Interactive Visualisation of RELAX NG Schemas

The aim of this thesis is to create a tool for visualisation of RELAX NG schemas. RELAX NG schemas define a form of XML documents. They determine what elements and attributes can be used in the document and how they can be combined. Visualisation of schemas enables easier orientation in the structure of RELAX NG patterns. This can be useful for both developers of schemas and users who use schemas for creation of XML documents. RELAX NG schema can be written using XML, which enables its visual representation by means of tree structure. Moreover, the model of the tree is interactive which enables users to display only the branches they are interested in. The aim will be reached in several steps. At first, it is necessary to analyze properly the structures of RELAX NG language with respect to their future visualisation. Next step is SVG format for description of vector graphics. SVG format can be written using XML as well. Interactivity of the model described by SVG is enabled by ECMAScript. The conversion from RELAX NG to SVG graphics will be done by means of XSLT transformation. The main contribution of this thesis will be the visualisation which facilitates the orientation in the schema for both users and developers. Only XSLT processor and a file with XSLT transformation will be needed for the visualisation of RELAX NG. The file with XSLT transformation will be the output of this thesis. The thesis is divided into three main parts. The first part is focused on the analysis of the structures of RELAX NG language and the possibilities of their visualisation. Particular attention will be given to the current possibilities of graphic interpretation of schemas. The second part is devoted to the design of graphic symbols for individual nodes of the graphic model and the possibilities of their interaction. The third part deals with the prototype implementation of transformation of RELAX NG to SVG graphics