Annotea, A Standard for e-Comments Simonet Alexandre Exchange Student Media Engineering Annotations Definition Metadata Annotea Infrastructure ; RDF, Xpointer, Xlink Annotea annotation model Amaya Description Practice Discussion & conclusion 1 AnnotationConclusionAmayaContentsAnnotea

2 AnnotationConclusionAmayaContentsAnnotea A nnotations are comments, notes, explanations, or other types of external remarks that can be attached to a Web document or a selected part of the document. A nnotations give additional information about an existing piece of data = metadata. A n annotation has many properties including : Physical location : is the annotation stored in a local file system or in an annotation server. Scope : is the annotation associated to a whole document or just to a fragment of this document. Annotation type : the kind of annotation you can expect ; for example, Comment or Query.

3 AnnotationConclusionAmayaContentsAnnotea M etadata, or literally "data about data," F or improving the quality of web search. T he folks at the W3C, the closest thing the web has to a standards committee, have released Annotea, an open source "annotation" capability that lets anyone create metadata about web pages that is stored on separate "annotation servers."

4 AnnotationConclusionAmayaContentsAnnotea A nnotea, a new technology that lets you annotate existing Web documents with commentary of your own. I t is part of the W3C's Semantic Web project. A nnotea sees annotations as metadata about a whole document or a part of a document. A nnotea is basically an annotation server : it uses an RDF database and a simple HTTP front end to store annotations, and respond to annotation queries. XPointer is used for locating the annotations in the annotated document.

5 AnnotationConclusionAmayaContentsAnnotea X LL, the extensible linking language, is a new means of linking between documents. X LL is devided into two parts : Xlink and Xpointer. X pointer is used for locating the annotations in the annotated document. X link, the xml linking language, defines how one document links to another document. X pointer, the xml pointer language, defines how individual parts of a document are addressed. X pointer refers to particular parts of a locations in XML document. A means of Addressing specific locations and ranges in XML documents; used inside Xlink.

6 AnnotationConclusionAmayaContentsAnnotea R esource Description Framework (RDF), as its name implies, is a framework for describing and interchanging metadata. M ain Principles of RDF : foundation for metadata processing. used to describe internet resources and how they relate to each other. provides interoperability between applications that exchange information on the Web. uses XML to exchange descriptions of Web resources flexible enough that the application that it describes can be either XML and non-XML resources.

7 AnnotationConclusionAmayaContentsAnnotea T he basic architecture of Annotea

8 AnnotationConclusionAmayaContentsAnnotea T he Annotea annotation model : The annotates property refers to the annotated document. The context property refers to the actual place of the annotation within the document. The body property contains the content of the annotation. The dc:title property is a descriptive annotation title.

9 AnnotationConclusionAmayaContentsAnnotea T here are the clients for annotea : Amaya. Provides a native support for Annotea, for both publishing, querying, and discussion threads. Annozilla Uses Annotea within Mozilla. Snufkin Uses Annotea with IE. A nnotation isn't new, and there have been several attempts to add it to the Web so far. A nnotea takes a slightly different approach, being non-proprietary and based on open web standards.

10 AnnotationConclusionAmayaContentsAnnotea T he first client implementation of Annotea is W3C's Amaya editor/browser. C urrently Amaya presents annotations with pencil annotation icons ( ) A nnotations can be stored locally or in one or more annotation servers. When a document is browsed, Amaya queries each of these servers, requesting the annotations related to that document.

11 AnnotationConclusionAmayaContentsAnnotea P ractice with Amaya : C reating an Annotation A nnotation Metadata S aving an Annotation A bout Local Annotations C onfiguring Annotation Settings N avigating Annotations A nnotations in the Link window T he Annotation Local Filter Menu

12 AnnotationConclusionAmayaContentsAnnotea A dvantages : Creating annotations for a Web document does not modify the source document itself. That is, the source document is not changed in any way. The basic concepts of learning in the future. Share the annotations on the web. D isadvantages : That it is currently not very practical to use annotations directly in a lecture; It is too time consuming ! Today, not everybody has a compatible browser.

13 AnnotationConclusionAmayaContentsAnnotea H ave you got some questions ? S ources : XML, Extensible Markup Language from Elliotte Rusty Harold, Annotations in Amaya, help from Amaya Browser, T hanks !