Graphity - Generic Linked Data Platform

Graphity Generic Linked Data platform Do more with less!

Wulffmorgenthaler Danish comic strip since 2001

HeltNormalt Rebranding in 2011

Old codebase SQL arrays Request Response Objects

Model-View-Controller SQL Request Response Objects

Leaky abstractions

Incompatible APIs DataConversions(N) ≥ 2 × (N − 1) Number of data (model) conversions between source datastore and target datastore Custom code Bugs

Model mismatch DataConversions(N) = 2 × (N − 1) Custom code Bugs

Linked Data(sources) DataConversions(N) = 0

REST+RDF JAX-RS Jena Resource getURI() Request/Response Model @Path Property UriBuilder Literal

RDFResource
getURI()
getModel()
exists()
describe()
authenticate()
authorize()

Linked Systems Request Response RDF

Unified model DataConversions(N) = 2

Generic design
Reuse reuse reuse!
APIs: JAX-RS, Jena, XSLT
Ontologies: ACL, DC, SIOC, FOAF, Zodiac, LD API
Push abstractions & logic to RDF
Generalize cases
Refactor to minimize
Inversion of control
Overload default behaviour

Codebase comparison Component Language # of files # of lines Language # of files # of lines HeltNormalt Old codebase Model SPARQL 89 5590 PHP 93 19325 Model (strips) 7 588 View XSLT 60 9293 PHP 67 2528 View (strips) 5 784 Controller PHP 65 4155 PHP 51 7625 Controller (strips) 1 32 Graphity Zend Framework Platform PHP 88 6043 PHP 284 50755

Server load

Potential RDF sources
HTTP traffic
Filesystems
Program code
repositories
source

Generic Linked Data tools & UI
Browser/editor
Analytics
Maps
Timelines/calendars
Real-time streams
Social widgets

W3C involvment
Best practices
Standard RDF/JSON syntax
Standard RDFizer interface
GRDDL stylesheet repository
Community involvment
w3c.github.com

Get in touch!
Contribute
graphity.org
github.com/Graphity - open-source!
Contact us
[email_address]
[email_address]
@pumba_lt
@seporaitis

Graphity - Generic Linked Data Platform

by Julius Šėporaitis

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