This quantity incorporates a number of papers offered on the fifteenth foreign convention on purposes of Declarative Programming and data M- agement, INAP 2004, and the 18th Workshop on common sense Programming, WLP 2004, which have been held together in Potsdam, Germany, from March 4th to sixth, 2004. Declarative programming is a complicated paradigm for the modeling and fixing of complicated difficulties. This speci?cation procedure has turn into progressively more beautiful in recent times, for instance, within the domain names of databases, for the processing of typical language, for the modeling and processing of combinatorial difficulties, and for developing knowledge-based structures for the internet. The INAP meetings offer a discussion board for in depth discussions of appli- tions of significant applied sciences round common sense programming, constraint challenge fixing, and heavily comparable complicated software program. They comprehensively disguise the effect of programmable good judgment solvers within the web society, its underlying te- nologies, and modern functions in undefined, trade, executive, and social providers. The Workshops on common sense Programming are the yearly assembly of the Society for good judgment Programming (GLP e.V.). they create jointly researchers drawn to good judgment programming, constraint programming, and comparable components like databases and arti?cial intelligence. prior workshops were held in Germany, A- tria, and Switzerland. Thetopicsoftheselectedpapersofthisyear’sjointconferenceconcentrateon 3 at present very important ?elds: wisdom administration and selection help, constraint programming and constraint fixing, and declarative programming and Web-based platforms.