The Web, HPC and UNICORE

R. Menday, B. Hagemeier, A. Streit

Jülich Supercomputing Centre, Research Centre Jülich, Jülich, Germany

Work carried out within the A-WARE project

An Easy Way to Access Grid Resources

http://www.a-ware.org

Web 2.0

• content in form that encourages maximum re-use
• basis for mash-ups
• Web of Text -> Web of Data
• AJAX, Javascript, JSON, Atom, etc

Web 3.0 ?

hypertext :: text -----links-----> text

hyperdata :: data -----links-----> data

• Resource focused - HTTP URIs naming each one
• URI's - uniform naming scheme
• RESTful HTTP - uniform interface
• RDF - uniform model foundation
• unified way of describing simple attributes of a resource
• then 'typing' the links between resources
• see LinkingOpenData

The Grid as part of the (Semantic) Web

Clients (lots of them - both browser and non-browser based) are mashups

• no need for explicit publishing onto the Web
• familar, friendly
• good at binary content
• good for sharing

UNICORE/w3 offers ...

• linking and bookmarking
• search, not sort
• visual aids (maps, timelines ...)
• feeds
• sharing, tagging, starring, annotating
• virtual views
• metadata
• publishing system

Modeling the Resources of the Grid

• RESTful
• easy to identify the resources of the Grid
  http://localhost:8182/roger/usite/U1
• make links between them
• representations as RDF (also as JSON, ATOM)
• query with SPARQL

Searching ...

describe and link everything with RDF, and then search over it
http://localhost:8183/roger/feeds/sites

Metadata

user defined. folksonomy type of tagging.

also application/filetype specific metadata extraction with subsequent dynamic publishing to the (Semantic) Web

Collabatory eScience

choose to share jobs, files, directories.

either with a restricted group, or with the world

Summary

UNICORE/w3 is

• The Grid embedded into the Web
• Projection of the Resources of the Grid onto the read/write, Semantic Web
• Empowering the user to make the best use of the Grid and the information contained in it