During development of information system, we have problems to choose appropriate architecture, technologies and methods. The conception of information system, designing methods, problems, related with information system development is given in this work. There are mentioned the main security requirement for hospital information system. We analyze created system “Information system of psychophysiology rehabilitation patients”. There are mentioned the main cases why client/server architecture, new technology adaptation were selected. The comparison of methods for data interface realization: PL/SQL language written in stored procedures and query generation is given. The selected method rating - how it speed system developing and how it influence system performance are evaluated. There are given experiments, which decrease system performance by selected methods.

Semantika informacinių technologijų kontekste yra duomenų apdorojimas pagal prasmę ir kontekstą. Tam įgyvendinti yra taikomas natūralios kalbos apdorojimas, pritaikytas informacijos paieškai, išrinkimui, analizavimui.Taikant semantines technologijas, kūrėjams dažnai kyla klausimas, kaip sukurti semantinės paieškos sąsają, kad ji būtų patogi ir duotų kuo tikslesnius atsakymus į vartotojų užklausas. Šiame darbe aprašomas sukurtas metodas, kuris padeda vartotojui palaipsniui formuoti SPARQL užklausą iš atskirų elementų, dinamiškai keičiant vartotojo sąsają. / Increasing popularity of Semantic Web raises a question how we could make a simple user interface for building semantic queries while keeping high precision of results returned. This thesis presents a method that helps users to create SPARQL queries by allowing to dynamically add components to user interface. The goal of the work is to improve of user interface model for semantic queries by allowing users to construct and change it dynamically till obtaining the desirable answer results. That model was created on the base of analysis of Semantic Web languages, tools and existing portals, their functions and user interfaces. Algorithms for dynamic user interface generation based on user actions were developed that allow creating queries of various complexities with minimal amount of user interface components. Implementation and testing the prototype of the system using movie and wine ontologies has shown that dynamic construction and generation of query interface has desirable functionality and is easily applicable to various ontologies. Experimental comparison with existing semantic search portals has shown that the proposed dynamic user interface generation method could improve precision and recall of semantic queries and may be applied in semantic search portal applications.