A new middleware core, implemented on Java, has been developed. It uses Tomcat servlet-container, frameworks JSF, STRUTS, and DBMS which are supported by JDBC. Xerces is used as parser for the work with XML documents.
The second version of software was developed for implementation of information-computational systems, oriented on procedural data representation in the Internet. Based on the example of molecular spectroscopy information system a model of three-layer information system was realized.