Making Web Annotations Persistent over Time

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JCDL 2010 presentation about using Memento to reconstruct the state for web resources involved in annotation.

JCDL 2010 presentation about using Memento to reconstruct the state for web resources involved in annotation.

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  • 1. Robert
Sanderson
 Herbert
Van
de
Sompel
 



rsanderson@lanl.gov
 



herbertv@lanl.gov
 



azaroth42@gmail.com
 



hvdsomp@gmail.com
 Digital
Library
Research

 and
Prototyping
Team
 Los
Alamos
Na@onal
Laboratory,
 
USA
 Persistent Web Annotations Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 2. Overview
 •  
Background
and
Research
Ques@on
 •  
Open
Annota@on
Collabora@on
 •  
Memento
 •  
Experiments
 •  
Conclusions
 Persistent Web Annotations 

Slide:
2
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 3. 10+
Years
of
Annota@on
Research
 Persistent Web Annotations 

Slide:
3
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 4. Our
2020
Vision
 web Persistent Web Annotations 

Slide:
4
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 5. Scholarship
is
Moving
to
the
Web
 •  From
silos
of
highly
curated
content
to
open
world
models
 •  Publishing
of
scholarly
communica@on
online:
 •  First
Journals
(DLib,
PLoS,
…)
 •  Then
Users
(Vivo,
ORCID,
…)
 •  Now
Data
(NVO,
OREChem,
…)
 •  Next
the
Scien@fic
Process?
(MyExperiment,
Annota@on,…)
 •  With
the
web
comes
new
challenges…
 •  Persistence
 Persistent Web Annotations 

Slide:
5
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 6. Web
Resources
Change
…
 Google Sidewiki Annotation on http://news.bbc.co.uk/ as of 2010-06-14 Persistent Web Annotations 

Slide:
6
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 7. Archived
Copy,
But
No
Annota@ons 
 Archived page from: http://www.dracos.co.uk/work/bbc-news-archive/2010/03/08/07.05.html Persistent Web Annotations 

Slide:
7
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 8. Can
We
Fix
This?
Automa@cally?
 The desired outcome: Display the correct representation of the Web Resource with the Annotation. Persistent Web Annotations 

Slide:
8
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 9. Previous
Annota@on
Persistence
Methods 
 •  Migrate
annota@ons
from
one
version
to
the
next:
 •  Seek
to
discover
new
loca@on
of
old
target
segment
 •  Otherwise
discard
the
annota@on
as
no
longer
relevant
 •  Treats
the
Annota@on
as
of
secondary
importance
 •  Focused
on
heuris@cs:
 •  Cross
format,
cross
loca@on
 •  Edited
text
in
same
document
 •  Dynamically
scaling
target
areas,
marks
of
annota@on
 •  
…
 Persistent Web Annotations 

Slide:
9
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 10. Persistent
and
Web‐Centric?
 •  OAC:


Describe
Annota@ons
in
a
Web‐centric
Model
 
 
 
 
 
 
 
 
+
 •  Memento:


Make
Naviga@ng
the
Past
Web
Easy
 
 
 
 
 
 
 
 
=
 •  Given
an
Annota@on,
display
appropriate
archived
Web
Resource?
 •  Given
an
archived
Web
Resource,
display
appropriate
Annota@ons?
 Persistent Web Annotations 

Slide:
10
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 11. Open
Annota@on
Collabora@on
 •  Focus:
 
 

 
Interoperability
between
systems
to
enable
sharing
 •  Founda@on:

 
Architecture
of
the
World
Wide
Web
 •  Framework:

 
Linked
Data
Guidelines
 •  Funding:

 
 
Mellon
Founda@on
for
18
months
 Persistent Web Annotations 

Slide:
11
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 12. OAC
Data
Model:
Basics 
 •  An
oac:Annota@on
is
an
ore:Aggrega@on
of
two
or
more
resources,
 such
that
one
(oac:Body)
annotates
at
least
one
other
(oac:Target)
 •  We
get
OAI‐ORE
en@@es
for
free
(ore:ResourceMap,
ore:Proxy)
 •  All
resources
are
regular
web
resources
 Persistent Web Annotations 

Slide:
12
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 13. OAC
Data
Model:
Basics 
 Persistent Web Annotations 

