persistent annotations deserve new uris abdulla alasaadi [email protected] old dominion university...
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Persistent Annotations Deserve
New URIs
Abdulla [email protected]
Old Dominion University
Michael L. [email protected]
JCDL 2011Ottawa, CanadaJune 15, 2011
This work supported in part by NSF IIS-1009392.
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Introduction• An annotation can be described as a relation between
different resources with different media types like text, image, audio, or video.
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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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Annotation Example
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OAC Modelhttp://annota.com/RDF/343.rdf
http://bioweb.uwlax.edu/bio203/s2007/shahrach/map.JPG
http://bit.ly/g55gvD
• OAC specifies the relations between resources.• Associates annotations with resources.• Describes the annotation.
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W3C Media Fragments
• What part of the resource are we annotating?• Media fragment specification does not support the non-rectangular shapes.• SVG technology allows users to select particular parts of the images of any
shape.
The fragment URI for a rectangle part http://www.example.com/img.png#xywh=100,200,360,260
With SVG
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Annotation with SVGhttp://annota.com/RDF/343.rdf
urn:uuid:2AB92A55-6325-43D4-421D-D9DFB7ADA59E
http://bioweb.uwlax.edu/bio203/s2007/shahrach/map.JPG
http://bit.ly/g55gvD
http://annota.com/SVGs/image344.svg
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Annotation’s URI
http://128.82.5.41:8080/cgi-bin/retrieve.py?svg=344
http://bit.ly/i2AfwN
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Annotation’s resources• Resources may:
o Move [location]o Change [updated] o Disappear
• Resources will be pushed to WebCite archive.
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Annotation’s resources
• Each resource has an archived copy.
• Resources may:o Move [location]o Change [updated] o Disappear
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Archive the Resources
• How can we keep track of all these resources?
@ @
# #
$
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Resource Map
• The URIs and the relation between these URIs are represented with Resource Maps and Link headers.
• A Resource Map is generated for every annotation.
• Lists all the associated resources to this annotation and the relationship between them.
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(A) The annotation
uu1
oac:hasBody oac:hasTarget
oac:constrainsoac:constrainedBy
Ex:Anno
ex:AFRICA
ex:Tusk
ex:svg
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(B) Adding mementos
M-2
M-1
uu1
M-4
M-3
oac:hasBody
memento
oac:hasTarget
oac:constrainsoac:constrainedBymemento
memento
memento Ex:Anno
ex:AFRICA
ex:Tusk
ex:svg
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(C) Resource Map to aggregate
resources
Agg
M-2
M-1
uu1
M-4
M-3
ReM
oac:hasBody
memento
oac:hasTarget
oac:constrainsoac:constrainedBymemento
memento
memento Ex:Anno
ex:AFRICA
ex:Tusk
ex:svg
ore:describes
ore:aggregates
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Implementation• Two main Services:
o Create and share the annotation.o 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://bit.ly/i2AfwN
Create The Annotation
Browser
Push to Archive
Generate RDF
Generate ReM
Shorten the URI
Annotation’s data
Annotation’s URI
Annotating online service
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Retrieve and share the annotation
http://bit.ly/i2AfwN
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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 related
• Demonstration video:• http://bit.ly/Annotate
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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 related
• Demonstration video:• http://bit.ly/Annotate
• E-mail: [email protected]
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• Backup Slides.
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RDF Syntaxex:Anno a oac:Annotation ,
oac:hasBody ex:Tusk ,oac:hasTarget uu1 .
uu1 a oac:ConstrainedTarget ,oac:constrains ex:AFRICA ,oac:constrainedBy ex:svg .
ex:svg a oac:SvgConstraint ,dc:format "image/svg+xml" .
ex:Tusk a oac:Body .
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http://bit.ly/i2AfwN
http://www.webcitation.org
Create The Annotation
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Browser
DBAnn. Service
Interface
Get archived URIs
SVG data
Short URI
Short URI
URI ShortnerService
Long URIURI-A
URIs
Create Response
URI-A
Archived URIs
Archives
URI_Ms
URI-A
Retrieve The Annotation
http://bit.ly/i2AfwN
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Link Header
curl -I http://128.82.5.41:8080/cgi-bin/retrieve.py?svg=334
link: <http://128.82.5.41:8080/RDFs/334.rdf> ; rel="http://www.openannotation.org/ns/hasTarget"; anchor = "http://bioweb.uwlax.edu/bio203/s2007/shah_rach/map.JPG", <http://128.82.5.41:8080/RDFs/334.rdf> ; rel="http://www.openannotation.org/ns/hasBody"; anchor = "http://128.82.5.41:8080/SVGs/image334.svg#body", <http://128.82.5.41:8080/Res/334.atom> ; rel="resourcemap", <http://www.webcitation.org/5vtIf1BwD>; rel ="memento"; datetime= "Sun, 12 Jun 2011 10:15:19 GMT", <http://www.webcitation.org/5vtIf68Cn>; rel ="memento"; datetime= "Sun, 12 Jun 2011 10:15:19 GMT"
Content-Type: text/html
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Resource Map<link rel="http://www.openarchives.org/ore/terms/aggregates" href="http://bioweb.uwlax.edu/bio203/s2007/shah_rach/map.JPG“ title="The original Target" type="image/jpg"/><link rel="http://www.openarchives.org/ore/terms/aggregates" href="http://cs.odu.edu/~aalasaad/RDF/344.rdf" title="The RDF annotation“ type="application/rdf+xml"/><link rel="http://www.openarchives.org/ore/terms/aggregates" href="http://2.bp.blogspot.com/_2ASHdLrOGi0/TNmzuwr3kKI/AAAAAAAAAzI/Y91p52Huq3s/s1600/elephant-tusks-460_1016757c-739042.jpg"title="The Body" type="image/jpg"/><link rel="http://www.openarchives.org/ore/terms/aggregates" href="http://www.webcitation.org/5xqiA4E0f" title="Archived Target" type= "text/html"/><link rel="http://www.openarchives.org/ore/terms/aggregates" href="http://www.webcitation.org/5xqhw5tI9" title="Archived RDF Annotation“ type="text/html"/>
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Resource Map Cont…<link rel="http://www.openarchives.org/ore/terms/aggregates" href="http://www.webcitation.org/5xp9A6qfn" title="Archived Body“ type= "text/html"/><oreatom:triples> <oac:Annotation rdf:about='http://cs.odu.edu/~aalasaad/RDF/344.rdf'> <oac:hasbody rdf:resource='http://128.82.5.41:8080/SVGs/image344.svg'/> <oac:hasTarget rdf:resource='http://bioweb.uwlax.edu/bio203/s2007/shah_rach/map.JPG'/> <oac:hasTargetContext> <oac:TargetContext> <oac:contextAbout rdf:resource='http://bioweb.uwlax.edu/bio203/s2007/shah_rach/map.JPG'/> <oac:when>2011-04-06T20:51:20-00:00</oac:when> <dc:type>image/gif</dc:type> </oac:TargetContext> </oac:hasTargetContext> <rdf:type rdf:resource='http://www.w3.org/2000/10/annotation-ns#Annotation'/> </oac:Annotation></oreatom:triples>