Re: Annotations at Europeana

Hi Hugo,

Overall it looks great :) Very happy to see Europeana enabling annotation!

For example 2b, did you mean to give it the motivation oa:commenting or
oa:tagging?
If it's a tag, then the body resource should also have @type: oa:Tag (and
the motivation would be oa:tagging)
See: http://www.w3.org/TR/annotation-model/#tags

For the linking use case, the semantic tag pattern is very interesting and
pretty easy to understand what's being asserted. However if the
relationship is only correct in one direction, then this wouldn't work as
the targets are not ordered.

The easiest way is to have the subject as the body, and the object as the
target.  Then oa:linking is blandly saying that they're related somehow.
This is your 1b.

Option 2 is currently not explicitly supported, but has been discussed on
the conference calls and your pattern is exactly what we came up with to
support the use case.  My concern with the pattern is the redundancy
between body graph and annotation graph -- the both essentially say the
same thing, and could thus be simpler by just asserting the relationship as
a single triple. You lose the provenance of course.

So unless there's additional requirements, to me option 1b is the easiest.

Hope that helps!

Rob





On Mon, Apr 20, 2015 at 5:54 AM, Hugo Manguinhas <
Hugo.Manguinhas@europeana.eu> wrote:

> Dear all,
>
> I am Hugo Manguinhas from Europeana.eu, Europe’s cultural heritage
> portal.. In the scope of our Ev3 project, we are developing a pilot with
> HistoryPin (www.historypin.org) to have roundtripping of annotations
> between the HistoryPin’s platform and Europeana, which will become
> available in our portal. As it will be our first real support for
> annotations, we decided to start small and therefore we will focus on only
> two simple scenarios: tagging of objects with text, and linking between
> objects. For this we created a google doc [1] expressing how these two
> scenarios can be modelled using the new WebAnnotation data model. A more
> ambitious work on annotation will come in the scope of other projects like
> the eSounds project as you can see on this requirements doc [2].
>
> We would appreciate your feedback on this work, in specific to the
> document on WA modelling [1].
>
> [1]
> https://docs.google.com/document/d/1Yw1uJdf76v3StXST8x16TReB8FmOLw5LuWOzZz4lSiM
> [2]
> https://docs.google.com/document/d/1bGcH8gMjdyzw4tZlwH5mc2OBvK3lQE-F0mSuCzqgPqA
>
> Thanks in advance!
>
> Best,
> Hugo
>
>


-- 
Rob Sanderson
Information Standards Advocate
Digital Library Systems and Services
Stanford, CA 94305