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Internet Resources Discovery (IRD)

Internet Resources Discovery (IRD). Classic IRD Tools. Classic IRD Tools. Telnet Interface Archie Gopher/Veronica WAIS X.500/LDAP Netfind. Telnet Interface. Archie (1). Service for indexing ftp file names. Usually replicated to allow more users to use the database.

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Internet Resources Discovery (IRD)

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  1. Internet Resources Discovery (IRD) Classic IRD Tools T.Sharon-A.Frank

  2. Classic IRD Tools • Telnet Interface • Archie • Gopher/Veronica • WAIS • X.500/LDAP • Netfind T.Sharon-A.Frank

  3. Telnet Interface T.Sharon-A.Frank

  4. Archie (1) • Service for indexing ftp file names. • Usually replicated to allow more users to use the database. • FAQ: http://www.ou.edu/research/electron/internet/archifaq.htm T.Sharon-A.Frank

  5. Archie (2) T.Sharon-A.Frank

  6. Archie (3) T.Sharon-A.Frank

  7. Gopher/Veronica (1) • Gopher is a directory of files, file directories and services. • Veronica is the uniform user interface. • Veronica’s user interface is based on menus, which offer searches on certain subjects. • Once a resource is found - the user can access it directly, without invoking intermediate programs (e.g. ftp, telnet). • Still around - gopher://gopher.floodgap.com/ T.Sharon-A.Frank

  8. Gopher (2) T.Sharon-A.Frank

  9. WAIS (1) • WAIS - Wide Area Information Servers • Provides a full text index and keywords search services on documents. • WAIS is based on Z39.50 ANSI standard for bibliographic information. T.Sharon-A.Frank

  10. WAIS (2) T.Sharon-A.Frank

  11. X.500/LDAP (1) • X.500 standards define a specification for a rich, global, distributed directory. • Directory is based on hierarchically named information objects. • Users can browse and search directory using arbitrary fields. • LDAP - Lightweight Directory Access Protocol • Information: http://www.kingsmountain.com/ldapRoadmap.shtml • Example: http://ldap.utexas.edu:8888/M T.Sharon-A.Frank

  12. X.500 (2) T.Sharon-A.Frank

  13. Netfind (1) • Provides a White Pages service. • Used for locating information on users. • Uses a lot of network tools/databases. • finger • whois • mail protocol (SMTP) T.Sharon-A.Frank

  14. Netfind (2) • http://ds.carnet.hr/netfind/indexe.html T.Sharon-A.Frank

  15. Netfind (3) T.Sharon-A.Frank

  16. Netfind: Information Gathering Framework 1. Information Source Selection 2. Information Collection 3. Information Filtering 4. Combining Heterogeneous Information T.Sharon-A.Frank

  17. Netfind Search (1) Domain cc.biu.ac.il returns: ( 0) Doing fallback lookup for ldap.tcp.cc.biu.ac.il. ( 0) Doing fallback lookup for ph.tcp.cc.biu.ac.il. ( 0) Doing fallback lookup for whois.tcp.cc.biu.ac.il. ( 0) Doing fallback lookup for ldap.cc.biu.ac.il. ( 0) Doing fallback lookup for whois.cc.biu.ac.il. ( 0) Doing fallback lookup for ph.cc.biu.ac.il. ( 0) SMTP_Finger_Search: checking domain cc.biu.ac.il The domain 'cc.biu.ac.il' does not run its own name servers, and there is no aliased domain IP address/CNAME/MX record for this domain -> Skipping domain search phase for this domain. PHASE [host search]: 0. ashur.cc.biu.ac.il 1. alon.cc.biu.ac.il 2. shikma.cc.biu.ac.il 3. brosh.cc.biu.ac.il ( 0) SMTP_Finger_Search: checking host ashur.cc.biu.ac.il ( 1) SMTP_Finger_Search: checking host alon.cc.biu.ac.il ( 2) SMTP_Finger_Search: checking host shikma.cc.biu.ac.il ( 3) SMTP_Finger_Search: checking host brosh.cc.biu.ac.il ( 0) read timed out ( 3) read timed out ( 1) read timed out T.Sharon-A.Frank

  18. Netfind Search (2) Domain cs.biu.ac.il returns: ( 0) LookupAndFillInDomInfo: got address of domain: cs.biu.ac.il (132.70.1.24) ( 0) Doing fallback lookup for ldap.tcp.cs.biu.ac.il. ( 0) Doing fallback lookup for ph.tcp.cs.biu.ac.il. ( 0) Doing fallback lookup for whois.tcp.cs.biu.ac.il. ( 0) Doing fallback lookup for ldap.cs.biu.ac.il. ( 0) Doing fallback lookup for whois.cs.biu.ac.il. ( 0) Doing fallback lookup for ph.cs.biu.ac.il. ( 0) SMTP_Finger_Search: checking domain cs.biu.ac.il Mail for Prof. J. B. Muskat is forwarded to muskat@sunbeam.cs.biu.ac.il NOTE: this is a domain mail forwarding arrangement - so mail intended for "muskat" should be addressed to"muskat@cs.biu.ac.il" rather than "muskat@sunbeam.cs.biu.ac.il". ( 0) SMTP_Finger_Search: checking host sunbeam.cs.biu.ac.il SYSTEM: sunbeam.cs.biu.ac.il Login name: muskat In real life: Prof. J. B. Muskat Directory: /u/segel/muskat Shell: /bin/Tcsh Last login Wed Jan 7 10:29 on ttyp1 from sunlight New mail received Thu Mar 19 19:03:54 1998; unread since Thu Mar 19 17:38:40 1998 No Plan. FINGER SUMMARY: - The most promising email address for "muskat" based on the above finger search is muskat@cs.biu.ac.il. T.Sharon-A.Frank

  19. IRD Data Design Choices T.Sharon-A.Frank

  20. IRD Metadata Design Choices T.Sharon-A.Frank

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