1. Providing Resilient Xpaths for External Adaptation Engines Iñaki Paz LKS, S. Coop. ONEKIN Research Group – UPV/EHU Donostia - San Sebastián, Spain June 14th, 2010

3. Adaptation aware Web Applications Architecture: Server Browser Depending on user profile and context, the Web Application reacts executing adaptation rules providing personalized contents. RULES “kind of” CONFIGURE ADAPTATION HTTP URL + Params Content Adaptation Rules Rules address what is adapted and how, based on user profile and context

9. External Adaptation XPATH is a language to select nodes in XML Documents XPATH is based on the TREE Structure of Documents /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/tr[4]

10. Web App Pages Change!!! /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/ tr[4] /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/ tr[6] If the page changes, wanted element may not be correctly selected

11. Web App Pages Change!!! /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/ tr[4] /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/ tr[6] If the page changes, wanted element may not be correctly selected OUR OBJECTIVE IS TO OBTAIN CHANGE RESILIENT XPATH EXPRESSIONS

16. XPath Induction /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/ tr[3] /html/body[1]/table[2]/tr[1]/td[3]/table[1]/tr[1]/td[2]/table[3]/ tr[6] Each STEP in an absolute XPATH selects one and only one ELEMENT

33. Contact Iñaki Paz [email_address] http://www.lks.es http://www.onekin.org