Persistent, LocationIndependent, Resource Identifier Proposal

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Persistent, Location-Independent, Resource
Identifier Proposal

• Dan Rehak
• 6 December 2000

2
Presentation Overview

• Issues
• Scope of Work Proposal
• Technical Proposal
• Strawman
• Examples
• BNF

3
Issues

• Need for persistent, location-independent,
  resource identifiers
• Need in multiple standards and specs
• Different approaches to date
• A common solution has not yet been identified
• Lack of solution is an obstacle

4
Scope of Work Proposal

• Develop a common approach for, resource
  identifiers across all IMS Specs
• Definition and schema
• Spec harmonization
• Best practice guides
• Create any essential infrastructure to enable
  use of unique identifiers.
• Registration / Registry
• Prototypes Implementation

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Technical Proposal

• Build on existing practice and specs
• Provide maximum flexibility
• Minimize essential infrastructure

6
Strawman

• IEFT URN as base scheme
• Use as is when appropriate
• Create IMS URN Namespace
• Develop IMS NSS Model
• Source label
• Sourced id
• Details to be completed

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Examples

• URNs based on registered organizational NIDs
• URNNETG12345678901234567890
• URNCMU(12-411-2.0)\homework\incometax\deprec\top
  ic\question\Module12-v02-0010v1.1
• URN within the IMS NID using a formal NIS scheme
• URNIMS-PLIRID-V0ISBN0-201-83599-1.
• URN within the IMS NID using a the IMS NIS scheme
  
• URNIMS-PLIRID-V06ba7b8149dad11d180b400c04fd430c
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• URN within the IMS NID using a sourced NSS
  without a scheme.
• URNIMS-PLIRID-VODUNS05-218-41166ba7b8149dad11
  d180b400c04fd430c8

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ltGUIDgt   lt3rd Party URNgt ltExperimental URNgt
ltIMS URNgtlt3rd Party URNgt   "URN"
ltregistered nidgt "" ltregistered nssgtltregistered
nidgt   formal registered NID as defined in RFC
2611ltregistered nssgt   NSS which corresponds
to scheme registered for NIDltExperimental URNgt
  "URN" ltExperimental nidgt ""
ltnssgtltExperimental NIDgt   "X-"ltNIDgtltNIDgt
  ltNIDgt as defined in RFC 2141ltNSSgt  
ltNSSgt as defined in RFC 2141ltIMS URNgt  
"URN" ltIMS NIDgt "" ltIMS NISgtltIMS NIDgt  
formal registed NID as defined in RFC 2611,
ltNIDgt syntax as defined RFC 2141ltIMS NISgt
  ltFormal NIS Schemegt ltIMS NIS
SchemegtltFormal NIS Schemegt   ltScheme labelgt
ltdelimitergt ltScheme identifiergtltIMS NIS Schemegt
  ltIMS Unsourced Schemegt ltIMS Sourced
SchemegtltIMS Unsourced Schemegt   ltdelimitergt
ltDCE UUID/GUIDgtltDCE UUID/GUIDgt   string
generated by DCE UUID/GUID algorithmltIMS Sourced
Schemegt   ltSourcegt ltdelimitergt
ltSchemegtltSourcegt   ltSource labelgt ltdelimitergt
ltSource identifiergtltSchemegt   ltScheme labelgt
ltdelimitergt ltScheme identifiergtltSource labelgt
  string which conforms to ltNSSgt as defined in
RFC 2141ltSource identifiergt   string which
conforms to ltNSSgt as defined in RFC 2141ltScheme
labelgt   string which conforms to ltNSSgt as
defined in RFC 2141ltScheme identifiergt  
string which conforms to ltNSSgt as defined in RFC
2141ltdelimitergt   single character to be
selected