Developing Flexible Interfaces in Support of a Heterogeneous Digital Repository. John B Howard (UCD) HEAnet National Conference 2014

Transcription

1 Developing Flexible Interfaces in Support of a Heterogeneous Digital Repository John B Howard (UCD) HEAnet National Conference 2014

2 The Mission of the UCD Digital Library is to capture representations of cultural heritage resources and research outputs of University College Dublin as well as its collaborators and partners, to preserve, sustain and enhance the usability of these assets, and to enable their broad dissemination.

3 Background: IVRLA HEA PRTLI Cycle 3: Irish Virtual Research Library and Archives (IVRLA) Jan 2005-Dec 2009 Objectives: resource digitisation; new research using digital source materials; new ethnographic research; proof of concept in design of a Trusted Digital Repository Outcomes: 35 curated collections (drawn from original UCD-held material in the James Joyce Library and the participating repositories) 16 research collections (drawn from demonstrator research projects) Digital repository services (fedora 2.X, Apache Wicket, etc.)

4 Background: UCD Digital Library Rebranding signifies end of project, start of a new phase of service addressing: Organisational sustainability UCD Library Research Services, currently 10.3FTE Technical development Transition to new service infrastructure Review of data model, restructuring of content (orthodox adoption of Project Hydra models for structuring digital objects) Introduction of new discovery interface, faceted search Ongoing new content development

5 current phase (2014-) Refinement of data model and descriptive practices: linked data orientation Creation of new metadata preparation and workflow management tools Reconception of the applications stack: Old: SOA based on OAIS Reference Model, fedora services framework, search plugins New: administrative micro-services, repository services modeled on the OAIS Reference Model, fedora 3.X, search plugins, a range of modular services to expose data to end users in flexible ways via RESTful APIs

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7 API driven basis for web user experience basis for third-party integration of resources

8 API: Application Programming Interface What is an API? In computer programming, an application programming interface (API) specifies how some software components should interact with each other. Representational state transfer (REST) is an architectural style consisting of a coordinated set of architectural constraints applied to components, connectors, and data elements, within a distributed hypermedia system. What APIs are available? IIIF Image API 1.0 Geospatial Data API Quantitative Data API Linked Data API OpenSearch API Web API (query, view, get, download) unapi

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10 access to digital images: IIIF image API Scenario 1: serve static images Scenario 2: serve dynamic and specialised image resources JPEG2000: application services to deliver images in multiple formats, resolutions Georeferenced images (e.g., GeoTIFF), georeferenced + spatially rectified images

11 IIIF Image API: services architecture

12 IIIF Image API: query methods xml} gif png} Brief Examples:

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15 geospatial API Facilitate access to Cultural objects with a geographic association Monuments Places (structures, natural features, geopolitical boundaries) Maps Geospatial objects GeoTIFF and other spatially referenced images Shapefiles Remote sensing data (lidar, ECW images, etc.) Requirements: facilitate previews of spatial coverage of a resource; query interface to postgresql/postgis database; response formats to suit different communities needs

16 Geospatial API: query methods data.ucd.ie/api/geo/v1/dl/

17 Geospatial Data API: services architecture

18 application: distribution of resources in a virtual collection

19 application: distribution of respondents to qualitative survey

20 application: geographic coverage of LiDAR dataset

21 Geospatial API: point & boundary data with a historic basemap

22 application: geospatial text annotation

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25 application: spatial/temporal visualisation of publications in the Iberian sphere of influence

26 Quantitative Data API: services architecture

27 Quantitative Data API: query methods data.ucd.ie/api/geo/v1/quant/

28 Quantitative data API: quantitative survey dataset

29 semantic first integral to data model, integral to description, integral to dissemination/webapi

30 relation:ismemberof relation:hasmember structural metadata: object-to-object relationships

31 <mods xmlns:xlink=" xmlns:xsi=" xmlns=" version="3.5" xsi:schemalocation=" <titleinfo> <nonsort>the </nonsort> <title>four Courts</title> <subtitle>ruined interior</subtitle> </titleinfo> <name authority="naf" type="personal" authorityuri=" valueuri=" <namepart>fitzgerald, Desmond, </namePart> <role> <roleterm authority="marcrelator" authorityuri=" valueuri=" type="code">fmo</roleterm> <roleterm authority="marcrelator" authorityuri=" valueuri=" type="text">former owner</roleterm> </role> </name> <name type="personal"> <namepart>hogan, W. D.</namePart> <role> <roleterm authority="marcrelator" authorityuri=" valueuri=" type="code">pht</roleterm> <roleterm authority="marcrelator" authorityuri=" valueuri=" type="text">photographer</roleterm> </role> </name> <typeofresource>still image</typeofresource> <physicaldescription> <extent>1 still image : digital ; KB</extent> <form authority="marcform" authorityuri=" <reformattingquality>preservation</reformattingquality> <internetmediatype>image/gif</internetmediatype> <internetmediatype>image/jp2</internetmediatype> <internetmediatype>image/jpeg</internetmediatype> <digitalorigin>reformatted digital</digitalorigin> <note type="source characteristics" displaylabel="md5 checksum">95bba2d847e3f74202e285dc87c66d77</note> </physicaldescription> <genre authority="bgtchm">photographs</genre> <abstract>photograph by W.D. Hogan of the ruined interior of the Four Courts. Debris and broken pillars lie around. The imposing statue of a judge has been badly damaged.</abstract> <subject authority="lcsh" authorityuri=" valueuri=" <geographic>ireland</geographic> <topic>history</topic> <temporal>civil War, </temporal> </subject> <subject> <topic authority="gmgpc" authorityuri=" valueuri=" <geographic> Ireland</geographic> <geographic>dublin</geographic> </subject> <subject> <name authority="naf" authorityuri=" valueuri=" type="corporate"> <namepart>four Courts (Dublin, Ireland)</namePart> </name> <cartographics authority="openstreetmap" authorityuri=" valueuri="urn:osm:place_id: "> <coordinates> , </coordinates> </cartographics> </subject> <subject> descriptive metadata: MODS serialisation

