Dokumentation Session 4-1
13:40-15:15 - Raum 44.21
persistent identifier & controlled vocabularies problem: everyone experienced linksrot - links on older websites leading to nowhere, since the target page/object has moved. for an OER repo we want to prevent that
PI help to solve that problem technologies: handle (HDL), DOI, URN, purl … all those technologies base on the principle of handing out IDs/names that get resolved by a url-stable resolver service and redirect to the URL associated with the ID. e.g. https://hdl.handle.net/20.500.13037/OERQZMTQOSU resolves to the object https://oer-repo.uibk.ac.at/edu-sharing/components/render/eb6a9048-9e7e-490e-a1f9-954c77fec332?viewType=1
HDL:
- prefix gets registered at a registry (e.g. http://handle.net/) for some money (300 USD for 5 years)
- handle server installed locally
- repository configured to register new handles and associate the URLs
- changes of the locations of the object need to be updated on the handle server
- proxy system that distributes handles across different resolvers (also to doi.org: https://doi.org/20.500.13037/OERQZMTQOSU)
DOI:
- technically the same as HDL
- adds a layer of policy (e.g. persistence of landingpage of deleted objects)
- metadata needs to be submitted for registered DOIs (datacite schema)
- metadata from datacite gets harvested by others; item will be more visible, more popular; (e.g. Google Dataset Search, OpenAIRE)
- can cost money per id (~80 cents)
w3id:
- community driven persistent url service;
- maintained by W3C Permanent Identifier Community Group
- simple system based on htaccess rewrite rules for apache httpd
- maintained in git repo: https://github.com/perma-id/w3id.org
- join our w3id namespace oerBASE https://github.com/oerBASE/w3id.org/tree/master/oerbase by contacting andreas.parschalk@uibk.ac.at or julia.schindler@uibk.ac.at
- example: https://w3id.org/oerbase/profiles/lomuibk/latest/schemas/lom-uibk.xsd
controlled vocabularies:
reasoning: using clearly defined vocabularies e.g. as keywords or for classification of objects makes interoperability between systems possible. vocabularies can be mapped from one to another across languages and domains and could also be mapped/normalised by metadata aggregators.
controlled vocabularies used in oer in innsbruck:
- oefos (austrian fields of science: https://vocabs.acdh.oeaw.ac.at/oefos/de/ https://w3id.org/oerbase/vocabs/oefos2012/schema.json)
- SDG (1st level only):
- hcrt learning resource type (https://w3id.org/kim/hcrt/scheme)
other possibly useful controlled vocabularies/taxonomies for classification
- DDC
- GND Schlagwortkatalog
Discussion:
- newer öfos version
- iconclass
- using wikidata objects: e.g https://www.wikidata.org/wiki/Q7991