Metadata and Vocabulary Standards for NIST Data

This page provides pointers to the various metadata and vocabulary standards used to serve and manage NIST data as part of NIST's open data initiative (Open Access to Research).

Table of Contents

• NIST Extensible Resource Data Model (NERDm)
• Project Open Data (POD)

NIST Extensible Resource Data Model (NERDm)

The NIST Extensible Resource Data Model (NERDm) refers to the JSON-LD-formatted metadata schema used by the NIST Public Data Repository (PDR) and Science Data Portal internally to describe data resources available from NIST. It is defined using JSON Schema.

Resources

• A Reader's Guide to NERDm Metadata
• JSON Schema definition files:
  • NERDm Core (latest): nerdm-schema-0.3.json (v0.2, v0.1)
  • Extension: Publications (latest): nerdm-schema-0.3.json (v0.2, v0.1)
• JSON-LD context files:
  • nerdm-schema-context.jsonld
  • nerdm-pub-context.jsonld

Project Open Data (POD)

The Project Open Data (POD) schema is used to describe data resource available from across the US Government. It is also JSON-LD-formatted. The PDR supports it as an output metadata format.

Resources

• About Project Open Data (Policy, history, and pointers for guidance)
• POD Metadata Schema v1.1
• JSON Schema definition files (v1.1):
  • catalog.json
  • dataset.json
  • distribution.json
• JSON-LD Context files:
  • catalog.jsonld