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

Base URL

• Base-URL (proposal 1) - base URL of the core-service is appended with the URL of the new-service

    <core-service-url>/md-store 

e.g.

    http://coreservice.mpdl.mpg.de/md-store

• Base-URL (proposal 2) - separate URL for the new service is provided (independently of the core-service URL)

    <service-url>

e.g.

    http://md-store.mpdl.mpg.de

Interface Methods URL

• For retrieval of the complete resource from the MD store (properties + all metadata record graphs)

    <base-url>/<resource-id>

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

    <base-url>/<resource-id>/md-records 

• For single metadata record graph

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

• For properties graph

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

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