1. LE 1182 TREE TREE PMC3/97 UI Development

2. LE 1182 TREE TREE PMC3/97 P02 User Interface  Design Approach Rapid prototyping Rapid User evaluation  Requirements Provide search interface to TREE dB Multilingual support Client side validation of search terms ?  User Profile WWW community

3. LE 1182 TREE TREE PMC3/97 Simple Search Interface  Advantages Suggested by P01 User Trials Common WWW search interface (e.g. Alta Vista) Simple and obvious to use  Disadvantages Search process is opaque to users No client side validation of search terms  Possible Additions Support Boolean expressions in search string Provide additional refined or advanced interface

4. LE 1182 TREE TREE PMC3/97

5. LE 1182 TREE TREE PMC3/97 Advanced/Refined Search Interface 1  Advantages All schema slots and values presented Client side search term validation Familiar Windows style interface  User Evaluation Results Too complex Users disliked mixed ‘tab’ and ‘wizard’ dialogue box Users not expecting Windows style interface on WWW Lengthy download time

6. LE 1182 TREE TREE PMC3/97

7. LE 1182 TREE TREE PMC3/97

8. LE 1182 TREE TREE PMC3/97

9. LE 1182 TREE TREE PMC3/97

10. LE 1182 TREE TREE PMC3/97

11. LE 1182 TREE TREE PMC3/97 Advanced Interface 2  Advantages Users prompted for valid additional search terms Easy and obvious to use  User Evaluation Results Generally positive Require realistic test data for full evaluation Search process still opaque P02 User trials on multiple interfaces

12. LE 1182 TREE TREE PMC3/97

13. LE 1182 TREE TREE PMC3/97 Search Engine  Basic Strategy Identify vacancies in Schema dB which have one or more slot values which are siblings, cousins or children of a code associated with a search term.  Parsing Search String for simple search Individual Search Terms Extracted  Obtaining Terminology Codes Look up for every individual search term … and every possible sequential conjunction of search terms.

14. LE 1182 TREE TREE PMC3/97 Executing Search  Template SQL statement: SELECT * FROM, [table2,]..., [ ] WHERE [. IN (SELECT child FROM term_hierarchy WHERE slot= AND child IN (SELECT child FROM term_hierarchy START WITH parent= (SELECT parent FROM term_hierarchy WHERE child= ) CONNECT BY PRIOR child=parent))] OR [....]

15. LE 1182 TREE TREE PMC3/97 Results Ranking  Case Based Reasoning Weighting Exact match and children score highest Siblings and Parent Cousins  Conflict Resolution Search terms may identify non-related branches in hierarchy Preference to codes associated with multiple terms I.e. ‘chemical engineer’ Prompt user with options to specify single branch

16. LE 1182 TREE TREE PMC3/97 Implementation  UI HTML 3.2 compliant Java (JDK 1.0.2)/ Java Script  Search Engine Oracle Web Server 2.1 Search engine written as WRB cartridge Search engine and CBR ranking - C/C++