Agenda

Review SoaF Use Cases
OA Selector formats (see below)
Older OA notes - http://www.w3.org/community/openannotation/wiki/Cookbook
Next steps

OA Fragment Selector by format

XHTML - http://tools.ietf.org/rfc/rfc3236 - namedSection
PDF - http://tools.ietf.org/rfc/rfc3778 - page=10&viewrect=50,50,640,480
Plain text - http://tools.ietf.org/rfc/rfc5147 - char=0,10
XML - http://tools.ietf.org/rfc/rfc3023 - xpointer(/a/b/c)
RDF/XML - http://tools.ietf.org/rfc/rfc3870 - namedResource
CSV - http://tools.ietf.org/rfc/rfc7111 - row=5-7
Time-based media [spatial or temporal] - http://www.w3.org/TR/media-frags/ - xywh=50,50,640,480 or t=30,60
SVG - http://www.w3.org/TR/SVG/ - svgView(viewBox(50,50,640,480))
EPUB - http://www.idpf.org/epub/linking/cfi/epub-cfi.html - epubcfi(/6/4[chap01ref]!/4[body01]/10[para05]/3:10)
IIIF - http://iiif.io/api/annex/openannotation/index.html - xywh=100,150,500,30 or pct:0,0,10,10

No specifications for the following selectors, but they are also included in OA and offer a way to refer to segments of a disk image by byte range:

Text quote selector - annotation is the body and the target is fragment where the annotation goes

{
 "@id": "http://example.org/anno16",
 "@type": "Annotation",
 "body": {"@id": "http://example.org/comment1"},
 "target": {
    "source": "http://example.org/page1",
    "selector": {
       "@type": "TextQuoteSelector",
       "exact": "anotation",
       "prefix": "this is an ",
       "suffix": " that has some"
    }
 }
}

Text position selector

{
 "@id": "http://example.org/anno17",
 "@type": "Annotation",
 "body": {"@id": "http://example.org/review1"},
 "target": {
    "source": "http://example.org/ebook1",
    "selector": {
       "@type": "TextPositionSelector",
       "start": 412,
       "end": 795
    }
 }
}

Data position selector

{
 "@id": "http://example.org/anno18",
 "@type": "Annotation",
 "body": {"@id": "http://example.org/note1"},
 "target": {
    "source": "http://example.org/diskimg1",
    "selector": {
       "@type": "oa:DataPositionSelector",
       "start": 4096,
       "end": 4104
    }
 }
}

Notes

Discussion of Use Cases:
- Different file formats
- Time-based media - segment of a video file W3C media specification
  - Segments created that way
  - User annotations - managed differently
- XML encoded text example
  - general case - being able to select a region of a text for search and display
  - retrieve a chapter for example
  - restricting search
  - Specific case - XML describes something represented elsewhere in the repository
    - a reference to a digital page in the xml document
    - would work with both OCR file and the tiffs that make it up
    - how to represent in PCDM? how to relate the two schemes XML and PCDM?
  - how to link between all representations - indexed OCR, page TIFFS, and XML
- Will attended OA conferences 4-5 years ago
  - how can you identify and annotate not just an entire image but a segment within an image
  - extended that to talk about being able to do that in a video as well, spatial and temporal
- Similar to XML encoding linked up to image is the case of a page with image on it and image is what needs to be referenced
  - important for newspapers, can have 3-4 articles, multiple images that are connected to some articles and not others
- Irregular shapes when you get into maps, manuscripts that are fragmented
OA Selector
- Three pieces
- Byte range for disc image
- Fragment selector by format
- File types by fragments (see IIIF)
- Calling up a fragment by extending the url
- Line up an XML document as a transcript for a page image.
How are the text selector, text position selector, text quote selector, data position selector relate to the fragment selector.
Are these other things considered but not adopted? There seems to be an overlap between capabilities? Why a text position selector when you have a text fragment selector?
What is relation of selectors in section 4.2 and those selectors discussed (text selector, text position selector, text quote selector, data position selector)
- OA wiki cookbook page shows some scenarios modeled same way as text position selector and text quote selector (http://www.w3.org/community/openannotation/wiki/TextCommentOnWebPage) so maybe those are selectors for which OA didn't think there was a standard available
Do we have a clear idea of the OA selector? open-ended
Do we need to specify the exact selectors we will cover, not just say we will do the W3C OA selector specification?
Good starting point; but need to so some more research into annotation fragment selectors.
Image, pdf, disc image use case spelled out.

Action Items:

Julie: check with Rob Sanderson or John Stroop on where IIIF and other fragment specs are listed besides OA/also image use case
Julie: Expand on time-based media use case to include spatial.
Jeremy: pdf use case
Julie: draft wiki page for segment of a file recommendation - pretty sure we can point to OA
- OA is open-ended, though, so we need to list out standards we considered.
- Point to use cases.

Next meeting 16 November at 4 PM Eastern.

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