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Below you will find a growing list of frequently asked questions regarding Exploring Linked Data’s goals and functionality. The list of questions will continue to grow throughout the period of the IMLS grant and on into the DCMI era.

Do all good things have to come to an end? No. Long-term sustainability of the Exploratorium and its infrastructure after the close of the grant period has been a key part of the grant planning. The Dublin Core Metadata Initiative (DCMI) has been a strategic partner since the IMLS planning grant in 2011-2012. DCMI is one of the oldest –if not the oldest– continuously operating organizations experienced in Web-based crowd-sourcing of expertise. DCMI is already playing a key role in fulfilling the LD4PE grant’s promise and is committed to the integration of the LD4PE infrastructure, content, and ongoing operation into its strategic agenda for metadata education, training, and workforce development.

As part of the project, the team has developed a new toolkit of AngularJS editors for creating learning resource descriptions using an application profile of schema.org (LRMI); and, creating competency frameworks based on an application profile of the Achievement Standards Network Description Language (ASN-DL). The tools are designed to function in the browser through direct action with the triplestore and totally independent of the LD4PE WordPress implementation they currently serve. As a result, when publicly released in the first quarter of 2016, the two editors in the toolkit can be used by anyone, can be refactored (with a little AngularJS expertise) to create schema.org descriptions based on more than one application profile using different controlled vocabularies and different competency indexes.

Yes, the infrastructure of the Exploratorium includes not only the WordPress front end, but also an RDF triple store containing the learning resource descriptions as well as controlled vocabularies (SKOS) and other data. The competency index is also modeled and available in RDF.


For a fuller description of how all these parts fit together, see the LD4PE Overview Briefing Paper.

Not during the IMLS grant period. The 2-year grant period is intended to accomplish three significant tasks:

  1. Create the Competency Index for RDF and Linked Data (CI-RDF) through crowd-sourcing metadata community expertise;
  2. Populate the Exploratorium with learning resource descriptions that have been mapped to individual competencies and benchmarks in the competency index; and
  3. Develop best-practice documentation on the processes of community development of competency indexes and learning resource descriptions as well as leveraging crowd-sourced expertise through social mechanisms to rank learning resources.

So, yes, when we have completed these three tasks including a useful version of CI-RDF, DCMI will look to community development of competencies covering other metadata areas using the development best practices documented during the IMLS project—e.g., ontologies (CI-O), knowledge organization systems (CI-KOS), application profiles (CI-AP), and cataloging (CI-CAT).

Yes! Competency frameworks, or indexes, are living works containing statements of socially expected knowledge, skills, and habit of mind for professional work that continue to evolve at a measured pace as the context of their application changes. In addition to being able to comment on each competency in the Exploratorium, you will also have a means to suggest new competencies to the Competency Index Editorial Board (CIEB) for RDF and Linked Data.

Yes! While we are adding Learning Resource descriptions centrally during the development of the Exploratorium and the seeding of its collection, we will make available easy to use, browser-based metadata-creation tools so people can submit descriptions of Learning Resources they discover and want to share. This AngularJS Learning Resource editor will be linked to the Competency Index for RDF and Linked Data (CI-LD) for mapping to specific competencies relevant to the Learning Resource.

While the vast majority of the resources described are free, you will also find resources that are fee-based or under license.