1. Two From the SFX Toolbox: A Plugin and an Target Parser Rich Wenger, E-resource Systems Manager MIT Libraries

2. Agenda 1.Conditional display of Aleph print holdings on the SFX menu. 2.Differential resolution of hdl.handle.net URLs. SFX Aleph | ELUNA 2014 Page 2

3. Part 1. Conditional display of Aleph print holdings on the SFX menu. SFX Aleph | ELUNA 2014 Page 3

4. Context 1.We recently completed a redesign of our SFX menu. 2.Our Aleph records have print and electronic holdings on the same record: “piggybacking”. 3.A philosophical change to our handling of Aleph holdings on the SFX menu: “The American judicial system does not promise justice. It promises a chance at justice” -Paul Newman in The Verdict SFX Aleph | ELUNA 2014 Page 4

5. Components 1.A modified version of the ALEPH.pm plugin 2.A modified version of the parser for the Aleph target 3.A modified target displayer for Aleph holdings on the SFX menu 4.A modified version of getHolding_ALEPH.tmpl 5.Modifications to the Aleph target 6.A target threshold to avoid looping to/from Aleph SFX Aleph | ELUNA 2014 Page 5

6. Some Simplifying Assumptions 1.No title searches in Aleph Setting in config/aleph_xserver_lookup.config 2.ISSN or ISBN only 3.Suppress “multiple records” message SFX Aleph | ELUNA 2014 Page 6

7. Plugin ALEPHMIT.pm 1.Based on the standard ALEPH.pm plugin 2.Retrieves the document number from the first call to the Aleph x-server and stores it in the context object 3.Filters e-holdings from the holdings returned from Aleph 4.Reformats the holdings array to consolidate Location and Collection onto one line. SFX Aleph | ELUNA 2014 Page 7

8. Holdings array SFX Aleph | ELUNA 2014 Page 8 Barker Library Microforms v.92 (1970)-v.95 (1973),v.97 (1975)-v.119 (1997) Library Storage Annex Journal Collection v.81 (1959)-v.131:no.1-6 (2009)

9. Holdings array SFX Aleph | ELUNA 2014 Page 9 Barker Library - Microforms v.92 (1970)-v.95 (1973),v.97 (1975)-v.119 (1997) Library Storage Annex - Journal Collection v.81 (1959)-v.131:no.1-6 (2009)

10. Target Parser ALEPHMIT.pm 1.Based on the standard ALEPH.pm target parser 2.Retrieves the document number from the context object and creates a URL pointing to a specific Full record in Aleph SFX Aleph | ELUNA 2014 Page 10

11. Target Displayer ALEPHMIT.pm 1.Based on the standard ALEPH.pm target displayer 2.Modifies the holdings array by inserting a blank line ( ) between each set of holdings. SFX Aleph | ELUNA 2014 Page 11

12. Holdings array SFX Aleph | ELUNA 2014 Page 12 Barker Library - Microforms v.92 (1970)-v.95 (1973),v.97 (1975)-v.119 (1997) Library Storage Annex - Journal Collection v.81 (1959)-v.131:no.1-6 (2009)

13. Template getHolding_ALEPH.tmpl 1.Based on the standard getHolding_ALEPH.tmpl 2.Adds a third variable to the template to accommodate the added line in the holdings array. 3.ExampleExample SFX Aleph | ELUNA 2014 Page 13

14. Part 2. Differential resolution of handle URLs. SFX Aleph | ELUNA 2014 Page 14

15. The problem Some hdl.handle.net URLs resolve to targets that should be proxied e.g. Harvard Dataverse Network, and some resolve to targets that should NOT be proxied e.g our DSpace instances. SFX Aleph | ELUNA 2014 Page 15

16. Context 1.SFX must resolve handle URLs differently depending on the target of the resolved handle. 2.Proxying the handle server itself is too big a hammer, too far up stream. 3.We want a decision point when the handle is resolved. SFX Aleph | ELUNA 2014 Page 16

17. Components 1.A local target, 856_URL_LCL 2.A local target parser 3.An external script 4.A Display Logic rule SFX Aleph | ELUNA 2014 Page 17

18. Local target 856_URL_LCL 1.getFullTxt service 2.Global threshold: $obj->need('856_url') && $obj- >need('856_url','=~','/hdl.handle.net/i') 3.Parser: HDL::handle 4.Parse param: ‘ external_url=http://library.mit.edu/cgi-bin/handle_url.cgi?parm=‘ SFX Aleph | ELUNA 2014 Page 18

19. Local target parser HDL::handle 1.Retrieves the 856_URL from the context object 2.Retrieves the URL for external script from the parse param. 3.Returns URL for the target in the form: http:// ?parm=http:hdl.handle.net/ SFX Aleph | ELUNA 2014 Page 19

20. External script handle_url.cgi 1.Get and decode the URL from the parm and isolate the handle domain e.g. http://hdl.handle.net/1721.1/78487 2.If it is one of our DSpace domains, redirect to the handle server. SFX Aleph | ELUNA 2014 Page 20

21. External script handle_url.cgi… 1.Otherwise, send the handle to the handle server API: http://hdl.handle.net/api/1902.1/21446 Receive and decode the JSON response, and extract the target URL Construct a URL for the proxy server and redirect: http://libproxy.mit.edu/login?url=http://thedata.harvard.edu /dvn/study?globalId=hdl:1902.1/21446 SFX Aleph | ELUNA 2014 Page 21

22. Display Logic rule If available target 856_URL_LCL, any service Do not show 856_URL, any service. SFX Aleph | ELUNA 2014 Page 22

23. handle_url.cgi SFX Aleph OPAC Browser Z39.50 MARC record fetch 856_URL_LCL Intl. Country Risk Guide http://sfx.edu/sfx_local/?title=ICRG&…. 856_url: $uhttp://hdl.handle.net/1902.1/21446

24. handle_url.cgi hdl.handle.net/api Proxy Server http://thedata.harvard.edu Parm= http://hdl.handle.net/1902.1/21446 http://libproxy.mit.edu/login?url =http://thedata.harvard.edu http://hdl.handle.net/api/1902.1/21446

25. Improvements SFX Aleph | ENUG 2013 Page 25 Move the external script logic into the target parser

26. Finis SFX Aleph | ENUG 2013 Page 26 Rich Wenger rwenger@mit.edurwenger@mit.edu Phone 617-253-0035