Graphity - Generic Linked Data Platform

GraphityGeneric Linked Data platform

Do more with less!

Wulffmorgenthaler

Danish comic strip since 2001

HeltNormalt

Rebranding in 2011

Old codebase

ZendFramework

ModelPHP

templatesMySQLPropelORM

Controller

View

SQL arrays

Request Response

Objects

Model-View-Controller

Webframework

Model TemplatesRDBMSORM/DAO

Controller

View

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 codeBugs

Model mismatch

DataConversions(N) = 2 × (N − 1)

RDF

XML

JSON

Relationalmodel

Custom codeBugs

ObjectModel

Linked Data(sources)

DataConversions(N) = 0

REST+RDF

JAX-RS Jena

ResourcegetURI()

Request/Response Model

@Path Property

UriBuilder Literal

RDFResource

getURI()

getModel()

exists()

describe()

authenticate()

authorize()

Linked Systems

PlatformGraphity

ModelRDF store

ControllerResources

ViewXSLT

RDF/POST

DOMSPARQLUpdate

Request Response

RDF

Unified model

DataConversions(N) = 2

RDF

XMLRDF/XML

JSONJSON-LD

Relationalmodel

DOM D2RQ

Objectmodel

RDF API

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 protected]

[email protected]

@pumba_lt

@seporaitis