Pandora Framework Architecture

This repository contains documentation relating to the components of the Linked Open Data Image Presentation and Annotation Framework.

See v.0.2.0 diagram

Currently, these components are documented in the following repositories or locations:

Repository Layer

• Fedora 4
• Apache Karaf
• Apache Camel
• Fedora Messaging
• Apache Jena

Service Layer

• iipsrv
• openJPEG
• Solr
• Virtuoso
• eXist-db
• wikibase

Middleware

• Pandora Manifest Service
• Pandora Modeller
• Redis
• Riak KV

Web App Layer

• IIIF Viewer
• Metadata Subscriber
• Blumenbach TEI Datenbank
• XForms for TEI
• Mediafiles Viewer
• Sammlung Karte
• Composite UI

Data Model

• The Data Model for all objects is based on the IIIF Presentation API.
• See Diagram for the class relationships
• See HOWTO for implementation specifics.
• See tei-to-rdf on prototype method for #LD transformation of TEI.

Event Model

The Event Model of the Web App layer provides realtime dynamic topology via:

• socket.io
• redis pubsub messaging.

Session Model

Assuming a load balanced reverse proxy to the worker instances, "sticky sessions" will be used.
Redis (or Riak KV) will provide persistent session storage.

Key Web App Node.js Libraries

• socket.io
• socket.io-redis
• redis
• socket.io-express-session
• openseadragon
• node-rest-client