Corporation For National Research Initiatives DOIs and the Handle System 7 May 1998 Larry Lannom CNRI

Corporation For National Research Initiatives DOIs and the Handle System u DOIs are an application of the Handle System u The Handle System is a distributed computer system for naming digital objects and storing the names and the information that is needed to locate and access these items via the Internet.

Corporation For National Research Initiatives Digital Object Architecture Client Repository / Collections Resolution System Search Engines Metadata Databases Catalogues, Guide, etc. Resource Discovery

Corporation For National Research Initiatives Handle System Initiatives u IDF (International DOI Foundation) u Library of Congress –National Digital Library Program –U.S. Copyright Office u NCSTRL (Networked Computer Science Technical Reports Library) u DTIC (Defense Technical Information Center) u USIA (U.S. Information Agency) u NMPA (National Music Publishers Association)

Corporation For National Research Initiatives Handles Resolve to Typed Data Handle data loc.ndlp/amrlp URLhttp:// HandleData type RAPloc/repository URLhttp:// Extensible Data Types XYZ

Corporation For National Research Initiatives HS #n HS #n which may be replicated Handle Resolution Client Handle SystemGHS LHS is a collection of Handle Services each of which consists of one or more Handle Servers HS #1 HS #2 HS #3 HS #n loc.ndlp/amrlp URL

Corporation For National Research Initiatives Handle Clients Handle Resolution Web Browser Handle Administration Handle System GHS LHS GHS LHS

Corporation For National Research Initiatives Handle Clients Web Browser Proxy Web Server HTTP Get Resolve Handle Handle Data HTTP Redirect Handle System Handle Administration GHS LHS GHS LHS Handle Resolution Web Browser

Corporation For National Research Initiatives Handle Clients Web Browser Handle Administration Handle System Browser Extension Resolve Handle Handle Data hdl: / Handle Resolution GHS LHS GHS LHS

Corporation For National Research Initiatives Local Resolution of Global Ids Web Browser Local Client Local collection Global Resolution System hdl:10.123/ /456 = redirect Local Network/Environment (Harvard) Cache/Proxy

Corporation For National Research Initiatives Local Resolution of Global Ids Web Browser Local Client Local collection Global Resolution System hdl:10.789/abc hdl:10.789/abc abc.html Cache/Proxy ? Local Network/Environment (Harvard)

Corporation For National Research Initiatives Web Browser Local Client Local collection Local Network/Environment (Harvard) Cache/Proxy hdl:10.123/456 redirect Cache/Proxy Local Network/Environment (Ivy League) Local Resolution of Global Ids Global Resolution System

Corporation For National Research Initiatives hdl:10.123/456 urn:hdl:10.123/456 Handle Record Client Representation urn:hdl:10.123/%E6%97%A5%E6%9C%AC hdl:10.123/%E6%97%A5%E6%9C%AC Handle Syntax and I18N /456URLhttp://pub.com/doc.html /URLhttp:/ietf.org/japan.html hdl:10.123/ (UTF-8 Encoding)

Corporation For National Research Initiatives Electronic version of Journal of New Physics published by Famous Science Publishing Co. Handle Data and Metadata DOI: 10.XXXX/1234 URL: JN: Journal of New Physics TI: New Horizona AU: Bill Smith PG: AB: Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diem nonummy nibh euismod. Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diem nonummy nibh euismod Metadata Collection and DOI Registration

Corporation For National Research Initiatives Wholesale Metadata Collection Metadata Handle System Handle Data Other Data Services Handle data and metadata Metadata Collection and DOI Registration Collection Service Collection Service Indexes Filters Queries VARs

Corporation For National Research Initiatives Wholesale Metadata Collection Metadata Handle System Handle Data Other Data Collectors Handle data and metadata records Publisher 1Publisher 2Publisher 3Publisher n Metadata Collection and DOI Registration Collection Service Collection Service Indexes Filters Queries VARs

Corporation For National Research Initiatives Client Handle System Value Added Resellers Publisher 1 Publisher 2 Publisher 3Publisher n Publisher Collections Digital Object Architecture