This document summarizes the Open Annotation model presented by Robert Sanderson and Herbert Van de Sompel. The model includes a basic annotation with a body and target, specific resources like state and style, and a publish/subscribe network model. Annotations can be further typed and associated with provenance. Bodies and targets can have specific representations identified. The document outlines specifiers like state, selector and style to describe segments of interest and rendering.

1. Open Annotation
(W3C Community Group Draft)
Robert Sanderson
azaroth42@gmail.com
Los Alamos National Laboratory
@azaroth42
W3C Open Annotation Co-Chair
Herbert Van de Sompel
hvdsomp@gmail.com
Los Alamos National Laboratory
@hvdsomp
http://www.openannotation.org/
This research was funded, in part, by the Andrew W. Mellon Foundation.
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2. Overview
• Basic Open Annotation Model
• Annotation
• Body
• Target
• Specific Resources
• State
• Selector
• Style
• Multiple Specifiers
• Network Model
• Publish/Discover/Subscribe
• Embedding Resources
• Publishing Resources
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3. Basic Model
An RDF
Document
The What The
Comment Comment is
About
http://www.openannotation.org/spec/core/
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4. Basic Model
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5. Annotation Types
There can be further typing of the Annotation to clarify purpose.
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6. OAX Annotation Types
Class Description
Bookmark Marker at (a point in) a resource
Change Request for modification
Classification Assignment of a class
Comment Commentary or Review
Description Description of, rather than about target
Highlight Highlighted (section of a) resource
Link Relationship of unspecified semantics
Moderation Assignment of value or quality
Question Question about target
Reference Citation or reference pointer for target
Reply Response to previous statement
Tag A tag on target resource, often textual
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7. Annotation Types
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8. Annotation Provenance
Additional information can be associated with the Annotation
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9. Annotation Provenance
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10. Body
Body can have both Type (Video) and Format (mpeg)
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11. Body
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12. Target
The Target can also have both Type (Image) and Format (jpeg)
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13. Target
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14. No Body
Highlight or Bookmark Annotations may not have a Body
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15. No Body
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16. Multiple Targets
There can be more than one Target, eg. for compare/contrast.
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17. Multiple Targets
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18. Specific Body
Identifier for a
Specific
Representation
or Part of a
Resource
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19. Specific Body
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20. Specific Target
Identifier for a
Specific
Representation
or Part of a
Resource
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21. Specific Target
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22. Specifiers
Specific Body and Specific Target resources identify the region of
interest, and/or the state of the resource.
Need to be able to describe the state of the resource, the segment
of interest, and potentially styling hints for how to render it.
We introduce three Specifiers:
State Describes how to retrieve representation
Selector Describes how to select segment
Style Describes how to render/process segment
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23. Specifier Workflow
Multiple Specifiers of different types can be used together
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24. State
Description of
Representation
of Interest of
Body or Target
Resource
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25. State
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26. Selector
Description of
Segment of
Interest of
Representation of
Body or Target
Resource
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27. Offset Text Selector
Description of
Text Segment of
Interest via
Offset and Range
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28. Offset Text Selector
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29. Quotation Text Selector
Description of
Text Segment of
Interest via
Quotation
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30. Quotation Text Selector
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31. Fragment Selector
Description of
Segment of
Interest via URI
Fragment
Specification
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32. Fragment Selector
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33. Style
Description of
Rendering
Instructions for
Body or Target
Representation
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34. Style
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35. Alternative Specifiers
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36. Alternative Specifiers
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37. Composite Specifiers
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38. Composite Specifiers
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39. Annotation Protocols
Unlike previous systems, Open
Annotation does not mandate a
protocol.
No reliance on a client/server
combination gives the client
autonomy.
Instead we promote a publish/
subscribe methodology, where
annotations may be stored and
consumed from anywhere.
Protocol: publish, subscribe, consume tied together
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40. Publish/Subscribe Method
We don’t specify how this transfer should occur
publish
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41. Publish/Subscribe Method
Nor this.
publish subscribe
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42. Publish/Subscribe Method
Nor this.
publish subscribe consume
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43. Inline Body (and other Resources)
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44. Inline Body (and other Resources)
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45. Model Overview
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46. Thank You
Robert Sanderson
rsanderson@lanl.gov
azaroth42@gmail.com
@azaroth42
Web: http://www.openannotation.org/
http://www.w3.org/community/openannotation/
Slides: http://slidesha.re/qolpwI
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