Prototype JL API

[saulshanabrook]

In this branch I am working on a prototype of a JupyterLab API for the metadata service and a simple viewer, following the approach articulated in https://github.com/jupyterlab/jupyterlab-metadata-service/issues/23#issuecomment-501392454

• [x] Create ILinkedDataProvider
  • [x] Require get method that takes in URL and returns JSON LD linked data
• [x] Create LinkedDataRegistry extension
  • [x] Expose get method that takes in URL and returns flattened metadata
  • [x] Expose register method that takes in ILinkedDataProvider
• [x] Create sample extension that adds sample ILinkedDataProvider based on hard coded data
• [x] Create LinkedDataBrowser that has a URL field and displays displays the data.
  • [x] Links to other pieces of data should show be clickable and change the current URL
• [ ] Add another sample extension that queries some API for metadata and show how this is merged with other provider for one URL.

[saulshanabrook]

[saulshanabrook]

[saulshanabrook]

I am going to merge this in and make a release, to make it easier to install this for a demo. If we want to get back to any of the previous graphql work, we can pull it in from the git history,