Slide:
13
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 14. OAC
Data
Model:
Segments 
 •  Most
Annota@ons
are
about
part
of
 a
resource
 •  Resources
are
atomic,
in
terms
of
 iden@fica@on
(by
a
URI)
 •  Segments
of
the
resource
apply
in
 the
context
of
the
Annota@on
 •  Solu@on:
aaach
a
Descrip@on
of
the
 Segment
of
interest
to
an
ORE
 Proxy
for
the
resource
 Persistent Web Annotations 

Slide:
14
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 15. OAC
Data
Model:
Segments 
 Persistent Web Annotations 

Slide:
15
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 16. OAC
Data
Model:
Time
 •  As
regular
web
resources,
Resource
Map,
Body
and
Target
have
 representa@ons
that
can
change
over
@me
 •  The
Resource
Map,
Body
and
Target
can
change
independently
of
 each
other
 •  If
an
Annota@on
involves
resources
as
they
existed
at
a
par@cular
 point
in
@me,
this
needs
to
be
recorded
 •  Three
different
Time
models
are
possible…
 Persistent Web Annotations 

Slide:
16
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 17. Timeless
Annota@ons 
 •  The
Annota@on
is
always
applicable,
regardless
of
the
 representa@on
served
from
the
URIs
of
the
Body
and
Targets.
 •  Example:

"This
is
the
home
page
of
CNN"
 •  Timeless
Annota@ons
do
not
need
a
special
@mestamp.
 Persistent Web Annotations 

Slide:
17
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 18. Uniform
Time
Annota@ons 
 •  The
Annota@on
is
not
always
applicable,
but
pertains
to
the
state
 of
the
Body
and
Target
at
a
single
moment
in
@me.
 •  Example:
Tweet
is
about
contemporary
state
of
a
web
page.
 •  Add
mem:when
property
to
Annota@on
 Persistent Web Annotations 

Slide:
18
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 19. Varied
Time
Annota@ons 
 •  The
Annota@on
is
not
always
applicable,
but
pertains
to
the
state
 of
the
Body
and
Target
at
different
moments
in
@me.
 •  Example:
Blog
post
is
about
previous
day's
state
of
a
web
page
 •  Add
mem:when
property
to
Proxies
for
resources
 Persistent Web Annotations 

Slide:
19
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 20. Memento
 •  We
know:
the
URI
of
the
Target
and
the
@me
it
was
annotated
 •  We
don't
know:

the
URI
where
it
is
archived
 •  We
need:

Memento
 •  Memento
wants
to
make
it
Easy
to
Navigate
the
Web’s
Past

 •  Basic
idea:

Use
HTTP
to
get
from
the
current
resource
to
the
 archived
copy
of
that
resource
at
a
given
@me,
rather
than
 searching
 Persistent Web Annotations 

Slide:
20
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 21. Issues
with
the
Past
Web
 •  New
names
for
archived
resources
 •  What
was
cnn.com,
becomes
archive.org/web/20010120…
 •  …
And
lots
of
other
names
 •  With
no
way
to
discover
them
without
searching
by
hand
 •  People
do
not
like
to
search
 •  Especially
when
a
computer
could
do
it.
 •  Naviga@on
is
inconsistent
 •  Stuck
in
web
archive
content
silo
(URIs
rewriaen)
 •  Or
end
up
back
in
present
(URIs
not
rewriaen)
 Persistent Web Annotations 

Slide:
21
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 22. The
Web
without
Time
Dimension
 eg: http://www.cnn.com/ eg: http://web.archive.org/web/ 20020209001709rn_1/www.cnn.com/? Persistent Web Annotations 

Slide:
22
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 23. The
Web
with
Time
Dimension
from
Memento
 eg: http://www.cnn.com/ eg: http://web.archive.org/web/ 20020209001709rn_1/www.cnn.com/? Persistent Web Annotations 

Slide:
23
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 24. Apr 10 2001, 21:39:30 UTC current Aug 15 2004, 08:45:27 UTC Aug 15 2007, 19:21:58 UTC www.cnn.com web.archive.org Persistent Web Annotations 

Slide:
24
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 25. Original Resource ? Mementos Apr 10 2001, 21:39:30 UTC current Aug 15 2004, 08:45:27 UTC Aug 15 2007, 19:21:58 UTC www.cnn.com web.archive.org Persistent Web Annotations 

