The document discusses guidelines for exposing library, museum, and archive metadata in ways that support resource discovery across these sectors. It proposes a framework with four levels: bulk transfers of existing metadata formats, serving individual item descriptions, providing RDF data dumps, and implementing the full Linked Data approach of assigning URIs and linking to other data. While Linked Data is the ideal long-term approach, the guidelines acknowledge that simpler levels can also improve discovery and that uptake of complex technologies takes time.
They have left the building: The Web Route to Library UsersRichard Wallis
Keynote Presentation to the ACOC Seminar in Melbourne Australia 1st November 2013.
Reviewing how libraries need to look towards using Linked Data techniques and general vocabularies, such as Schema.org, to share their data with the wider web - helping the search engines to guide users back to library collections.
They have left the building: The Web Route to Library UsersRichard Wallis
Keynote Presentation to the ACOC Seminar in Melbourne Australia 1st November 2013.
Reviewing how libraries need to look towards using Linked Data techniques and general vocabularies, such as Schema.org, to share their data with the wider web - helping the search engines to guide users back to library collections.
Brief overview of linked data and RDF followed by use in libraries and archives. Originally delivered at OLITA Digital Odyssey 2014. Revised for the OLA Superconference 2015
Build Narratives, Connect Artifacts: Linked Open Data for Cultural HeritageOntotext
Many issues are faced by scholars, book researchers, museum directors who try to find the underlying connection between resources. Scholars in particular continuously emphasizes the role of digital humanities and the value of linked data in cultural heritage information systems.
Linked Data Basics Slot in WWW2012 Tutorial: Practical Cross-Dataset Queries on the Web of Data
http://latc-project.eu/events/www2012-tutorial-cross-dataset-queries
Brief overview of linked data and RDF followed by use in libraries and archives. Originally delivered at OLITA Digital Odyssey 2014. Revised for the OLA Superconference 2015
Build Narratives, Connect Artifacts: Linked Open Data for Cultural HeritageOntotext
Many issues are faced by scholars, book researchers, museum directors who try to find the underlying connection between resources. Scholars in particular continuously emphasizes the role of digital humanities and the value of linked data in cultural heritage information systems.
Linked Data Basics Slot in WWW2012 Tutorial: Practical Cross-Dataset Queries on the Web of Data
http://latc-project.eu/events/www2012-tutorial-cross-dataset-queries
The universe of linked data is rapidly expanding and our community is finding innovative ways to link and apply data. This session will cover several initiatives and projects using linked data to improve discovery and reuse of information.
Speakers: Richard Wallis, Technology Evangelist, OCLC; Tom Johnson, Digital Applications Librarian, Oregon State University
One day workshop Linked Data and Semantic WebVictor de Boer
As taught at UNIMAS July 2019. based on a three day summer school by Knud Hinnerk Moeller and Victor de Boer. Includes hands on excercises using SWI-Prolog ClioPatria
Overview of how data on the Web of Data can be consumed (first and foremost Linked Data) and implications for the development of usage mining approaches.
References:
Elbedweihy, K., Mazumdar, S., Cano, A. E., Wrigley, S. N., & Ciravegna, F. (2011). Identifying Information Needs by Modelling Collective Query Patterns. COLD, 782.
Elbedweihy, K., Wrigley, S. N., & Ciravegna, F. (2012). Improving Semantic Search Using Query Log Analysis. Interacting with Linked Data (ILD 2012), 61.
Raghuveer, A. (2012). Characterizing machine agent behavior through SPARQL query mining. In Proceedings of the International Workshop on Usage Analysis and the Web of Data, Lyon, France.
Arias, M., Fernández, J. D., Martínez-Prieto, M. A., & de la Fuente, P. (2011). An empirical study of real-world SPARQL queries. arXiv preprint arXiv:1103.5043.
Hartig, O., Bizer, C., & Freytag, J. C. (2009). Executing SPARQL queries over the web of linked data (pp. 293-309). Springer Berlin Heidelberg.
Verborgh, R., Hartig, O., De Meester, B., Haesendonck, G., De Vocht, L., Vander Sande, M., ... & Van de Walle, R. (2014). Querying datasets on the web with high availability. In The Semantic Web–ISWC 2014 (pp. 180-196). Springer International Publishing.
Verborgh, R., Vander Sande, M., Colpaert, P., Coppens, S., Mannens, E., & Van de Walle, R. (2014, April). Web-Scale Querying through Linked Data Fragments. In LDOW.
Luczak-Rösch, M., & Bischoff, M. (2011). Statistical analysis of web of data usage. In Joint Workshop on Knowledge Evolution and Ontology Dynamics (EvoDyn2011), CEUR WS.
Luczak-Rösch, M. (2014). Usage-dependent maintenance of structured Web data sets (Doctoral dissertation, Freie Universität Berlin, Germany), http://edocs.fu-berlin.de/diss/receive/FUDISS_thesis_000000096138.
