## 2 Case Studies
### Migrating Annotations across Multiple Representations of Museum Artefacts
Figure 6: Instance of OA model for 3 DSA. The 3 DSA client also captures the co-ordinates, rotation, light position and other related data, which is used to recreate the precise view, zoom level, and position at which the annotation was originally attached. There is no standard for addressing segments within 3D models, and as there may be many different values stored to represent each segment including co-ordinates, transformation matrixes etc, these 3D _Selectors_ are not well suited to being encoded in a URI fragment, in the style of the W3C Media Fragments [18] or XPointers. Consequently, we have had to define custom subclasses of _Selector_ to describe points, surface regions and segments of a 3D or 2.5 VR model. In the example shown in Figure 3, the two 3D format targets share the same X3D-format Selector (_3 dSel_) for a given surface region, however the 2.5 VR format requires a different selector (_qtrvSel_) because the data has been transformed to apply to the 2D plane. In addition to having to support selectors that precisely specify points, 2D surface regions or 3D volumetric segments on 3D digital models, there is also a need to attach structured annotations that comprise both ontology-based (semantic) keywords (e.g., \"attic, lekythos\") as well as full-text descriptions \"The woman holds a lidded bowl over a large kalathos\". The semantic tags would be attached using the \"oax:hasSemanticTag\" property and the textual description would be represented as an Inline Body (since it does not have a URI). The text box below illustrates how the OA model would represent such an annotation (using the Turtle RDF format). ``` @prefix oa: <[[http://www.openannotation.org/ns/](http://www.openannotation.org/ns/)]([http://www.openannotation.org/ns/](http://www.openannotation.org/ns/))> @prefix oax: <[[http://www.openannotation.org/ns/](http://www.openannotation.org/ns/)]([http://www.openannotation.org/ns/](http://www.openannotation.org/ns/))> @prefix cnt: <[[http://www.w3.org/2011/content#](http://www.w3.org/2011/content#)]([http://www.w3.org/2011/content#](http://www.w3.org/2011/content#))> @prefix ex: <[[http://www.example.org/#](http://www.example.org/#)]([http://www.example.org/#](http://www.example.org/#))> ex:Anno1 a oa:Annotation; oa:hasBody ex:Body1; oa:hasTarget ex:ST1; oa:hasTarget ex:ST2; oa:hasTarget ex:ST3. ex:ST1 a oa:SpecificResource; oa:hasSelector ex:3 dSel; oa:hasSource <[[http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa/vasel_highres.x3d]([http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa/vasel_highres.x3d)>. ex:ST2 a oa:SpecificResource; oa:hasSelector ex:3 dSel; oa:hasSource <[[http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa/vasel_lowres.x3d]([http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa/vasel_lowres.x3d)>. ex:ST3 a oa:SpecificResource; oa:hasSelector ex:vFsel; oa:hasSource <[[http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa/vasel.qtr]([http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa/vasel.qtr)>. ex:Anno1 oax:hasSemanticTag <[[http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa_ontology#lekythos]([http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa_ontology#lekythos)>. ex:Anno1 oax:hasSemanticTag <[[http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa_ontology#attic]([http://itee.uq.edu.au/eresearch/3](http://itee.uq.edu.au/eresearch/3) dsa_ontology#attic)>. ex:Body1 a cnt:ContentAsText; cnt:characterEncoding \"UTF-8\"; cnt:chars \"The woman holds a lidded bowl over a large kalathos\">. ### Automatic Semantic Tagging of Species Accelerometry Data and Video Streams

Within the OzTrack project [19] at the University of Queensland, we are working with ecologists from the UQ ECO-Lab, providing tools to enable them to analyse large volumes of 3D accelerometry data acquired by attaching tri-axial accelerometers to animals (e.g., crocodiles, cassowaries, wild dogs), to study their behavior.