Fedora Technisch

Henk van den BergSoftware developer @ DANS

19-6-2008 Fedora Op Klompen

Fedora Technisch



Programma• Systeem-architectuur

– De architectuur achter het systeem– Installatie– Api’s, SOAP & rest

• Digitale Objecten– Content Model Architecture– FOXML, MetslikeFOXML– Versioning

• AuthN & AuthZ– LDAP/tomcat users– XACML

• Zoeken– gSearch– Semantisch zoeken



Programma



MDMD

contentcontent

MDMD MDMD

“Repository Pattern”

Architectuur



Aan de slag



Installatie

$ java -jar fedora-3.0b1-installer.jar

*********************** Fedora Installation ***********************

Installation type? Options : quick, custom, client

Fedora home directory?

Fedora administrator password?



Start Fedora#!/bin/shecho -----------------------------echo start script for Fedora 3.0b1echo -----------------------------

export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Homeexport FEDORA_HOME=/Fedoraexport PATH=$PATH:$FEDORA_HOME/server/bin:$JAVA_HOME/bin

echo "Using JAVA_HOME: $JAVA_HOME"echo "Using FEDORA_HOME: $FEDORA_HOME"echo "Using PATH: $PATH"echoecho "Executing $FEDORA_HOME/tomcat/bin/startup.sh"echo -----------------------------echo echo -----------------------------

$FEDORA_HOME/tomcat/bin/startup.sh



API’s SOAP & REST

API-A (Access)

SOAP

REST

SOAP

REST

API-M (Management)

Fedora Rest API (Experimental)A + M

Client.jar (Java API) A + M



Digital Object



Digital Object

FOXML 1.1FOXML 1.0METS 1.1ATOM 1.0

Ondersteunde formaten

Foxml

foxml reference example.xml

<digitalObject PID="uniqueID"><objectProperties>

<property/><property/>...

</objectProperties><datastream>

<datastreamVersion/><datastreamVersion/>...

</datastream></digitalObject>



Hello Fedora

public java.lang.String ingestAndCommit(java.io.InputStream in, java.lang.String ingestFormat, java.lang.String logMessage) throws java.rmi.RemoteException, java.io.IOException

fedora.client.utility.ingest.AutoIngestor

public java.lang.String uploadFile(java.io.File file) throws java.io.IOException

fedora.client.FedoraClient

1. Upload content

2. Ingest Digital Object

uploaded://123 FOXML<datastream>….

eof:456



DataStream: Control Group

Externally Referenced Content (E), Redirected Content (R),Managed Content (M) or

Inline XML (X)



DataStream: Reserved ID’s

Dublin Core

Object to object relationships in RDF

Datastream to datastream relationships in RDF(experimental)



Object to object relations



RDFResource Description Framework (RDF)

Tripples

W3C-standaard

Fedora Ontology



(nogmaals) Digital Object

Content Model Architecture (CMA)



Content Models

digital content entity

model of a service

how to get the service

formal model



(nogmaals) Digital ObjectData object



(nogmaals) Digital ObjectService Definition object



(nogmaals) Digital ObjectService Deployment object



(nogmaals) Digital ObjectContent Model object



Versie beheer

• Aan-/uitzetten per repository• Aan-/uitzetten per datastream• Audit trail per wijziging



(nogmaals) Digital Object



Security

• LDAP / tomcat users• XACML



Zoeken

• gSearch• Semantic search



En verder…

• eSciDoc http://www.escidoc-project.de• MuraDora• Topaz http://www.topazproject.org/trac/



(Voor- en) nadelen

• XACML:• - opgeslagen in files• - queries traag• - geen hierarchie ondersteuning• Transacties:• - geen locking• - geen ACID• - geen transacties

• Nog meer?

Fedora Technisch

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