This tutorial explains the Data Web vision, some preliminary standards and technologies as well as some tools and technological building blocks developed by AKSW research group from Universität Leipzig.
IFLA LIDASIG Open Session 2017: Introduction to Linked DataLars G. Svensson
At the IFLA Linked Data Special Interest Group open session in Wroclaw we briefly introduced the mission of the SIG and then went on to a brief introduction to what linked data is and why that topic is important to libraries.
The presentation was held jointly by Astrid Verheusen (general introduction to the SIG) and Lars G. Svensson (introduction to Linked Data)
This is part 2 of the ISWC 2009 tutorial on the GoodRelations ontology and RDFa for e-commerce on the Web of Linked Data.
See also
http://www.ebusiness-unibw.org/wiki/Web_of_Data_for_E-Commerce_Tutorial_ISWC2009
This is part 2 of the ISWC 2009 tutorial on the GoodRelations ontology and RDFa for e-commerce on the Web of Linked Data.
See also
http://www.ebusiness-unibw.org/wiki/Web_of_Data_for_E-Commerce_Tutorial_ISWC2009
Given at the annual Open Universiteit Informatics faculty research meeting on March 6, 2012. Video is at http://video.intranet.ou.nl/mediadienst/_website/php/external_video.php?Q=1056|videoID
Providing open data is of interest for its societal and commercial value, for transparency, and because more people can do fun things with data. There is a growing number of initiatives to provide open data, from, for example, the UK government and the World Bank. However, much of this data is provided in formats such as Excel files, or even PDF files. This raises the question of
- How best to provide access to data so it can be most easily reused?
- How to enable the discovery of relevant data within the multitude of available data sets?
- How to enable applications to integrate data from large numbers of formerly unknown data sources?
One way to address these issues to to use the design principles of linked data (http://www.w3.org/DesignIssues/LinkedData.html), which suggest best practices for how to publish and connect structured data on the Web. This presentation gives an overview of linked data technologies (such as RDF and SPARQL), examples of how they can be used, as well as some starting points for people who want to provide and use linked data.
The presentation was given on August 8, at the Hacknight event (http://hacknight.se/) of Forskningsavdelningen (http://forskningsavd.se/) (Swedish: “Research Department”) a hackerspace in Malmö.
Similar to Linked Data as an enabling framework for resource discovery across libraries, museums and archives (20)
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Linked Data as an enabling framework for resource discovery across libraries, museums and archives
1. Image by: ...-Wink-... @ Flickr
Linked Data as an enabling
framework for resource
discovery across
libraries, museums and
archives
Andy Powell (and Pete Johnston)
Eduserv
@andypowe11
www.eduserv.org.uk
2. What’s coming…
http://bit.ly/hmMvP1
• report on some work Pete Johnston and I
(both at Eduserv) undertook in March 2011
• on behalf of the JISC and RLUK Resource
Discovery Taskforce
• (which subsequently became “Discovery”)
• to develop some metadata guidelines for use
across libraries, museums, and archives
www.eduserv.org.uk
3. Functional requirement
• help libraries, museums and archives expose
existing metadata (and new metadata created
using existing practice) in ways that
– support the development of aggregator services
– integrate well with the web (and the emerging
web of data)
• note: NOT re-engineering cataloguing practice
in the LAM sectors
www.eduserv.org.uk
4. Guiding principles
• support the RDTF Vision
• in line with Linked Data principles
• based on the W3C Linked Open Data Star Scheme
• in line with Designing URI Sets for the UK Public
Sector
• take into account the Europeana Data Model and ESE
• be broadly in line with the notion of “making better
websites” across libraries, museums and archives
www.eduserv.org.uk
5. RDTF Vision
“making the most of UK scholarly and cultural
resources by best positioning their metadata for
discovery and reuse within the global
information ecosystem”
www.eduserv.org.uk
6. Linked Data
http://www.w3.org/DesignIssues/LinkedData.html
• use URIs as names for things
• use HTTP URIs so that people can look up
those names
• when someone looks up a URI, provide useful
information, using the standards
(RDF, SPARQL)
• include links to other URIs so that they can
discover more things
www.eduserv.org.uk
7. Linked Open Data Star Scheme
http://bit.ly/u1O7e3
• 1 star - make your stuff available on the Web
(whatever format) under an open license
• 2 star - make it available as structured data
(e.g., Excel instead of image scan of a table)
• 3 star - use non-proprietary formats (e.g., CSV
instead of Excel)
• 4 star - use URIs to identify things, so that people can
point at your stuff
• 5 star - link your data to other data to provide
context
www.eduserv.org.uk
8. Our draft RDTF proposal
• used the W3C Linked Open Data star scheme
as framework (at 3, 4 and 5 star levels)
• and suggested three approaches
– community formats
– RDF data
– Linked Data
• 196 comments – on pretty much all aspects of
the draft
www.eduserv.org.uk
10. The draft guidelines
Not-RDF RDF
Individual Item Linked Data
Descriptions
Collections “bulk “RDF Data”
of Descriptions transfer”
