LTER, PASTA, and persistent identifiers LTER IMC Water Cooler Series 10-11 January 2011.

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Presentation transcript:

LTER, PASTA, and persistent identifiers LTER IMC Water Cooler Series January 2011

Water Cooler Objectives Inform Discuss Listen

What is a persistent identifier? Persistent identifiers are used to uniquely identify a resource (digital object) on the Internet or other network o "Persistent" such that the resource is addressable regardless of its physical location (notwithstanding security issues) o "Unique" such that the identifier addresses only a single resource within a given scope

Persistent identifier schemes Handle System/Digital Object Identifiers (DOIs) o protocol:prefix/suffix o e.g., DOI: /193 or Life Science Identifiers (LSIDs) o urn:lsid:authority:namespace:object:revision o e.g., urn:lsid:gdb.org:GenomicSegment:GDB Persistent Uniform Resource Locators (PURLs) o Uses HTTP response code 302 (simple redirect) and redirect to source URL o e.g.,

Similar approach in all schemes

Persistent Identifiers and LTER Scope: a string that logically binds the EML document to a particular namespace Identifier: a positive integer that is used as an 'accession number' to uniquely identify the EML document as describing a specific data set within a particular namespace Revision: a positive integer that represents the state of an EML document EML PackageID = Scope.Identifier.Revision

Persistent Identifiers and PASTA Decompose the EML PackageId into RESTful URI patterns / / / /[entity_name] Metadata: metadata/eml/ / / Data: data/eml/ / / / Full URI pattern with service

Persistent Identifiers and PASTA 1. Read an EML document with packageId "knb-lter-lno.235.4": 2. List all revisions for EML document "knb-lter-lno.235": 3. List all revisions for EML document "knb-lter-lno": 4. Read data entity "my_data" associated with packageId "knb-lter-lno.235.4": 5. List all data entities associated with packageId "knb-lter-lno.235.4":