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LTER, PASTA, and persistent identifiers

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

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LTER, PASTA, and persistent identifiers

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  1. LTER, PASTA, andpersistent identifiers LTER IMC Water Cooler Series 10-11 January 2011

  2. Water Cooler Objectives • Inform  • Discuss • Listen

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

  4. Persistent identifier schemes • Handle System/Digital Object Identifiers (DOIs) • protocol:prefix/suffix • e.g., DOI:10.1045/193 or http://dx.doi.org/10.1045/193 • Life Science Identifiers (LSIDs) •  urn:lsid:authority:namespace:object:revision • e.g., urn:lsid:gdb.org:GenomicSegment:GDB132938 • Persistent Uniform Resource Locators (PURLs) • Uses HTTP response code 302 (simple redirect) and redirect to source URL • e.g., http://purl.publisher.com/journal/article_id

  5. Similar approach in all schemes

  6. Persistent Identifiers and LTER EML PackageID = Scope.Identifier.Revision • 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

  7. Persistent Identifiers and PASTA • Decompose the EML PackageId into RESTful URI patterns <context>/<scope>/<identifier>/<revision>/[entity_name] • Full URI pattern with service Metadata: metadata/eml/<scope>/<identifier>/<revision> Data: data/eml/<scope>/<identifier>/<revision>/<entity_name>

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

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