www.eduserv.org.uk
11. The Web!
Not-RDF RDF
Individual Item “page per Linked Data
Descriptions thing”
Collections “bulk “RDF Data”
of Descriptions transfer”
www.eduserv.org.uk
12. Guiding principles
• support the RDTF Vision
• in line with Linked Data principles
• based on the W3C Linked Open Data Star Scheme
• in line with Designing URI Sets for the UK Public
Sector
• take into account the Europeana Data Model and ESE
• be broadly in line with the notion of “making better
websites” across libraries, museums and archives
www.eduserv.org.uk
13. Semantics vs. linking
• moving left to right across the quadrants…
– offers greater semantic precision within a more
consistent framework (RDF)
“page per Linked Data
thing”
“bulk “RDF Data”
transfer”
www.eduserv.org.uk
14. Linking vs. semantics
• moving bottom to top across the quadrants…
– promotes the individual descriptions (rather than
collections of descriptions) and encourages the
assignment of identifiers (i.e. URIs) to both those
descriptions and the things they identify
“page per Linked Data
thing”
“bulk “RDF Data”
transfer”
www.eduserv.org.uk
15. Possible adoption path
Not-RDF RDF
Individual Item “page per Linked Data
Descriptions thing”
Collections “bulk “RDF Data”
of Descriptions transfer”
www.eduserv.org.uk
16. “page Linked
Bulk transfer per
thing”
Data
“bulk “RDF
transfer” Data”
• “give us what you’ve got”
• serve existing community bulk-formats (e.g. files
containing collections of
MARC, MODS, BibTeX, DC/XML, SPECTRUM or EAD
records) or CSV over RESTful HTTP
• use sitemaps and robots.txt and/or RSS/Atom to
advertise availability and GZip for compression
• for CSV, provide a column called ‘label’ or ‘title’ so
we’ve got something to display
• give us separate records (for CSV, read ‘rows’) about
separate resources (where you can)
www.eduserv.org.uk
17. “page Linked
Page per thing per
thing”
Data
“bulk “RDF
transfer” Data”
• “build better websites”
• serve an HTML page (i.e. a description) for every “thing”
of interest over RESTful HTTP
• optionally serve alternative format(s) for each
description (e.g. a MODS or DC/XML record) at separate
URIs and link from the HTML descriptions using “<link
rel=“alternative” … />
• use “cool” ‘http’ URIs for all descriptions
• use sitemaps and robots.txt and/or RSS/Atom to
advertise availability
• optionally offer OAI-PMH server to allow harvesting
www.eduserv.org.uk
18. “page Linked
RDF data per
thing”
Data
“bulk “RDF
transfer” Data”
• “RDF bulk download”
• serve big buckets of RDF (as RDF/XML, N-Tuples or N-
Quads) over RESTful HTTP
• re-use existing conceptual models and vocabularies
where you can
• assign URIs to every “thing” of interest
• use Semantic Sitemaps and the Vocabulary of
Interlinked Datasets (VoID) to advertise availability of
the buckets
www.eduserv.org.uk
19. “page Linked
Linked Data per
thing”
Data
“bulk “RDF
transfer” Data”
• “W3C 5 star approach”
• serve HTML and RDF/RDFa for every “thing” of
interest over RESTful HTTP
• assign ‘http’ URIs to every “thing” (and every
description of a thing)
• follow “cool URIs for the semantic web”
recommended practice
• become part of the web of data - link to other
people’s stuff using their URIs
www.eduserv.org.uk
20. Possible adoption path
Not-RDF RDF
Individual Item “page per Linked Data
Descriptions thing”
Collections “bulk “RDF Data”
of Descriptions transfer”
www.eduserv.org.uk
21. Where are we headed?
• implication of previous slide is that “5 star”
Linked Data is where we want to be
• some good reasons for that
– rich semantic framework
– “follow your nose” approach to getting more info
– “small pieces loosely joined”
– link and be linked – data becomes “of” the web
– relatively easy re-use of other peoples’ ontologies
www.eduserv.org.uk
22. But…
• also need to remember that “the best is
sometimes the enemy of the good”
• recent web history tells us that uptake of
complex technologies can be a slow process!
• certainly been the case with the Semantic
Web and RDF
www.eduserv.org.uk
23. ‘Linked’ and ‘social’ can be a win
http://ogp.me/
• Open Graph Protocol
• as proposed by Facebook but now more
widely adopted
• good example of Linked Data underpinning
social activity (part of which is related to
discovery)
• but what’s more important – the fact it uses
RDF or the fact it uses the HTTP URI?
www.eduserv.org.uk
25. Conclusions
• true Linked Data is a good aim for
libraries, museums and archives…
• …but our emphasis should be on the ‘linked’
in short term
• encouraging more item-level material on the
Web with cool URIs (even if only in largely
human-readable form)
• richer Linked Data can then emerge over time
www.eduserv.org.uk