MD Store

Introduction

The MD Store is a triple store for medatada storage and management. It is part of the process for massive batch metadata update for eSciDoc objects.

Technologies

• The triple store technology is Jena SDB (TDB doesn't support transactions)
• eSciDoc: The MD Store uses eSciDoc security management (AA)
  • It should be generic to enable other services to log in into MDstore

Interface

• The MD Store has a REST interface:
  • GET: returns metadata triple
  • POST: create a new metadata triple
  • PUT: Update a metadata triple
  • DELETE: Delete a metadata triple

URL definition

• Proposal: keep the URL of the REST interface in the following manner:
  • For metadata records graph (NOTE: there can be several metadata records managed in the MD Store for a resource)

    <base-url>/<resource-id>/metadata/<md-record-id> 

• • For properties graph (NOTE: there can be several metadata records managed in the MD Store for a resource)

    <base-url>/<resource-id>/properties

• • Base-URL (proposal 1)

    <core-service-url>/md-store

• • Base-URL (proposal 2)

    <service-url e.g. md-store.mpdl.mpg.de>

Data Model

• The MD Store defines 2 rdf graphs:
  • Metadata graphs, where metadada triple are stored
  • Property graphs with: context-id, public status, lock-status, content-model-id

Metadata

Enhanced Scientific Documentation

Representational State Transfer

Uniform Resource Locator