1. Larry Lannom DOI Workshop Reston, VA 19 September 2000
DOI Resolution Issues
Larry Lannom
DOI Workshop
Reston, VA
19 September 2000

2. DOI Resolution Issues Basic Handle Resolution Capabilities
Contextualization
Parameterization
Larry Lannom Sep 00

3. Handles Resolve to Typed Data
Data type
Index
Handle data
10.123/456
URL 3 3
URL 2 9
URL 5 9 MD 10
999 EM 9 9 IP
10.456/789 4
Larry Lannom Sep 00

4. The Two Types of Handle Query
1. Request all data
Handle System
Handle
Client
Give me all data associated with handle /123. 3 2 5 10 9 4
/123
URL1(Server in US)
URL2 (Server in Asia)
URL3 (Server in Europe)
public key
address
rights data
URL PK EM IP
Index
Type
Data
Handle 3 2 5
/123
URL1(Server in US)
URL2 (Server in Asia)
URL3 (Server in Europe)
URL
Index
Type
Data
Handle
Give me all data of type URL associated with handle /123.
Client
2. Request all data of a given type
Handle System
Corporation For National
Research Initiatives
Larry Lannom Sep 00

5. Handle Protocol/Data Model
Multiple typed values per handle
Extensible typing
Query by type
Larry Lannom Sep 00

6. Future Resolution - Scenario 1
Some other handle aware process uses a DOI to contact the Handle System and request all URLs associated with that DOI. . .
Handle System
Some
Other
Process
(2) / 3 2 5 10 9 4
URL PK EM IP
URL1(Server in US)
URL2 (Server in Asia)
URL3 (Server in Europe)
public key
address
rights data
(1)
doi: /
Internet
Larry Lannom Sep 00

7. Future Resolution - Scenario 1
. . . and then ranks those URLs based on performance or best location . . .
Handle System
Some
Other
Process
(3) / 3 2 5
URL
URL1 (Server in US)
URL2 (Server in Asia)
URL3 (Server in Europe)
Larry Lannom Sep 00

8. . . . chooses the best one, and resolves it.
Future Resolution - Scenario 1
. . . chooses the best one, and resolves it.
Some
Other
Process
URL2 (Server in Asia)
(4)
URL2 (Server in Asia)
Larry Lannom Sep 00

9. Future Resolution - Scenario 1
A process might use an address, rights data, or other current state data.
Handle System
Some
Other
Process
(3)
(2)
/46578 3 2 5 10 9 4
URL PK EM IP
URL1(Server in US)
URL2 (Server in Asia)
URL3 (Server in Europe)
public key
address
rights data
(4)
rights data
(1)
doi: /46578
Larry Lannom Sep 00

10. Future Resolution - Scenario 2
User clicks on a DOI embedded in an XML document.
Future Application
with native
understanding
of handles
and XML
(1)
doi: /5467
XML file with embedded DOI
Larry Lannom Sep 00

11. The application connects to the Handle System . . .
Future Resolution - Scenario 2
The application connects to the Handle System . . .
Handle System
Future Application
with native
understanding
of handles
and XML
(2)
/5467 3 2 9 4
URL IP EM MD
Larry Lannom Sep 00

12. Future Resolution - Scenario 2
. . . and retrieves DOI data.
Future Application
with native
understanding
of handles
and XML
(3)
/5467 3 2 9 4
URL IP EM MD
Larry Lannom Sep 00

13. Application analyzes the data associated with that DOI.
Future Resolution - Scenario 2
Application analyzes the data associated with that DOI.
Future Application
with native
understanding
of handles
and XML
URL IP EM MD
Larry Lannom Sep 00

14. XML file with embedded DOI
Future Resolution - Scenario 2
and dynamically displays for the user, as a mouseover, a list of options based on the data in the DOI System.
Future Application
with native
understanding
of handles
and XML
(5)
1. Retrieve document
2. Explain rights
3. query
4. Show metadata
XML file with embedded DOI
Larry Lannom Sep 00

15. User selects which path to follow. XML file with embedded DOI
Future Resolution - Scenario 2
User selects which path to follow.
Future Application
with native
understanding
of handles
and XML
(6)
1. Retrieve document
2. Explain rights
3. query
4. Show metadata
metadata record
XML file with embedded DOI
Larry Lannom Sep 00

16. Contextualization: Current
Article with
CrossRef
Link
Client
XYZ University
/123
Handle System
dx.doi.org
acme.pub
/123
pg1.html
Local copy
Corporation For National
Research Initiatives
Larry Lannom Sep 00

17. Understands SFX Cookies
Contextualization: First Experiment (Hardcoded CrossRef)
localCopy.html
Article with
CrossRef
Link
Client
Local SFX Server
XYZ University
Handle System
dx.doi.org
Understands SFX Cookies
CrossRef
/123?cookie
Redirect to local SFX Server
Metadata?
Metadata
Larry Lannom Sep 00

18. Understands SFX Cookies Metadata Collection Service
Contextualization: Second Experiment (MD Indirection)
XYZ University
Client
Article with
CrossRef
Link
Local SFX Server
localCopy.html
Handle System
dx.doi.org
Understands SFX Cookies
Meta1.com
Metadata Collection Service
/123?cookie
Redirect to local SFX Server
Metadata location?
Meta1.com
Metadata?
Metadata
Larry Lannom Sep 00

19. Handle URI Parameters
Instructions to client on interacting with handle system
type=PK
query=Authoritative
Instructions to client on further actions to take with return values
URLsuffix=ABC
Instructions to client on further actions to take with returned object
loc=chap23
Larry Lannom Sep 00

20. Handle URI Syntax (type=PK)@10.123/456
10.123/456!type=PK?subject=accounts
10.123/456?type=PK&subject=accounts
etc - still in play
Larry Lannom Sep 00