32 <rdf:rdf xmlns:bibo=" xmlns:marcrel=" xmlns:cc=" xmlns:ore=" xmlns:dc=" xmlns:owl=" xmlns:dcterms=" xmlns:void=" xmlns:foaf=" xmlns:geo=" xmlns:linked-data=" xmlns:rdfs=" xmlns:rdf=" <rdf:description rdf:about=" <rdfs:label>four Courts</rdfs:label> <dc:title rdf:datatype=" Courts : ruined interior</dc:title> <dcterms:extent rdf:datatype=" still image : digital ; KB</dcterms:extent> <dcterms:publisher rdf:datatype=" Archives, University College Dublin</dcterms:publisher> <dcterms:publisher rdf:datatype=" Library, University College Dublin</dcterms:publisher> <rda:placeofpublication xmlns:rda=" rdf:datatype=" Ireland</rda:placeOfPublication> <rda:placeofpublication xmlns:rda=" rdf:datatype=" Dublin 4, Ireland</rda:placeOfPublication> <rda:placeofpublication xmlns:rda=" rdf:datatype=" Dublin 4, Ireland</rda:placeOfPublication> <dcterms:identifier rdf:resource=" <dcterms:abstract rdf:datatype=" by W.D. Hogan of the ruined interior of the Four Courts. Debris and broken pillars lie around. The imposing statue of a judge has been badly damaged.</dcterms:abstract> <dcterms:created rdf:datatype=" <dcterms:format rdf:resource=" <dcterms:format rdf:resource=" <dcterms:format rdf:resource=" <rdf:type rdf:resource=" <rdf:type rdf:resource=" <rdf:type rdf:resource=" <dcterms:contributor rdf:resource=" rdfs:label="fitzgerald, Desmond, "/> <dc:contributor rdf:datatype=" W. D.</dc:contributor> <dcterms:ispartof rdf:resource=" <ore:isaggregatedby rdf:resource=" <ore:isdescribedby rdf:resource=" <dcterms:spatial rdf:resource=" rdfs:label="four Courts (Dublin, Ireland)"/> <geo:lat_long> , </geo:lat_long> <dcterms:subject rdf:resource=" rdfs:label="ireland--history--civil War, "/> <dc:subject rdf:datatype=" <dc:subject rdf:datatype=" damage--war damage</dc:subject> <dc:subject rdf:datatype=" <ore:aggregates rdf:resource=" <foaf:depiction rdf:resource=" <ore:aggregates rdf:resource=" <foaf:isprimarytopicof rdf:resource=" </rdf:description> <rdf:description rdf:about=" <rdfs:label>photographs</rdfs:label> <dcterms:format rdf:resource=" <dcterms:format rdf:resource=" <dcterms:format rdf:resource=" <rdf:type rdf:resource=" <rdf:type rdf:resource=" <ore:isdescribedby rdf:resource=" <ore:isaggregatedby rdf:resource=" </rdf:description> descriptive metadata: RDF-XML serialisation

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34 Web API: requesting RDF metadata VoID ( URI HTML5 RDF-XML ntriples nquads TRiX JSON HTTP content negotiation example HTTP/ OK Date: Sat, 22 Mar :39:56 GMT Server: Apache/ (Ubuntu) X-Powered-By: PHP/ ubuntu3.9 Pragma: Cache-Control: no-store, no-cache, must-revalidate Expires: Sat, 26 Jul :00:00 GMT Last-Modified: Sat, 22 Mar :39:56 GMT Cache-Control: post-check=0, pre-check=0 Content-Length: Content-Type: text/rdf+n3; charset=utf-8 curl -I -L

35 SPARQL endpoint (Virtuoso)

36 (also consumption of linked data: Europeana)

37 Opensearch API OpenSearch: OpenSearch description document template: q={searchterms} &start={startindex?} &count={count} Example: Responses in RSS 2.0 or JSON formats

38 Web API Responsive web site (Bootstrap 3.X) built over lean MVC web application Web API methods: q (query == search) view HTML5 page views RDF content negotiation get (content delivery, streamed) export (citation export) download (content delivery, download)

39 digital.ucd.ie

40 Q & A / Discussion Contact: digital.library@ucd.ie Presenter: john.b.howard@ucd.ie