Hands-on with Fedora 4Content modeling, search, and discovery

David Wilcox, DuraSpace@d_wilcox

http://goo.gl/drcd0r

Understand the basics of linked data

Learn how to create and and manage content using Fedora 4

Understand how content is indexed for search and discovery

Learning Outcomes

Linked Data Rules

1. Use URIs as names

2. Use HTTP URIs so that people can look up names

3. When someone looks up a URI, provide useful information, using

the standards (RDF*, SPARQL)

4. Include links to other URIs, so that they can discover more things.

Making Assertions with Triples

Subject(Noun)

Object(Noun)

Predicate

(Verb)

An Example

is a part of is a part of

Establishing identity with URIshttps://en.wikipedia.org/wiki/Hanover

http://dbpedia.org/page/Germany

http://en.wikipedia.org/wiki/Europe

http://dbpedia.org/page/Hanover

https://en.wikipedia.org/wiki/Germany

http://dbpedia.org/resource/Europe

Vocabularies

Controlled list of authorities, each with a URI

Well-known vocabularies:

● DBpedia● Library of Congress Subject Headings, Names● Virtual International Authority File● Getty vocabularies (AAT, ULAN, TGN)● GeoNames

Ontologies

Ontologies are formal specifications of shared conceptualizations

Well-known RDF ontologies:

● Dublin Core, FOAF, schema.org, SKOS

Less well-known RDF ontologies:

● BIBFRAME, MODS/MADS, Fedora

Descriptive Metadata

● Lots of different standards/communities

● Aim to share code, or at least data

● Use common ontologies and vocabularies

● Domain-specific and local supplements

Content Modeling

Modeling Examples

Books with multiple editions

Books with internal structure

Books with annotations at the page, book, character, or pixel level

Image collections

Images with annotations at the pixel level

Serials

Audio or video with transcriptions or other annotations on time slices

Toolkits - Modeling & InteroperabilityPCDM - https://github.com/duraspace/pcdm/wiki

Rights Metadata recommendations - https://wiki.duraspace.org/display/hydra/Rights+Metadata+Recommendation

Technical Metadata recommendations - https://wiki.duraspace.org/display/hydra/Technical+Metadata+Application+Profile

File use recommendations - https://wiki.duraspace.org/display/hydra/File+Use+Vocabulary

Web Annotations - https://www.w3.org/annotation/

IIIF - http://iiif.io/

LDP Tutorial - https://github.com/projecthydra/hydra/wiki/LDP-Containers-for-the-perplexed

LDP Spec - https://www.w3.org/TR/ldp/

Portland Common Data Model

pcdm:Collection

pcdm:Object pcdm:File

pcdm:hasMember (m:m)pcdm:hasRelatedObject (m:m)

pcdm:hasMember (m:m)pcdm:hasRelatedObject (m:m)

pcdm:hasMember (m:m)

pcdm:hasFile (0:m)

DA

DA A TB

Bitstream

D

A

T

B

Access

Descriptive

Technical

http://demo.fcrepo.org:8080/fcrepo/

Create, Read, Update, Delete

INSERT {<> dc:title "The Story of My Life" .}WHERE { }

INSERT {<> dc:creator "David Wilcox" .}WHERE { }

INSERT {<> dc:subject <http://id.loc.gov/authorities/subjects/sh85133147> .}WHERE { }

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX pcdm: <http://pcdm.org/models#>

INSERT {

<> rdf:type pcdm:Object .

<> pcdm:hasMember </fcrepo/rest/david-wilcox/book-collection/book1/page1>.

} WHERE { }

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX pcdm: <http://pcdm.org/models#>

INSERT {

<> a pcdm:Object .

<> pcdm:hasMember </fcrepo/rest/david-wilcox/book-collection/book1/page1>.

} WHERE { }

The same thing, but shorter:

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX pcdm: <http://pcdm.org/models#>

INSERT {

<> a pcdm:Object ;

pcdm:hasMember </fcrepo/rest/david-wilcox/book-collection/book1/page1>.

} WHERE { }

The same thing, but shorter:

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX pcdm: <http://pcdm.org/models#>

INSERT {

<> a pcdm:Object ;

pcdm:hasFile </fcrepo/rest/david-wilcox/book-collection/book1/page1/page1.tiff>.

} WHERE { }

Versioning

DELETE {<> dc:creator "David Wilcox" .}WHERE { }

Transactions

Search and Discovery

Additional Resources

Linked Data Platform specification

http://www.w3.org/TR/ldp/

LDP Containers for the Perplexed

https://github.com/projecthydra/hydra/wiki/LDP-Containers-for-the-perplexed