ELFIE

Environmental Linked Features Interoperability Experiment

The ELFIE is intended to test existing OGC and W3C standards with the goal of establishing a best practice for exposing links between and among environmental domain and sampling features in a highly adoptible standards compliant way that is compatible with modern web search technology.

The ELFIE Engineering Report can be found here.

Slides summarizing the ELFIE plan at the project’s outset can be found here.

A summary of the IE outcomes can be found here.

A presentation recording of the IE outcomes slides can be found here.

The IE is focused on two cross-domain use cases:
1) exposing topological and domain feature model relationships between features and
2) description of sampling data available for and linked to sampled domain features

While addressing these use cases, the IE has aimed to address issues of encoding data as specific views of a linked data graph that would be passed between systems. These linked data graph views are expected to support archictures involving linked data catalogs and registries.

For example, data providers can use the linked data graph views as a way to advertise their monitoring or domain features to catalogs or other applications that want to crawl and index available data. Similarly, integrated catalogs that index and construct links between features can use the views as a linked data response to search queries.

Slides summarizing how environmental domain use cases were used for ELFIE can be found here.

The primary technical outcome of ELFIE is a collection of JSON-LD contexts. They are described here: JSON-LD Contexts

The IE has produced numerous experimental demonstration JSON-LD instance files. The full list is available here as html preview files and plain .json files: ELFIE Demo Files

The IE has produced a number of demonstration visualizations. The list below will grow as the IE is wrapped up.