Slide:
25
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 26. Original Resource ? TimeGate Mementos Apr 10 2001, 21:39:30 UTC current Aug 15 2004, 08:45:27 UTC Aug 15 2007, 19:21:58 UTC www.cnn.com web.archive.org Persistent Web Annotations 

Slide:
26
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 27. Original Resource Link Headers ? TimeGate Conneg with TimeGate to Mementos Mementos Apr 10 2001, 21:39:30 UTC current Aug 15 2004, 08:45:27 UTC Aug 15 2007, 19:21:58 UTC www.cnn.com web.archive.org Persistent Web Annotations 

Slide:
27
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 28. Experiments 
 1.  Given
an
annota@on,
find
the
appropriate
representa@ons
 •  Create
annota@on
on
resource
known
to
change
 •  Can
we
use
the
informa@on
from
the
annota@on
to
faithfully
 recreate
the
environment
through
Memento?
 2.  Given
an
archived
resource,
find
the
appropriate
annota@ons
 •  Create
annota@ons
at
different
@mes
on
resource
known
to
 be
archived
 •  Can
we
use
the
informa@on
from
Memento
to
find
the
 appropriate
annota@ons?
 Persistent Web Annotations 

Slide:
28
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 29. Experiment
1
 Retrieve Persistent Web Annotations 

Slide:
29
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 30. Experiment
1
 Reconstruct Persistent Web Annotations 

Slide:
30
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 31. Experiment
1:
Create
Annota@on
 Persistent Web Annotations 

Slide:
31
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 32. Experiment
1:
Test
without
Memento
 Persistent Web Annotations 

Slide:
32
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 33. Experiment
1:
Test
with
Memento
 Persistent Web Annotations 

Slide:
33
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 34. Experiment
2
 •  Need to find Original URI, start, end time of representation •  Need searchable collection of annotations Persistent Web Annotations 

Slide:
34
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 35. Experiment
2:
Create
Annota@ons 
 Persistent Web Annotations 

Slide:
35
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 36. Experiment
2:
Create
Annota@ons 
 Persistent Web Annotations 

Slide:
36
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 37. Experiment
2:
Create
Annota@ons 
 Persistent Web Annotations 

Slide:
37
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 38. Experiment
2:
Test
without
Memento
 Persistent Web Annotations 

Slide:
38
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 39. Experiment
2:
Test
with
Memento
 Persistent Web Annotations 

Slide:
39
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 40. Conclusions 
 •  Annota@on,
as
a
core
scholarly
prac@ce,
is
increasingly
web‐based
 •  We
propose
using
OAC
and
Memento
to
provide
a
solu@on
for
 persistence
of
annota@ons,
by
displaying
annota@ons
in
their
 original
context
and
displaying
relevant
annota@ons
for
archived
 resources
 •  Archiving
of
annotated
and
annota@ng
resources
important
 •  Interes@ng
research
ques@on
of
whether
annota@on
spans
 mul@ple
archived
resources
 Persistent Web Annotations 

Slide:
40
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 41. Thank
You


 •  Authors:
 •  azaroth42@gmail.com
/


rsanderson@lanl.gov
 •  hvdsomp@gmail.com


/


herbertv@lanl.gov
 •  OAC:


 •  hap://www.openannota@on.org/
 •  hap://groups.google.com/group/oac‐discuss
 •  Memento:

 •  hap://www.mementoweb.org/
 •  hap://groups.google.com/group/memento‐dev
 •  Thanks
To:
 •  Scoa
Ainsworth,
Luda
Balakireva,
Tim
Cole,
Anna
Gerber,
Bernhard
 Haslhofer,
Eric
Hetzner,
Jane
Hunter,
Cliff
Lynch,
Michael
Nelson,
Doug
 Reside,
Harihar
Shankar
 Persistent Web Annotations 

Slide:
41
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia
  • 42. Memento
HTTP
Flow
 HEAD R, (Accept-Datetime) LinkG GET G, Accept-Datetime 302M, Vary, TCN, LinkR,B,M GET M, (Accept-Datetime) 200, Content-Datetime, LinkR,B,M Persistent Web Annotations 

Slide:
42
 Rob Sanderson, Herbert Van de Sompel JCDL 2010, June 21-25, Surfers Paradise, Australia