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Maurizio Pighin Dipartimento di Matematica e Informatica Università di Udine, Italy

Venezia, 14-16 Marzo 2001 Using IR Techniques Catalogue, Reuse and Maintain Existing Software Objects. Maurizio Pighin Dipartimento di Matematica e Informatica Università di Udine, Italy e-mail: pighin@dimi.uniud.it. Introduction. Using IR tools to catalogue software life-cycle

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Maurizio Pighin Dipartimento di Matematica e Informatica Università di Udine, Italy

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  1. Venezia, 14-16 Marzo 2001Using IR Techniques Catalogue, Reuse and Maintain Existing Software Objects Maurizio Pighin Dipartimento di Matematica e Informatica Università di Udine, Italy e-mail: pighin@dimi.uniud.it Slide 1

  2. Introduction • Using IR tools to catalogue software life-cycle • Work done up-to-date • First Model Definition • Experimental Analysis • Result Assessment • Future perspectives • Model extension to “specification • Definition of mobility “feature” • New Experimental Analysis Slide 2

  3. Introduction • Existing SW Objects • Specifications • Data-Model • Code • Test Chain • … • Software Object Catalogue • Repository of heterogeneous information Slide 3

  4. Introduction • Difficulties • Catalogue organization definition • Adopted methodology to fill it • Supported techniques to analyze it • … • with Existing Software Objects • The economic break-even point is very high • Novel approach • Understand how heterogeneous information must be organized • Application of Information Retrieval techniques • Experimental evaluation on these techniques Slide 4

  5. The Proposed Methodology • First Step • Verification on code-objects the soundness of proposal • ALICE (AppLication of Information Retrieval to Catalogues of Existing software) is the Experimental System produced Slide 5

  6. The Proposed Methodology • Search Functionalities which must be at disposal of user • Structure of objects which must be catalogued • task-analysis of Sw-engineer work permits us to built a basic functionalities model Slide 6

  7. The Proposed Methodology • Four basic search methodologies on a Software Catalogue • semantics-driven search • data-definition driven search • structure-driven search • syntax-driven search • These search mechanisms can be combined in more complex strategies • From mechanism we found the feature which defines the keys of catalogue search Slide 7

  8. The Proposed Methodology • The structure can automatically be built by SW-Objects and can be indexed in the catalogue • Depending from object format and from requested feature specialized parsers must be built which analyze the objects end extract interesting feature references Slide 8

  9. The IR tool • ALICE is built on Z-PRISE (statistical engine) • We built the specialized parser which analyzes and indexes an industrial SW package (about 150.000 “C” code lines) • We defined a specialized client which easily interacts with query, features and the ranked list extracted by Z-Prise engine Slide 9

  10. Slide 10

  11. The experiment • Ten students, one expert • Three management problems • 20 minutes for every problem • Operation objective analysis • SW-Monitor with operation-logAnalisi soggettiva • Operation Subjective analysis • Questionnaries • Semantic differential • Likert Scale (used the know-how of project IRNLI-Information Retrieval, Natural Language Interface) Slide 11

  12. Results Slide 12

  13. Le Valutazioni • Score mechanism • Interesting results about • Effectiveness • Easy of use • Efficiency • The system seem powerful and sound • This part of work is presented at • International Conference on Software Maintenance and Reuse, CSMR 2001, Lisboa • Information Software Technology, Vol 51/2-3, Elsevier Science Publications, Clare (IR), 2000, pp. 131-138 Slide 13

  14. The Actual/Future Steps • Attention on other SW objects • Specification mechanism • UML • E-R • Informal specification • Actual activities • “Feature” definition • Particular attention at “mobility” aspects (PhD-Thesis Gian Pietro Picco – Milan Politecnico team) • Mobility code and data • Security • Traslation • Communication • ….. Slide 14

  15. Reference schemas Slide 15

  16. I Passi Attuali/Futuri • … Continue Activity • Definition of Data Base on which work (Ericsson - UTMS specification Team) • Application of more specification schemas • Parser (feature) definition • Search interface definition • Search schemas (feature) definition • Test on a significant Data Base • Assessment of results Slide 16

  17. The potential results • (Reasonable) Automatic Cataloguing of existing specifications • Homogenization of specifications defined in heterogeneously (like UTMS specification team) • Use of powerful cataloguing and search IR tools Slide 17

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