Frameworks

Various frameworks that we might decide to use

SPIN, SPARQLmotion, SWP

• SPIN (SPARQL Inferencing Notation] uses SPARQL to define functions, rules, constraints and inferred properties over RDF classes, and goes way beyond OWL2 expressive power
  • eg constraint: Square is a subClass of Rectangle for which hasWidth=hasHeight
  • eg computed property of Rectangle: hasArea := hasWidth * hasHeight
• UISPIN (aka SWP, SPARQL Web Pages) is a UI framework using semweb UI descriptions and SPIN to access data through SPARQL queries
• SPARQLmotion is a framework for defining ETL processing using SPARQL
• SPINMap is a SPARQL Ontology Mapping framework with a Graphical Notation

These are developed by TopQuadrant and proposed for standardization to W3C. Source status is unknown

SWI Prolog

(In case you thought Prolog is dead . But I'm very far from suggesting that we use this)
SWI Prolog and the ClioPatria semantic application server is used in many of the Semantic Web projects of VU Amsterdam.

• Eg Amalgame vocabulary mapping, Semantic search in Europeana ThoughtLab, Europeana LOD pilot for the Amsterdam Museum, current development of Europeana Data Model (EDM)
• Interesting articles on how to extend Prolog to be usable for large-scale web and semweb applications:
• In particular see Jan Wielinga's PhD thesis that includes most of the articles

TODO: make matrix showing which tool covers which component

Multi-tenancy

Multitenancy refers to a principle in software architecture where a single instance of the software runs on a server, serving multiple client organizations (tenants). Multitenancy is contrasted with a multi-instance architecture where separate software instances (or hardware systems) are set up for different client organizations. With a multitenant architecture, a software application is designed to virtually partition its data and configuration, and each client organization works with a customized virtual application instance.

A writeup from CollectionSpace on Nuxeo multitenancy issues outlines some of the issues that need to be addressed:

ResearchSpace is a multi-tenant application, since:

• different institutions have their own content spaces and RDF graphs
• they share a common space and graph
• each can have its own terminology mapping and other

Luckily, the different tenants cannot customize aspects of ResearchSpace to a significant degree.