
Suppose we want to identify a non-rectangular region?
Media fragment specification does not support non-rectangular shapes.
SVG technology allows users to select particular parts of the images of any shape.

Annotation’s URI
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http://128.82.5.41:8080/cgi-bin/retrieve.py?svg=334
http://bit.ly/i2AfwN
The generated URIs are long.
The annotating service shorten the Long URIs using Bit.ly API.
Easier to share, and collect statistics.
More URIs !.

Annotation’s resources
Resources may:
Move [location]
Change [updated]
Disappear .
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Each resource has an archived copy.
More URIs !

How to manage all these URIs?
Annotation:
http://128.82.5.41:8080/RDF/344.rdf
http://bit.ly/kZO9m4
http://www.webcitation.org/5zQhYKTtg
Target:
http://bioweb.uwlax.edu/bio203/s2007/shah_rach/map.JPG
http://www.webcitation.org/5zQi6eUow
Body:
http://2.bp.blogspot.com/_2ASHdLrOGi0/TNmzuwr3kKI/AAAAAAAAAzI/Y91p52Huq3s/s1600/elephant-tusks-460_1016757c-739042.jpg
http://www.webcitation.org/5zQiP22Lb
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Resource maps and link headers
Resource maps describe the aggregation of all these URIs.
Resource maps can be discovered by examining the http link response headers when dereferencing any of the URIs.
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(A) The annotation

Ex:Anno
oac:hasTarget
oac:hasBody
uu1

ex:Tusk
oac:constrainedBy
oac:constrains

ex:svg
ex:AFRICA

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(B) Adding mementos

Ex:Anno
memento
M-1
oac:hasTarget
oac:hasBody
uu1

ex:Tusk
memento
oac:constrainedBy
oac:constrains
M-2

ex:svg
ex:AFRICA
memento
M-3
memento
M-4

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(C) Resource Map to aggregate resources
ReM

Ex:Anno
ore:describes
memento
M-1
Agg
oac:hasTarget
oac:hasBody
uu1

ore:aggregates
ex:Tusk
memento
oac:constrainedBy
oac:constrains
M-2

ex:svg
ex:AFRICA
memento
M-3
memento
M-4

Implementation
Two main services:
Create and share the annotation.
Retrieve and represent the annotation.
Scalable Vector Graphs SVG.
ORE Resource Maps.
WebCite.
Bitly.
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SVG_Edit Plugin
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http://code.google.com/p/svg-edit/

Create The Annotation
Our online annotating service
Push to Archive
Generate RDF
Annotation’s data
Browser
Generate ReM
Annotation’s URI
Shorten the URI
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Retrieve and share the annotation
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Conclusion
The paper concentrates mainly on minting new URIs for the annotations.
Annotating the media fragments was made possible using the SVG and its media tags.
Using the web archives solved the issue of keeping the annotation persistent over time.
The Resource Map is the perfect solution to keep track of all the resources.
Demonstration video:
http://bit.ly/Annotate
19

Conclusion
The paper concentrates mainly on minting new URIs for the annotations.
Annotating the media fragments was made possible using the SVG and its media tags.
Using the web archives solved the issue of keeping the annotation persistent over time.
The Resource Map is the perfect solution to keep track of all the resources
Demonstration video:
http://bit.ly/Annotate
E-mail: [aalasaad] at [cs.odu.edu]
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Persistent Annotations Deserve New URIs

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