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Bianchini slides c-ai_se2013_

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  • 1. A Multi-perspective Framework for Web API Search in Enterprise Mashup Design Devis Bianchini, Valeria De Antonellis, Michele Melchiori University of Brescia Department of Information Engineering Valencia – June 20th, 2013 CAiSE 2013
  • 2. A motivating example Josephine is a web designer who aims at building a web application for her enterprise to advertise products through e-commerce facilities and to display customers' info The ProgrammableWeb API public repository has been made available, where Web API providers share their own components and web designers can look for Web APIs they need ➢ the design of the web application is a time-consuming task and requires advanced skill ➢ already available Web APIs, such as Amazon and Google Maps APIs, have been implemented for this purpose
  • 3. On ProgrammableWeb you can... Find Web APIs by keywords or by tags (matched against the descriptions associated with APIs in the repository) Filter available Web APIs according to their category, the company, the protocol, the data format Find mashups composed of the available Web APIs Sort found Web APIs according to different criteria
  • 4. On ProgrammableWeb you cannot... ➢ Perform advanced search by specifying both the features of the Web API to search for and of the Web mashups which the Web API will be used in ➢ Avoid limitations of traditional tag-based search (polisemy, omonyms) ➢ Be assisted in more complex search scenarios, where Josephine needs a proactive support for her search, by relying on past experiences of other developers in using available Web APIs
  • 5. Our proposal ➢ A multi-perspective Web API model, based on the Web APIs themselves (component perspective), enterprise mashups built with Web APIs (application perspective), Web designers who used Web APIs to build their own mashups (experience perspective) ➢ A framework leveraging the model, to perform advanced Web API search and ranking ➢ Full backward compliance with existing Web API repositories (specifically, the ProgrammableWeb repository)
  • 6. Talk outline • Multi­perspective Web API model • Web API search model • The framework architecture • Search and ranking measures • Final remarks
  • 7. The model
  • 8. The component perspective W = 〈cW,{tW},PW,FW,SSLW,AW,τW,HW〉 ProgrammableWeb category set of semantic tags ProgrammableWeb technical features WordNet-based sense disambiguation
  • 9. The component perspective W = 〈cW,{tW},PW,FW,SSLW,AW,τW,HW〉 ProgrammableWeb category set of semantic tags ProgrammableWeb technical features WordNet-based sense disambiguation a semantic tag belongs to a synset and is described by a sense
  • 10. The application perspective M = 〈{tM},{WM}〉 set of semantic tags set of Web APIs the mashup is composed of
  • 11. The experience perspective di ∈DW = 〈internal/external, σi , {〈Wj,Mk,µjk〉}〉 internal/external to the enterprise
  • 12. The experience perspective di ∈DW = 〈internal/external, σi , {〈Wj,Mk,µjk〉}〉 internal/external to the enterprise designer's skill in developing web mashups 0.0 unexperienced 0.3 low confidence 0.5 medium confidence 0.8 high confidence 1.0 expert
  • 13. The experience perspective di ∈DW = 〈internal/external, σi , {〈Wj,Mk,µjk〉}〉 internal/external to the enterprise designer's skill in developing web mashups ratings µjk assigned to the Web API Wj as used within Mk
  • 14. The experience perspective di ∈DW = 〈internal/external, σi , {〈Wj,Mk,µjk〉}〉 internal/external to the enterprise designer's skill in developing web mashups ratings µjk assigned to the Web API Wj as used within Mk
  • 15. Web API search model The search typology identifies the way Web API search is performed The search target identifies the goal of the Web API search
  • 16. The framework architecture
  • 17. Web API similarity Similarity between the request and each available Web API is performed according to: ➢ the component perspective (APISim) - linear combination of similarity with respect to categories and semantic tags ➢ the application perspective (MashupSim) – proportional to the similarity between the Web API will be inserted ({tr M},{Wr M}) and the mashups where it has been used in the past ➢ a Web API can be used by several mashups by designers with different skills (take care of the experience perspective)
  • 18. Web API similarity Similarity between the request and each available Web API is performed according to: ➢ the component perspective (APISim) - linear combination of similarity with respect to categories and semantic tag ➢ the application perspective (MashupSim) – proportional to the similarity between the Web API will be inserted ({tr M},{Wr M}) and the mashups where it has been used in the past ➢ a Web API can be used by several mashups by designers with different skills (take care of the experience perspective)
  • 19. Web API similarity Similarity between the request and each available Web API is performed according to: ➢ the component perspective (APISim) - linear combination of similarity with respect to categories and semantic tag ➢ the application perspective (MashupSim) – proportional to the similarity between the Web API will be inserted ({tr M},{Wr M}) and the mashups where it has been used in the past ➢ a Web API can be used by several mashups by designers with different skills (take care of the experience perspective)
  • 20. Web API similarity Similarity between the request and each available Web API is performed according to: ➢ the component perspective (APISim) - linear combination of similarity with respect to categories and semantic tag ➢ the application perspective (MashupSim) – proportional to the similarity between the Web API will be inserted ({tr M},{Wr M}) and the mashups where it has been used in the past ➢ a Web API can be used by several mashups by designers with different skills (take care of the experience perspective)
  • 21. Web API ranking Web APIs {W'} included among the search results ({W'}⊆{W}) are ranked according to: based on ratings µjk assigned to the Web API Wj based on technical features (several metrics available from the literature)
  • 22. The framework architecture
  • 23. The framework Web Interface
  • 24. The framework Web Interface (cont.)
  • 25. Evaluation issues We performed a preliminary evaluation on the precision of the collaborative system in retrieving Web APIs and on ranking procedure ➢ we considered a subset of 922 Web APIs from ProgrammableWeb ➢ we collected a subset of mashups from the same repository, built with the selected Web APIs and the corresponding developers ➢ we performed semantic tagging of Web APIs starting from the keywords extracted from Web APIs and mashup descriptions and from tags on ProgrammableWeb ➢ we classified developers' skill on the basis of the number of mashups and APIs they own
  • 26. Conclusions and future work We proposed a multi-perspective Web API model and framework based on it, built on top of the a Web API repository, to better support Web APIselection and ranking Future efforts will be devoted to: ➢ enrichment of Web API characterization with additional features (e.g., Web API quality, but also social organization of web designers) ➢ use of additional sources for sense disambiguation (e.g., DBPedia) ➢ integration of Web API information coming from different repositories (e.g., Mashape)
  • 27. Thanks! Devis Bianchini: bianchin@ing.unibs.it